Search paging timeout with 1500 < n < 2000 results (#1221)

* Avoid paging links when offset is artificially set very high

* Ongoing fixes

* Adding logging and clean up transaction processing

* Add changelog

* More work on queries

* Keep working on getting tests passing

* More test fixes

* More work on tests

* More test works

* One more test attempt

* Ongoing fixes

* One more change

* FIxes to search algorithm

* Add changelog

* Clean up for review

* Fixed NPE in token matcher when system is not null and value is null

* test opposite (null system not null value)

* added null protection to all matchers

* Address review comments

* Address broken test

* Trying to resolve DB ordering issues

hapi-fhir-base/src/main/java/ca/uhn/fhir/rest/param/TokenOrListParam.java

@@ -77,6 +77,14 @@ public class TokenOrListParam extends BaseOrListParam<TokenOrListParam, TokenPar
 		return this;
 	}
 
+	/**
+	 * Add a new token to this list
+	 */
+	public TokenOrListParam add(String theValue) {
+		add(new TokenParam(null, theValue));
+		return this;
+	}
+
 	public List<BaseCodingDt> getListAsCodings() {
 		ArrayList<BaseCodingDt> retVal = new ArrayList<BaseCodingDt>();
 		for (TokenParam next : getValuesAsQueryTokens()) {

hapi-fhir-base/src/main/resources/ca/uhn/fhir/i18n/hapi-messages.properties

@@ -63,6 +63,7 @@ ca.uhn.fhir.validation.ValidationResult.noIssuesDetected=No issues detected duri
 
 ca.uhn.fhir.jpa.config.HapiFhirHibernateJpaDialect.resourceVersionConstraintFailure=The operation has failed with a version constraint failure. This generally means that two clients/threads were trying to update the same resource at the same time, and this request was chosen as the failing request.
 ca.uhn.fhir.jpa.config.HapiFhirHibernateJpaDialect.resourceIndexedCompositeStringUniqueConstraintFailure=The operation has failed with a unique index constraint failure. This probably means that the operation was trying to create/update a resource that would have resulted in a duplicate value for a unique index. 
+ca.uhn.fhir.jpa.config.HapiFhirHibernateJpaDialect.forcedIdConstraintFailure=The operation has failed with a client-assigned ID constraint failure. This typically means that multiple client threads are trying to create a new resource with the same client-assigned ID at the same time, and this thread was chosen to be rejected.  
 
 ca.uhn.fhir.jpa.dao.BaseHapiFhirDao.incomingNoopInTransaction=Transaction contains resource with operation NOOP. This is only valid as a response operation, not in a request
 ca.uhn.fhir.jpa.dao.BaseHapiFhirDao.invalidMatchUrlInvalidResourceType=Invalid match URL "{0}" - Unknown resource type: "{1}"

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/BaseConfig.java

@@ -20,6 +20,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.*;
 import org.springframework.core.env.Environment;
 import org.springframework.core.task.AsyncTaskExecutor;
+import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
 import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
 import org.springframework.orm.jpa.vendor.HibernateJpaDialect;
@@ -158,13 +159,24 @@ public abstract class BaseConfig implements SchedulingConfigurer {
 		return new CompositeInMemoryDaoSubscriptionMatcher(daoSubscriptionMatcher(), inMemorySubscriptionMatcher());
 	}
 
+	@Bean
+	public HapiFhirHibernateJpaDialect hibernateJpaDialect() {
+		return new HapiFhirHibernateJpaDialect(fhirContext().getLocalizer());
+	}
+
+	@Bean
+	public PersistenceExceptionTranslationPostProcessor persistenceExceptionTranslationPostProcessor() {
+		return new PersistenceExceptionTranslationPostProcessor();
+	}
+
 	public static void configureEntityManagerFactory(LocalContainerEntityManagerFactoryBean theFactory, FhirContext theCtx) {
 		theFactory.setJpaDialect(hibernateJpaDialect(theCtx.getLocalizer()));
 		theFactory.setPackagesToScan("ca.uhn.fhir.jpa.model.entity", "ca.uhn.fhir.jpa.entity");
 		theFactory.setPersistenceProvider(new HibernatePersistenceProvider());
 	}
 
-	private static HibernateJpaDialect hibernateJpaDialect(HapiLocalizer theLocalizer) {
+	private static HapiFhirHibernateJpaDialect hibernateJpaDialect(HapiLocalizer theLocalizer) {
 		return new HapiFhirHibernateJpaDialect(theLocalizer);
 	}
+
 }

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/HapiFhirHibernateJpaDialect.java

@@ -21,20 +21,26 @@ package ca.uhn.fhir.jpa.config;
  */
 
 import ca.uhn.fhir.i18n.HapiLocalizer;
+import ca.uhn.fhir.jpa.model.entity.ForcedId;
 import ca.uhn.fhir.jpa.model.entity.ResourceHistoryTable;
 import ca.uhn.fhir.jpa.model.entity.ResourceIndexedCompositeStringUnique;
-import ca.uhn.fhir.rest.server.exceptions.PreconditionFailedException;
 import ca.uhn.fhir.rest.server.exceptions.ResourceVersionConflictException;
 import org.hibernate.HibernateException;
 import org.hibernate.exception.ConstraintViolationException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.dao.DataAccessException;
-import org.springframework.data.mapping.PreferredConstructor;
+import org.springframework.orm.ObjectOptimisticLockingFailureException;
 import org.springframework.orm.jpa.vendor.HibernateJpaDialect;
 
+import javax.persistence.PersistenceException;
+
 import static org.apache.commons.lang3.StringUtils.defaultString;
+import static org.apache.commons.lang3.StringUtils.isNotBlank;
 
 public class HapiFhirHibernateJpaDialect extends HibernateJpaDialect {
 
+	private static final Logger ourLog = LoggerFactory.getLogger(HapiFhirHibernateJpaDialect.class);
 	private HapiLocalizer myLocalizer;
 
 	/**
@@ -44,17 +50,40 @@ public class HapiFhirHibernateJpaDialect extends HibernateJpaDialect {
 		myLocalizer = theLocalizer;
 	}
 
+
+	public RuntimeException translate(PersistenceException theException, String theMessageToPrepend) {
+		if (theException.getCause() instanceof HibernateException) {
+			return new PersistenceException(convertHibernateAccessException((HibernateException) theException.getCause(), theMessageToPrepend));
+		}
+		return theException;
+	}
+
 	@Override
 	protected DataAccessException convertHibernateAccessException(HibernateException theException) {
+		return convertHibernateAccessException(theException, null);
+	}
+
+	private DataAccessException convertHibernateAccessException(HibernateException theException, String theMessageToPrepend) {
+		String messageToPrepend = "";
+		if (isNotBlank(theMessageToPrepend)) {
+			messageToPrepend = theMessageToPrepend + " - ";
+		}
+		if (theException.toString().contains("Batch update")) {
+			theException.toString();
+		}
+		// <editor-fold desc="I HATE YOU">
 		if (theException instanceof ConstraintViolationException) {
 			String constraintName = ((ConstraintViolationException) theException).getConstraintName();
 			switch (defaultString(constraintName)) {
 				case ResourceHistoryTable.IDX_RESVER_ID_VER:
-					throw new ResourceVersionConflictException(myLocalizer.getMessage(HapiFhirHibernateJpaDialect.class, "resourceVersionConstraintFailure"));
+					throw new ResourceVersionConflictException(messageToPrepend + myLocalizer.getMessage(HapiFhirHibernateJpaDialect.class, "resourceVersionConstraintFailure"));
 				case ResourceIndexedCompositeStringUnique.IDX_IDXCMPSTRUNIQ_STRING:
-					throw new ResourceVersionConflictException(myLocalizer.getMessage(HapiFhirHibernateJpaDialect.class, "resourceIndexedCompositeStringUniqueConstraintFailure"));
+					throw new ResourceVersionConflictException(messageToPrepend + myLocalizer.getMessage(HapiFhirHibernateJpaDialect.class, "resourceIndexedCompositeStringUniqueConstraintFailure"));
+				case ForcedId.IDX_FORCEDID_TYPE_FID:
+					throw new ResourceVersionConflictException(messageToPrepend + myLocalizer.getMessage(HapiFhirHibernateJpaDialect.class, "forcedIdConstraintFailure"));
 			}
 		}
+		// </editor-fold>
 
 		return super.convertHibernateAccessException(theException);
 	}

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/dao/BaseHapiFhirResourceDao.java

@@ -919,7 +919,7 @@ public abstract class BaseHapiFhirResourceDao<T extends IBaseResource> extends B
 
 	@Override
 	public T read(IIdType theId, RequestDetails theRequestDetails, boolean theDeletedOk) {
-		validateResourceTypeAndThrowIllegalArgumentException(theId);
+		validateResourceTypeAndThrowInvalidRequestException(theId);
 
 		// Notify interceptors
 		if (theRequestDetails != null) {
@@ -956,7 +956,7 @@ public abstract class BaseHapiFhirResourceDao<T extends IBaseResource> extends B
 
 	@Override
 	public BaseHasResource readEntity(IIdType theId, boolean theCheckForForcedId) {
-		validateResourceTypeAndThrowIllegalArgumentException(theId);
+		validateResourceTypeAndThrowInvalidRequestException(theId);
 
 		Long pid = myIdHelperService.translateForcedIdToPid(getResourceName(), theId.getIdPart());
 		BaseHasResource entity = myEntityManager.find(ResourceTable.class, pid);
@@ -1427,9 +1427,10 @@ public abstract class BaseHapiFhirResourceDao<T extends IBaseResource> extends B
 		validateResourceType(entity, myResourceName);
 	}
 
-	private void validateResourceTypeAndThrowIllegalArgumentException(IIdType theId) {
+	private void validateResourceTypeAndThrowInvalidRequestException(IIdType theId) {
 		if (theId.hasResourceType() && !theId.getResourceType().equals(myResourceName)) {
-			throw new IllegalArgumentException("Incorrect resource type (" + theId.getResourceType() + ") for this DAO, wanted: " + myResourceName);
+			// Note- Throw a HAPI FHIR exception here so that hibernate doesn't try to translate it into a database exception
+			throw new InvalidRequestException("Incorrect resource type (" + theId.getResourceType() + ") for this DAO, wanted: " + myResourceName);
 		}
 	}
 

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/dao/SearchBuilder.java

@@ -108,7 +108,11 @@ public class SearchBuilder implements ISearchBuilder {
 
 	private static final List<Long> EMPTY_LONG_LIST = Collections.unmodifiableList(new ArrayList<>());
 	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(SearchBuilder.class);
-	private static final int maxLoad = 800;
+	/**
+	 * @see #loadResourcesByPid(Collection, List, Set, boolean, EntityManager, FhirContext, IDao)
+	 * for an explanation of why we use the constant 800
+	 */
+	private static final int MAXIMUM_PAGE_SIZE = 800;
 	private static Long NO_MORE = -1L;
 	private static HandlerTypeEnum ourLastHandlerMechanismForUnitTest;
 	private static SearchParameterMap ourLastHandlerParamsForUnitTest;
@@ -1998,8 +2002,8 @@ public class SearchBuilder implements ISearchBuilder {
 		 * but this should work too. Sigh.
 		 */
 		List<Long> pids = new ArrayList<>(theIncludePids);
-		for (int i = 0; i < pids.size(); i += maxLoad) {
+		for (int i = 0; i < pids.size(); i += MAXIMUM_PAGE_SIZE) {
-			int to = i + maxLoad;
+			int to = i + MAXIMUM_PAGE_SIZE;
 			to = Math.min(to, pids.size());
 			List<Long> pidsSubList = pids.subList(i, to);
 			doLoadPids(theResourceListToPopulate, theIncludedPids, theForHistoryOperation, entityManager, context, theDao, position, pidsSubList);
@@ -2046,7 +2050,7 @@ public class SearchBuilder implements ISearchBuilder {
 				if (matchAll) {
 					String sql;
 					sql = "SELECT r FROM ResourceLink r WHERE r." + searchFieldName + " IN (:target_pids) ";
-					List<Collection<Long>> partitions = partition(nextRoundMatches, maxLoad);
+					List<Collection<Long>> partitions = partition(nextRoundMatches, MAXIMUM_PAGE_SIZE);
 					for (Collection<Long> nextPartition : partitions) {
 						TypedQuery<ResourceLink> q = theEntityManager.createQuery(sql, ResourceLink.class);
 						q.setParameter("target_pids", nextPartition);
@@ -2099,7 +2103,7 @@ public class SearchBuilder implements ISearchBuilder {
 							sql = "SELECT r FROM ResourceLink r WHERE r.mySourcePath = :src_path AND r." + searchFieldName + " IN (:target_pids)";
 						}
 
-						List<Collection<Long>> partitions = partition(nextRoundMatches, maxLoad);
+						List<Collection<Long>> partitions = partition(nextRoundMatches, MAXIMUM_PAGE_SIZE);
 						for (Collection<Long> nextPartition : partitions) {
 							TypedQuery<ResourceLink> q = theEntityManager.createQuery(sql, ResourceLink.class);
 							q.setParameter("src_path", nextPath);
@@ -2331,16 +2335,16 @@ public class SearchBuilder implements ISearchBuilder {
 		List<String> path = param.getPathsSplit();
 
 		/*
-		 * SearchParameters can declare paths on multiple resources
+		 * SearchParameters can declare paths on multiple resource
 		 * types. Here we only want the ones that actually apply.
 		 */
 		path = new ArrayList<>(path);
 
-		for (int i = 0; i < path.size(); i++) {
+		ListIterator<String> iter = path.listIterator();
-			String nextPath = trim(path.get(i));
+		while (iter.hasNext()) {
+			String nextPath = trim(iter.next());
 			if (!nextPath.contains(theResourceType + ".")) {
-				path.remove(i);
+				iter.remove();
-				i--;
 			}
 		}
 
@@ -2456,6 +2460,7 @@ public class SearchBuilder implements ISearchBuilder {
 				if (myMaxResultsToFetch == null) {
 					myMaxResultsToFetch = myDaoConfig.getFetchSizeDefaultMaximum();
 				}
+
 				final TypedQuery<Long> query = createQuery(mySort, myMaxResultsToFetch, false);
 
 				Query<Long> hibernateQuery = (Query<Long>) query;
@@ -2478,8 +2483,6 @@ public class SearchBuilder implements ISearchBuilder {
 							if (myPidSet.add(next)) {
 								myNext = next;
 								break;
-							} else {
-								mySkipCount++;
 							}
 					}
 				}
@@ -2509,8 +2512,6 @@ public class SearchBuilder implements ISearchBuilder {
 								if (myPidSet.add(next)) {
 									myNext = next;
 									break;
-								} else {
-									mySkipCount++;
 								}
 						}
 						if (myNext == null) {
@@ -2555,6 +2556,7 @@ public class SearchBuilder implements ISearchBuilder {
 		public int getSkippedCount() {
 			return mySkipCount;
 		}
+
 	}
 
 	private class UniqueIndexIterator implements IResultIterator {
@@ -2596,6 +2598,7 @@ public class SearchBuilder implements ISearchBuilder {
 		public int getSkippedCount() {
 			return 0;
 		}
+
 	}
 
 	private static class CountQueryIterator implements Iterator<Long> {

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/dao/TransactionProcessor.java

@@ -22,6 +22,7 @@ package ca.uhn.fhir.jpa.dao;
 
 import ca.uhn.fhir.context.FhirContext;
 import ca.uhn.fhir.context.RuntimeResourceDefinition;
+import ca.uhn.fhir.jpa.config.HapiFhirHibernateJpaDialect;
 import ca.uhn.fhir.jpa.model.entity.ResourceTable;
 import ca.uhn.fhir.jpa.provider.ServletSubRequestDetails;
 import ca.uhn.fhir.jpa.searchparam.MatchUrlService;
@@ -49,6 +50,7 @@ import com.google.common.collect.ArrayListMultimap;
 import org.apache.commons.lang3.Validate;
 import org.apache.http.NameValuePair;
 import org.hibernate.Session;
+import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.internal.SessionImpl;
 import org.hl7.fhir.dstu3.model.Bundle;
 import org.hl7.fhir.exceptions.FHIRException;
@@ -64,7 +66,9 @@ import org.springframework.transaction.support.TransactionTemplate;
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
 import javax.persistence.PersistenceContextType;
+import javax.persistence.PersistenceException;
 import java.util.*;
+import java.util.stream.Collectors;
 
 import static org.apache.commons.lang3.StringUtils.*;
 
@@ -85,6 +89,8 @@ public class TransactionProcessor<BUNDLE extends IBaseBundle, BUNDLEENTRY> {
 	private MatchUrlService myMatchUrlService;
 	@Autowired
 	private DaoRegistry myDaoRegistry;
+	@Autowired(required = false)
+	private HapiFhirHibernateJpaDialect myHapiFhirHibernateJpaDialect;
 
 	public BUNDLE transaction(RequestDetails theRequestDetails, BUNDLE theRequest) {
 		if (theRequestDetails != null) {
@@ -576,8 +582,8 @@ public class TransactionProcessor<BUNDLE extends IBaseBundle, BUNDLEENTRY> {
 			 */
 			for (int i = 0; i < theEntries.size(); i++) {
 
-				if (i % 100 == 0) {
+				if (i % 250 == 0) {
-					ourLog.debug("Processed {} non-GET entries out of {}", i, theEntries.size());
+					ourLog.info("Processed {} non-GET entries out of {} in transaction", i, theEntries.size());
 				}
 
 				BUNDLEENTRY nextReqEntry = theEntries.get(i);
@@ -749,7 +755,13 @@ public class TransactionProcessor<BUNDLE extends IBaseBundle, BUNDLEENTRY> {
 
 			FhirTerser terser = myContext.newTerser();
 			theTransactionStopWatch.startTask("Index " + theIdToPersistedOutcome.size() + " resources");
+			int i = 0;
 			for (DaoMethodOutcome nextOutcome : theIdToPersistedOutcome.values()) {
+
+				if (i++ % 250 == 0) {
+					ourLog.info("Have indexed {} entities out of {} in transaction", i, theIdToPersistedOutcome.values().size());
+				}
+
 				IBaseResource nextResource = nextOutcome.getResource();
 				if (nextResource == null) {
 					continue;
@@ -803,7 +815,16 @@ public class TransactionProcessor<BUNDLE extends IBaseBundle, BUNDLEENTRY> {
 			theTransactionStopWatch.endCurrentTask();
 			theTransactionStopWatch.startTask("Flush writes to database");
 
+			try {
 				flushJpaSession();
+			} catch (PersistenceException e) {
+				if (myHapiFhirHibernateJpaDialect != null) {
+					List<String> types = theIdToPersistedOutcome.keySet().stream().filter(t -> t != null).map(t -> t.getResourceType()).collect(Collectors.toList());
+					String message = "Error flushing transaction with resource types: " + types;
+					throw myHapiFhirHibernateJpaDialect.translate(e, message);
+				}
+				throw e;
+			}
 
 			theTransactionStopWatch.endCurrentTask();
 			if (conditionalRequestUrls.size() > 0) {

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/dao/data/ISearchParamPresentDao.java

@@ -33,6 +33,6 @@ import ca.uhn.fhir.jpa.model.entity.SearchParamPresent;
 public interface ISearchParamPresentDao extends JpaRepository<SearchParamPresent, Long> {
 
 	@Query("SELECT s FROM SearchParamPresent s WHERE s.myResource = :res")
-	public Collection<SearchParamPresent> findAllForResource(@Param("res") ResourceTable theResource);
+	Collection<SearchParamPresent> findAllForResource(@Param("res") ResourceTable theResource);
 
 }

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/graphql/JpaStorageServices.java

@@ -61,6 +61,7 @@ public class JpaStorageServices extends BaseHapiFhirDao<IBaseResource> implement
 		IFhirResourceDao<? extends IBaseResource> dao = getDao(typeDef.getImplementingClass());
 
 		SearchParameterMap params = new SearchParameterMap();
+		params.setLoadSynchronousUpTo(500);
 
 		for (Argument nextArgument : theSearchParams) {
 

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/search/PersistedJpaBundleProvider.java

@@ -201,16 +201,21 @@ public class PersistedJpaBundleProvider implements IBundleProvider {
 
 		switch (mySearchEntity.getSearchType()) {
 			case HISTORY:
-				return template.execute(new TransactionCallback<List<IBaseResource>>() {
+				return template.execute(theStatus -> doHistoryInTransaction(theFromIndex, theToIndex));
-					@Override
-					public List<IBaseResource> doInTransaction(TransactionStatus theStatus) {
-						return doHistoryInTransaction(theFromIndex, theToIndex);
-					}
-				});
 			case SEARCH:
 			case EVERYTHING:
 			default:
-				return doSearchOrEverything(theFromIndex, theToIndex);
+				List<IBaseResource> retVal = doSearchOrEverything(theFromIndex, theToIndex);
+				/*
+				 * If we got fewer resources back than we asked for, it's possible that the search
+				 * completed. If that's the case, the cached version of the search entity is probably
+				 * no longer valid so let's force a reload if it gets asked for again (most likely
+				 * because someone is calling size() on us)
+				 */
+				if (retVal.size() < theToIndex - theFromIndex) {
+					mySearchEntity = null;
+				}
+				return retVal;
 		}
 	}
 

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/search/SearchCoordinatorSvcImpl.java

@@ -463,11 +463,11 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 		private final ArrayList<Long> myUnsyncedPids = new ArrayList<>();
 		private Search mySearch;
 		private boolean myAbortRequested;
-		private int myCountSaved = 0;
+		private int myCountSavedTotal = 0;
+		private int myCountSavedThisPass = 0;
 		private boolean myAdditionalPrefetchThresholdsRemaining;
 		private List<Long> myPreviouslyAddedResourcePids;
 		private Integer myMaxResultsToFetch;
-		private int myCountFetchedDuringThisPass;
 
 		/**
 		 * Constructor
@@ -490,7 +490,7 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 
 		protected void setPreviouslyAddedResourcePids(List<Long> thePreviouslyAddedResourcePids) {
 			myPreviouslyAddedResourcePids = thePreviouslyAddedResourcePids;
-			myCountSaved = myPreviouslyAddedResourcePids.size();
+			myCountSavedTotal = myPreviouslyAddedResourcePids.size();
 		}
 
 		private ISearchBuilder newSearchBuilder() {
@@ -590,36 +590,46 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 					for (Long nextPid : myUnsyncedPids) {
 						SearchResult nextResult = new SearchResult(mySearch);
 						nextResult.setResourcePid(nextPid);
-						nextResult.setOrder(myCountSaved++);
+						nextResult.setOrder(myCountSavedTotal);
 						resultsToSave.add(nextResult);
-						ourLog.trace("Saving ORDER[{}] Resource {}", nextResult.getOrder(), nextResult.getResourcePid());
+						int order = nextResult.getOrder();
+						ourLog.trace("Saving ORDER[{}] Resource {}", order, nextResult.getResourcePid());
+
+						myCountSavedTotal++;
+						myCountSavedThisPass++;
 					}
+
 					mySearchResultDao.saveAll(resultsToSave);
 
 					synchronized (mySyncedPids) {
 						int numSyncedThisPass = myUnsyncedPids.size();
-						ourLog.trace("Syncing {} search results", numSyncedThisPass);
+						ourLog.trace("Syncing {} search results - Have more: {}", numSyncedThisPass, theResultIter.hasNext());
 						mySyncedPids.addAll(myUnsyncedPids);
 						myUnsyncedPids.clear();
 
 						if (theResultIter.hasNext() == false) {
-							mySearch.setNumFound(myCountSaved);
+							mySearch.setNumFound(myCountSavedTotal);
-							int loadedCountThisPass = theResultIter.getSkippedCount() + myCountSaved;
+							int skippedCount = theResultIter.getSkippedCount();
-							if (myMaxResultsToFetch != null && loadedCountThisPass < myMaxResultsToFetch) {
+							int totalFetched = skippedCount + myCountSavedThisPass;
+							ourLog.trace("MaxToFetch[{}] SkippedCount[{}] CountSavedThisPass[{}] CountSavedThisTotal[{}] AdditionalPrefetchRemaining[{}]", myMaxResultsToFetch, skippedCount, myCountSavedThisPass, myCountSavedTotal, myAdditionalPrefetchThresholdsRemaining);
+
+							if (myMaxResultsToFetch != null && totalFetched < myMaxResultsToFetch) {
+								ourLog.trace("Setting search status to FINISHED");
 								mySearch.setStatus(SearchStatusEnum.FINISHED);
-								mySearch.setTotalCount(myCountSaved);
+								mySearch.setTotalCount(myCountSavedTotal);
 							} else if (myAdditionalPrefetchThresholdsRemaining) {
 								ourLog.trace("Setting search status to PASSCMPLET");
 								mySearch.setStatus(SearchStatusEnum.PASSCMPLET);
 								mySearch.setSearchParameterMap(myParams);
 							} else {
+								ourLog.trace("Setting search status to FINISHED");
 								mySearch.setStatus(SearchStatusEnum.FINISHED);
-								mySearch.setTotalCount(myCountSaved);
+								mySearch.setTotalCount(myCountSavedTotal);
 							}
 						}
 					}
 
-					mySearch.setNumFound(myCountSaved);
+					mySearch.setNumFound(myCountSavedTotal);
 
 					int numSynced;
 					synchronized (mySyncedPids) {
@@ -684,7 +694,7 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 					}
 				});
 
-				ourLog.info("Completed search for [{}{}] and found {} resources in {}ms", mySearch.getResourceType(), mySearch.getSearchQueryString(), mySyncedPids.size(), sw.getMillis());
+				ourLog.info("Have completed search for [{}{}] and found {} resources in {}ms - Status is {}", mySearch.getResourceType(), mySearch.getSearchQueryString(), mySyncedPids.size(), sw.getMillis(), mySearch.getStatus());
 
 			} catch (Throwable t) {
 
@@ -850,8 +860,8 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 			/*
 			 * Construct the SQL query we'll be sending to the database
 			 */
-			IResultIterator theResultIterator = sb.createQuery(myParams, mySearch.getUuid());
+			IResultIterator resultIterator = sb.createQuery(myParams, mySearch.getUuid());
-			assert (theResultIterator != null);
+			assert (resultIterator != null);
 
 			/*
 			 * The following loop actually loads the PIDs of the resources
@@ -859,9 +869,8 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 			 * every X results, we commit to the HFJ_SEARCH table.
 			 */
 			int syncSize = mySyncSize;
-			while (theResultIterator.hasNext()) {
+			while (resultIterator.hasNext()) {
-				myUnsyncedPids.add(theResultIterator.next());
+				myUnsyncedPids.add(resultIterator.next());
-				myCountFetchedDuringThisPass++;
 
 				boolean shouldSync = myUnsyncedPids.size() >= syncSize;
 
@@ -879,7 +888,7 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 				Validate.isTrue(isNotAborted(), "Abort has been requested");
 
 				if (shouldSync) {
-					saveUnsynced(theResultIterator);
+					saveUnsynced(resultIterator);
 				}
 
 				if (myLoadingThrottleForUnitTests != null) {
@@ -895,7 +904,7 @@ public class SearchCoordinatorSvcImpl implements ISearchCoordinatorSvc {
 			// If no abort was requested, bail out
 			Validate.isTrue(isNotAborted(), "Abort has been requested");
 
-			saveUnsynced(theResultIterator);
+			saveUnsynced(resultIterator);
 		}
 	}
 

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/search/StaleSearchDeletingSvcImpl.java

@@ -131,7 +131,7 @@ public class StaleSearchDeletingSvcImpl implements IStaleSearchDeletingSvc {
 
 		TransactionTemplate tt = new TransactionTemplate(myTransactionManager);
 		final Slice<Long> toDelete = tt.execute(theStatus ->
-			mySearchDao.findWhereLastReturnedBefore(cutoff, PageRequest.of(0, 1000))
+			mySearchDao.findWhereLastReturnedBefore(cutoff, PageRequest.of(0, 2000))
 		);
 		for (final Long nextSearchToDelete : toDelete) {
 			ourLog.debug("Deleting search with PID {}", nextSearchToDelete);
@@ -148,9 +148,11 @@ public class StaleSearchDeletingSvcImpl implements IStaleSearchDeletingSvc {
 
 		int count = toDelete.getContent().size();
 		if (count > 0) {
+			if (ourLog.isDebugEnabled()) {
 				long total = tt.execute(t -> mySearchDao.count());
 				ourLog.debug("Deleted {} searches, {} remaining", count, total);
 			}
+		}
 
 	}
 

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/subscription/SubscriptionMatcherInterceptor.java

@@ -19,6 +19,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.messaging.SubscribableChannel;
 import org.springframework.stereotype.Component;
+import org.springframework.transaction.support.TransactionSynchronizationAdapter;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
 
 import javax.annotation.PreDestroy;
 
@@ -104,13 +106,28 @@ public class SubscriptionMatcherInterceptor implements IResourceModifiedConsumer
 	private void submitResourceModified(IBaseResource theNewResource, ResourceModifiedMessage.OperationTypeEnum theOperationType) {
 		ResourceModifiedMessage msg = new ResourceModifiedMessage(myFhirContext, theNewResource, theOperationType);
 
-		// Interceptor call: SUBSCRIPTION_RESOURCE_MODIFIED
+		/*
-		if (!myInterceptorBroadcaster.callHooks(Pointcut.SUBSCRIPTION_RESOURCE_MODIFIED, msg)) {
+		 * We only want to submit the message to the processing queue once the
-			return;
+		 * transaction is committed. We do this in order to make sure that the
+		 * data is actually in the DB, in case it's the database matcher.
+		 */
+		if (TransactionSynchronizationManager.isSynchronizationActive()) {
+			TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronizationAdapter() {
+				@Override
+				public int getOrder() {
+					return 0;
 				}
 
+				@Override
+				public void afterCommit() {
 					submitResourceModified(msg);
 				}
+			});
+		} else {
+			submitResourceModified(msg);
+		}
+
+	}
 
 	private void sendToProcessingChannel(final ResourceModifiedMessage theMessage) {
 		ourLog.trace("Sending resource modified message to processing channel");
@@ -127,6 +144,11 @@ public class SubscriptionMatcherInterceptor implements IResourceModifiedConsumer
 	 */
 	@Override
 	public void submitResourceModified(final ResourceModifiedMessage theMsg) {
+		// Interceptor call: SUBSCRIPTION_RESOURCE_MODIFIED
+		if (!myInterceptorBroadcaster.callHooks(Pointcut.SUBSCRIPTION_RESOURCE_MODIFIED, theMsg)) {
+			return;
+		}
+
 		sendToProcessingChannel(theMsg);
 	}
 

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/subscription/dbmatcher/DaoSubscriptionMatcher.java

@@ -36,16 +36,20 @@ import org.hl7.fhir.instance.model.api.IIdType;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.TransactionDefinition;
+import org.springframework.transaction.support.TransactionTemplate;
 
 public class DaoSubscriptionMatcher implements ISubscriptionMatcher {
-	private Logger ourLog = LoggerFactory.getLogger(DaoSubscriptionMatcher.class);
-
-	@Autowired
-	private FhirContext myCtx;
 	@Autowired
 	DaoRegistry myDaoRegistry;
 	@Autowired
 	MatchUrlService myMatchUrlService;
+	private Logger ourLog = LoggerFactory.getLogger(DaoSubscriptionMatcher.class);
+	@Autowired
+	private FhirContext myCtx;
+	@Autowired
+	private PlatformTransactionManager myTxManager;
 
 	@Override
 	public SubscriptionMatchResult match(CanonicalSubscription theSubscription, ResourceModifiedMessage theMsg) {
@@ -75,6 +79,10 @@ public class DaoSubscriptionMatcher implements ISubscriptionMatcher {
 		IFhirResourceDao<? extends IBaseResource> responseDao = myDaoRegistry.getResourceDao(responseResourceDef.getImplementingClass());
 		responseCriteriaUrl.setLoadSynchronousUpTo(1);
 
-		return responseDao.search(responseCriteriaUrl);
+		TransactionTemplate txTemplate = new TransactionTemplate(myTxManager);
+		txTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
+		return txTemplate.execute(t -> responseDao.search(responseCriteriaUrl));
+
 	}
+
 }

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/config/TestR4Config.java

@@ -3,6 +3,7 @@ package ca.uhn.fhir.jpa.config;
 import ca.uhn.fhir.rest.server.interceptor.RequestValidatingInterceptor;
 import ca.uhn.fhir.validation.ResultSeverityEnum;
 import net.ttddyy.dsproxy.listener.SingleQueryCountHolder;
+import net.ttddyy.dsproxy.listener.logging.SLF4JLogLevel;
 import net.ttddyy.dsproxy.support.ProxyDataSourceBuilder;
 import org.apache.commons.dbcp2.BasicDataSource;
 import org.springframework.context.annotation.Bean;
@@ -34,7 +35,6 @@ public class TestR4Config extends BaseJavaConfigR4 {
 		 * starvation
 		 */
 		ourMaxThreads = (int) (Math.random() * 6.0) + 1;
-		ourMaxThreads = 1;
 	}
 
 	private Exception myLastStackTrace;
@@ -96,7 +96,7 @@ public class TestR4Config extends BaseJavaConfigR4 {
 
 		DataSource dataSource = ProxyDataSourceBuilder
 			.create(retVal)
-//			.logQueryBySlf4j(SLF4JLogLevel.INFO, "SQL")
+			.logQueryBySlf4j(SLF4JLogLevel.INFO, "SQL")
 //			.logSlowQueryBySlf4j(10, TimeUnit.SECONDS)
 //			.countQuery(new ThreadQueryCountHolder())
 			.beforeQuery(new BlockLargeNumbersOfParamsListener())

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/config/UnregisterScheduledProcessor.java

@@ -15,6 +15,8 @@ import org.springframework.scheduling.concurrent.ExecutorConfigurationSupport;
  */
 public class UnregisterScheduledProcessor implements BeanFactoryPostProcessor {
 
+	public static final String SCHEDULING_DISABLED = "scheduling_disabled";
+
 	private final Environment myEnvironment;
 
 	public UnregisterScheduledProcessor(Environment theEnv) {
@@ -23,7 +25,7 @@ public class UnregisterScheduledProcessor implements BeanFactoryPostProcessor {
 
 	@Override
 	public void postProcessBeanFactory(final ConfigurableListableBeanFactory beanFactory) throws BeansException {
-		String schedulingDisabled = myEnvironment.getProperty("scheduling_disabled");
+		String schedulingDisabled = myEnvironment.getProperty(SCHEDULING_DISABLED);
 		if ("true".equals(schedulingDisabled)) {
 			for (String beanName : beanFactory.getBeanNamesForType(ScheduledAnnotationBeanPostProcessor.class)) {
 				((DefaultListableBeanFactory) beanFactory).removeBeanDefinition(beanName);

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/BaseJpaTest.java

@@ -11,6 +11,7 @@ import ca.uhn.fhir.jpa.search.ISearchCoordinatorSvc;
 import ca.uhn.fhir.jpa.search.PersistedJpaBundleProvider;
 import ca.uhn.fhir.jpa.search.reindex.IResourceReindexingSvc;
 import ca.uhn.fhir.jpa.searchparam.registry.ISearchParamRegistry;
+import ca.uhn.fhir.jpa.subscription.dbmatcher.DaoSubscriptionMatcher;
 import ca.uhn.fhir.jpa.term.VersionIndependentConcept;
 import ca.uhn.fhir.jpa.util.ExpungeOptions;
 import ca.uhn.fhir.jpa.util.JpaConstants;
@@ -316,6 +317,14 @@ public abstract class BaseJpaTest {
 		return retVal;
 	}
 
+	protected List<String> toUnqualifiedVersionlessIdValues(List<? extends IBaseResource> theFound) {
+		List<String> retVal = new ArrayList<>();
+		for (IBaseResource next : theFound) {
+			retVal.add(next.getIdElement().toUnqualifiedVersionless().getValue());
+		}
+		return retVal;
+	}
+
 	protected List<IIdType> toUnqualifiedVersionlessIds(org.hl7.fhir.dstu3.model.Bundle theFound) {
 		List<IIdType> retVal = new ArrayList<IIdType>();
 		for (BundleEntryComponent next : theFound.getEntry()) {

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/dstu2/FhirResourceDaoDstu2Test.java

@@ -1380,7 +1380,7 @@ public class FhirResourceDaoDstu2Test extends BaseJpaDstu2Test {
 		try {
 			myEncounterDao.read(outcome.getId(), mySrd);
 			fail();
-		} catch (IllegalArgumentException e) {
+		} catch (InvalidRequestException e) {
 			// expected
 		}
 		try {

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/dstu3/FhirResourceDaoDstu3Test.java

@@ -1788,7 +1788,7 @@ public class FhirResourceDaoDstu3Test extends BaseJpaDstu3Test {
 		try {
 			myEncounterDao.read(outcome.getId(), mySrd);
 			fail();
-		} catch (IllegalArgumentException e) {
+		} catch (InvalidRequestException e) {
 			// expected
 		}
 		try {

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/r4/BaseJpaR4Test.java

@@ -329,8 +329,7 @@ public abstract class BaseJpaR4Test extends BaseJpaTest {
 
 	@Before
 	@Transactional()
-	public void beforePurgeDatabase() throws InterruptedException {
+	public void beforePurgeDatabase() {
-		final EntityManager entityManager = this.myEntityManager;
 		purgeDatabase(myDaoConfig, mySystemDao, myResourceReindexingSvc, mySearchCoordinatorSvc, mySearchParamRegistry);
 	}
 

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/r4/FhirResourceDaoR4CreateTest.java

@@ -4,6 +4,7 @@ import ca.uhn.fhir.jpa.dao.DaoConfig;
 import ca.uhn.fhir.jpa.searchparam.SearchParameterMap;
 import ca.uhn.fhir.rest.param.StringParam;
 import ca.uhn.fhir.rest.server.exceptions.ResourceNotFoundException;
+import ca.uhn.fhir.rest.server.exceptions.ResourceVersionConflictException;
 import ca.uhn.fhir.util.TestUtil;
 import org.apache.commons.lang3.time.DateUtils;
 import org.hl7.fhir.instance.model.api.IIdType;
@@ -136,7 +137,7 @@ public class FhirResourceDaoR4CreateTest extends BaseJpaR4Test {
 		try {
 			myPatientDao.create(p).getId();
 			fail();
-		} catch (DataIntegrityViolationException e) {
+		} catch (ResourceVersionConflictException e) {
 			// good
 		}
 

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/r4/FhirResourceDaoR4Test.java

@@ -2003,7 +2003,7 @@ public class FhirResourceDaoR4Test extends BaseJpaR4Test {
 		try {
 			myEncounterDao.read(outcome.getId(), mySrd);
 			fail();
-		} catch (IllegalArgumentException e) {
+		} catch (InvalidRequestException e) {
 			// expected
 		}
 		try {

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/provider/ResourceProviderDstu2Test.java

@@ -1037,11 +1037,12 @@ public class ResourceProviderDstu2Test extends BaseResourceProviderDstu2Test {
 		obs1.getDevice().setReference(devId1);
 		IIdType obsId1 = myObservationDao.create(obs1, mySrd).getId().toUnqualifiedVersionless();
 
+		IIdType obsId2;
 		Observation obs2 = new Observation();
 		obs2.getSubject().setReference(ptId1);
 		obs2.getCode().addCoding().setCode("CODE2");
 		obs2.setValue(new StringDt("obsvalue2"));
-		IIdType obsId2 = myObservationDao.create(obs2, mySrd).getId().toUnqualifiedVersionless();
+		obsId2 = myObservationDao.create(obs2, mySrd).getId().toUnqualifiedVersionless();
 
 		Observation obs3 = new Observation();
 		obs3.getSubject().setReference(ptId2);
@@ -1057,17 +1058,15 @@ public class ResourceProviderDstu2Test extends BaseResourceProviderDstu2Test {
 		param = new StringAndListParam();
 		param.addAnd(new StringOrListParam().addOr(new StringParam("obsvalue1")));
 
-		//@formatter:off
 		Parameters response = ourClient
 			.operation()
 			.onInstance(ptId1)
 			.named("everything")
 			.withParameter(Parameters.class, Constants.PARAM_CONTENT, new StringDt("obsvalue1"))
 			.execute();
-		//@formatter:on
 
 		actual = toUnqualifiedVersionlessIds((ca.uhn.fhir.model.dstu2.resource.Bundle) response.getParameter().get(0).getResource());
-		assertThat(actual, containsInAnyOrder(ptId1, obsId1, devId1));
+		assertThat(actual.toString(), actual, containsInAnyOrder(ptId1, obsId1, devId1));
 
 	}
 
@@ -1636,10 +1635,17 @@ public class ResourceProviderDstu2Test extends BaseResourceProviderDstu2Test {
 		nextUrl = response.getLink("next").getUrl();
 		response = ourClient.fetchResourceFromUrl(ca.uhn.fhir.model.dstu2.resource.Bundle.class, nextUrl);
 
+		assertEquals(1, response.getEntry().size());
+//		assertEquals(21, response.getTotal().intValue());
+//		assertEquals(null, response.getLink("next"));
+
+		// Again
+
+		response = ourClient.fetchResourceFromUrl(ca.uhn.fhir.model.dstu2.resource.Bundle.class, nextUrl);
+
 		assertEquals(1, response.getEntry().size());
 		assertEquals(21, response.getTotal().intValue());
 		assertEquals(null, response.getLink("next"));
-
 	}
 
 	@Test
@@ -2087,7 +2093,7 @@ public class ResourceProviderDstu2Test extends BaseResourceProviderDstu2Test {
 		IOUtils.closeQuietly(response.getEntity().getContent());
 		ourLog.info(resp);
 		ca.uhn.fhir.model.dstu2.resource.Bundle bundle = myFhirCtx.newXmlParser().parseResource(ca.uhn.fhir.model.dstu2.resource.Bundle.class, resp);
-		matches = bundle.getTotal();
+		matches = bundle.getEntry().size();
 
 		assertThat(matches, greaterThan(0));
 	}

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/provider/r4/GraphQLProviderR4Test.java

@@ -56,7 +56,7 @@ public class GraphQLProviderR4Test extends BaseResourceProviderR4Test {
 		try {
 			String resp = IOUtils.toString(response.getEntity().getContent(), StandardCharsets.UTF_8);
 			ourLog.info(resp);
-			assertEquals(TestUtil.stripReturns(resp), TestUtil.stripReturns("{\n" +
+			assertEquals(TestUtil.stripReturns("{\n" +
 				"  \"PatientList\":[{\n" +
 				"    \"name\":[{\n" +
 				"      \"family\":\"FAM\",\n" +
@@ -69,7 +69,7 @@ public class GraphQLProviderR4Test extends BaseResourceProviderR4Test {
 				"      \"given\":[\"GivenOnlyB1\",\"GivenOnlyB2\"]\n" +
 				"    }]\n" +
 				"  }]\n" +
-				"}"));
+				"}"), TestUtil.stripReturns(resp));
 		} finally {
 			IOUtils.closeQuietly(response);
 		}

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/provider/r4/ResourceProviderR4Test.java

@@ -158,6 +158,35 @@ public class ResourceProviderR4Test extends BaseResourceProviderR4Test {
 
 
 
+	@Test
+	public void testManualPagingLinkOffsetDoesntReturnBeyondEnd() {
+		myDaoConfig.setSearchPreFetchThresholds(Lists.newArrayList(10, 1000));
+
+		for (int i = 0; i < 50; i++) {
+			Organization o = new Organization();
+			o.setId("O" + i);
+			o.setName("O" + i);
+			ourClient.update().resource(o).execute().getId().toUnqualifiedVersionless();
+		}
+
+		Bundle output = ourClient
+			.search()
+			.forResource("Organization")
+			.count(3)
+			.returnBundle(Bundle.class)
+			.execute();
+
+		ourLog.info(myFhirCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(output));
+
+		String linkNext = output.getLink("next").getUrl();
+		linkNext = linkNext.replaceAll("_getpagesoffset=[0-9]+", "_getpagesoffset=3300");
+		assertThat(linkNext, containsString("_getpagesoffset=3300"));
+
+		Bundle nextPageBundle = ourClient.loadPage().byUrl(linkNext).andReturnBundle(Bundle.class).execute();
+		ourLog.info(myFhirCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(nextPageBundle));
+		assertEquals(null, nextPageBundle.getLink("next"));
+	}
+
 	@Test
 	public void testSearchLinksWorkWithIncludes() {
 		for (int i = 0; i < 5; i++) {
@@ -200,35 +229,6 @@ public class ResourceProviderR4Test extends BaseResourceProviderR4Test {
 
 	}
 
-	@Test
-	@Ignore
-	public void testManualPagingLinkOffsetDoesntReturnBeyondEnd() {
-		myDaoConfig.setSearchPreFetchThresholds(Lists.newArrayList(10, 1000));
-
-		for (int i = 0; i < 50; i++) {
-			Organization o = new Organization();
-			o.setId("O" + i);
-			o.setName("O" + i);
-			ourClient.update().resource(o).execute().getId().toUnqualifiedVersionless();
-		}
-
-		Bundle output = ourClient
-			.search()
-			.forResource("Organization")
-			.count(3)
-			.returnBundle(Bundle.class)
-			.execute();
-
-		ourLog.info(myFhirCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(output));
-
-		String linkNext = output.getLink("next").getUrl();
-		linkNext = linkNext.replaceAll("_getpagesoffset=[0-9]+", "_getpagesoffset=3300");
-		assertThat(linkNext, containsString("_getpagesoffset=3300"));
-
-		Bundle nextPageBundle = ourClient.loadPage().byUrl(linkNext).andReturnBundle(Bundle.class).execute();
-		ourLog.info(myFhirCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(nextPageBundle));
-		assertEquals(null, nextPageBundle.getLink("next"));
-	}
 
 	@Test
 	public void testSearchFetchPageBeyondEnd() {
@@ -3550,7 +3550,7 @@ public class ResourceProviderR4Test extends BaseResourceProviderR4Test {
 		response.getEntity().getContent().close();
 		ourLog.info(resp);
 		Bundle bundle = myFhirCtx.newXmlParser().parseResource(Bundle.class, resp);
-		matches = bundle.getTotal();
+		matches = bundle.getEntry().size();
 
 		assertThat(matches, greaterThan(0));
 	}

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/search/SearchCoordinatorSvcImplTest.java

@@ -449,6 +449,7 @@ public class SearchCoordinatorSvcImplTest {
 		public int getSkippedCount() {
 			return myWrap.getSkippedCount();
 		}
+
 	}
 
 	public static class ResultIterator extends BaseIterator<Long> implements IResultIterator {

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/stresstest/StressTestR4Test.java

@@ -1,36 +1,64 @@
 package ca.uhn.fhir.jpa.stresstest;
 
+import ca.uhn.fhir.jpa.config.UnregisterScheduledProcessor;
+import ca.uhn.fhir.jpa.dao.DaoConfig;
 import ca.uhn.fhir.jpa.provider.r4.BaseResourceProviderR4Test;
 import ca.uhn.fhir.jpa.searchparam.SearchParameterMap;
 import ca.uhn.fhir.rest.api.Constants;
 import ca.uhn.fhir.rest.api.server.IBundleProvider;
+import ca.uhn.fhir.rest.param.TokenOrListParam;
+import ca.uhn.fhir.rest.server.IPagingProvider;
+import ca.uhn.fhir.rest.server.exceptions.ResourceVersionConflictException;
 import ca.uhn.fhir.rest.server.interceptor.RequestValidatingInterceptor;
 import ca.uhn.fhir.util.StopWatch;
 import ca.uhn.fhir.util.TestUtil;
 import com.google.common.base.Charsets;
 import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 import org.apache.commons.io.IOUtils;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
+import org.hamcrest.Matchers;
+import org.hl7.fhir.instance.model.api.IBaseResource;
+import org.hl7.fhir.instance.model.api.IIdType;
 import org.hl7.fhir.r4.hapi.validation.FhirInstanceValidator;
 import org.hl7.fhir.r4.model.*;
 import org.hl7.fhir.r4.model.Bundle.BundleType;
 import org.hl7.fhir.r4.model.Bundle.HTTPVerb;
-import org.hl7.fhir.instance.model.api.IBaseResource;
 import org.junit.After;
 import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.TestPropertySource;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.stream.Collectors;
 
-import static org.junit.Assert.*;
+import static org.apache.commons.lang3.StringUtils.*;
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
 
+@TestPropertySource(properties = {
+	// Since scheduled tasks can cause searches, which messes up the
+	// value returned by SearchBuilder.getLastHandlerMechanismForUnitTest()
+	UnregisterScheduledProcessor.SCHEDULING_DISABLED + "=true"
+})
 public class StressTestR4Test extends BaseResourceProviderR4Test {
 
 	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(StressTestR4Test.class);
 	private RequestValidatingInterceptor myRequestValidatingInterceptor;
+	@Autowired
+	private IPagingProvider myPagingProvider;
 
 	@Override
 	@After
@@ -38,6 +66,8 @@ public class StressTestR4Test extends BaseResourceProviderR4Test {
 		super.after();
 
 		ourRestServer.unregisterInterceptor(myRequestValidatingInterceptor);
+		myDaoConfig.setIndexMissingFields(DaoConfig.IndexEnabledEnum.ENABLED);
+
 	}
 
 	@Override
@@ -51,6 +81,113 @@ public class StressTestR4Test extends BaseResourceProviderR4Test {
 		myRequestValidatingInterceptor.addValidatorModule(module);
 	}
 
+	@Test
+	public void testPageThroughLotsOfPages() {
+		myDaoConfig.setIndexMissingFields(DaoConfig.IndexEnabledEnum.DISABLED);
+
+		/*
+		 * This test creates a really huge number of resources to make sure that even large scale
+		 * searches work correctly. 5000 is arbitrary, this test was intended to demonstrate an
+		 * issue that occurred with 1600 resources but I'm using a huge number here just to
+		 * hopefully catch future issues.
+		 */
+		int count = 5000;
+
+
+		Bundle bundle = new Bundle();
+
+		DiagnosticReport dr = new DiagnosticReport();
+		dr.setId(IdType.newRandomUuid());
+		bundle.addEntry().setFullUrl(dr.getId()).setResource(dr).getRequest().setMethod(HTTPVerb.POST).setUrl("DiagnosticReport");
+		for (int i = 0; i < count; i++) {
+			Observation o = new Observation();
+			o.setId("A" + leftPad(Integer.toString(i), 4, '0'));
+			o.setStatus(Observation.ObservationStatus.FINAL);
+			bundle.addEntry().setFullUrl(o.getId()).setResource(o).getRequest().setMethod(HTTPVerb.PUT).setUrl("Observation/A" + i);
+		}
+		StopWatch sw = new StopWatch();
+		ourLog.info("Saving {} resources", bundle.getEntry().size());
+		mySystemDao.transaction(null, bundle);
+		ourLog.info("Saved {} resources in {}", bundle.getEntry().size(), sw.toString());
+
+		// Load from DAOs
+		List<String> ids = new ArrayList<>();
+		Bundle resultBundle = ourClient.search().forResource("Observation").count(100).returnBundle(Bundle.class).execute();
+		int pageIndex = 0;
+		while (true) {
+			ids.addAll(resultBundle.getEntry().stream().map(t -> t.getResource().getIdElement().toUnqualifiedVersionless().getValue()).collect(Collectors.toList()));
+			if (resultBundle.getLink("next") == null) {
+				break;
+			}
+			ourLog.info("Loading page {} - Have {} results: {}", pageIndex++, ids.size(), resultBundle.getLink("next").getUrl());
+			resultBundle = ourClient.loadPage().next(resultBundle).execute();
+		}
+		assertEquals(count, ids.size());
+		assertEquals(count, Sets.newHashSet(ids).size());
+
+		// Load from DAOs
+		ids = new ArrayList<>();
+		SearchParameterMap map = new SearchParameterMap();
+		map.add("status", new TokenOrListParam().add("final").add("aaa")); // add some noise to guarantee we don't reuse a previous query
+		IBundleProvider results = myObservationDao.search(map);
+		for (int i = 0; i <= count; i += 100) {
+			List<IBaseResource> resultsAndIncludes = results.getResources(i, i + 100);
+			ids.addAll(toUnqualifiedVersionlessIdValues(resultsAndIncludes));
+			results = myPagingProvider.retrieveResultList(results.getUuid());
+		}
+		assertEquals(count, ids.size());
+		assertEquals(count, Sets.newHashSet(ids).size());
+
+		// Load from DAOs starting half way through
+		ids = new ArrayList<>();
+		map = new SearchParameterMap();
+		map.add("status", new TokenOrListParam().add("final").add("aaa")); // add some noise to guarantee we don't reuse a previous query
+		results = myObservationDao.search(map);
+		for (int i = 1000; i <= count; i += 100) {
+			List<IBaseResource> resultsAndIncludes = results.getResources(i, i + 100);
+			ids.addAll(toUnqualifiedVersionlessIdValues(resultsAndIncludes));
+			results = myPagingProvider.retrieveResultList(results.getUuid());
+		}
+		assertEquals(count - 1000, ids.size());
+		assertEquals(count - 1000, Sets.newHashSet(ids).size());
+
+	}
+
+	@Test
+	public void testPageThroughLotsOfPages2() {
+		myDaoConfig.setIndexMissingFields(DaoConfig.IndexEnabledEnum.DISABLED);
+
+		Bundle bundle = new Bundle();
+
+		int count = 1603;
+		for (int i = 0; i < count; i++) {
+			Observation o = new Observation();
+			o.setId("A" + leftPad(Integer.toString(i), 4, '0'));
+			o.setStatus(Observation.ObservationStatus.FINAL);
+			bundle.addEntry().setFullUrl(o.getId()).setResource(o).getRequest().setMethod(HTTPVerb.PUT).setUrl("Observation/A" + i);
+		}
+		StopWatch sw = new StopWatch();
+		ourLog.info("Saving {} resources", bundle.getEntry().size());
+		mySystemDao.transaction(null, bundle);
+		ourLog.info("Saved {} resources in {}", bundle.getEntry().size(), sw.toString());
+
+		// Load from DAOs
+		List<String> ids = new ArrayList<>();
+		Bundle resultBundle = ourClient.search().forResource("Observation").count(300).returnBundle(Bundle.class).execute();
+		int pageIndex = 0;
+		while (true) {
+			ids.addAll(resultBundle.getEntry().stream().map(t -> t.getResource().getIdElement().toUnqualifiedVersionless().getValue()).collect(Collectors.toList()));
+			if (resultBundle.getLink("next") == null) {
+				break;
+			}
+			ourLog.info("Loading page {} - Have {} results: {}", pageIndex++, ids.size(), resultBundle.getLink("next").getUrl());
+			resultBundle = ourClient.loadPage().next(resultBundle).execute();
+		}
+		assertEquals(count, ids.size());
+		assertEquals(count, Sets.newHashSet(ids).size());
+
+	}
+
 	@Test
 	public void testSearchWithLargeNumberOfIncludes() {
 
@@ -100,7 +237,6 @@ public class StressTestR4Test extends BaseResourceProviderR4Test {
 	}
 
 
-
 	@Test
 	public void testMultithreadedSearch() throws Exception {
 		Bundle input = new Bundle();
@@ -130,6 +266,103 @@ public class StressTestR4Test extends BaseResourceProviderR4Test {
 
 	}
 
+	@Test
+	public void testMultiThreadedCreateWithDuplicateClientAssignedIdsInTransaction() throws Exception {
+		ExecutorService executor = Executors.newFixedThreadPool(20);
+
+		List<Future<String>> futures = new ArrayList<>();
+		for (int i = 0; i < 100; i++) {
+
+			int finalI = i;
+
+			Callable<String> task = () -> {
+				Bundle input = new Bundle();
+				input.setType(BundleType.TRANSACTION);
+
+				Patient p = new Patient();
+				p.setId("A" + finalI);
+				p.addIdentifier().setValue("A"+finalI);
+				input.addEntry().setResource(p).setFullUrl("Patient/A" + finalI).getRequest().setMethod(HTTPVerb.PUT).setUrl("Patient/A" + finalI);
+
+				try {
+					ourClient.transaction().withBundle(input).execute();
+					return null;
+				} catch (ResourceVersionConflictException e) {
+					assertThat(e.toString(), containsString("Error flushing transaction with resource types: [Patient] - The operation has failed with a client-assigned ID constraint failure"));
+					return e.toString();
+				}
+			};
+			for (int j = 0; j < 2; j++) {
+				Future<String> future = executor.submit(task);
+				futures.add(future);
+			}
+
+		}
+
+		List<String> results = new ArrayList<>();
+		for (Future<String> next : futures) {
+			String nextOutcome = next.get();
+			if (isNotBlank(nextOutcome)) {
+				results.add(nextOutcome);
+			}
+		}
+
+		ourLog.info("Results: {}", results);
+		assertThat(results, not(Matchers.empty()));
+		assertThat(results.get(0), containsString("HTTP 409 Conflict: Error flushing transaction with resource types: [Patient]"));
+	}
+
+	@Test
+	public void testMultiThreadedUpdateSameResourceInTransaction() throws Exception {
+
+		Patient p = new Patient();
+		p.setActive(true);
+		IIdType id = myPatientDao.create(p).getId().toUnqualifiedVersionless();
+
+		ExecutorService executor = Executors.newFixedThreadPool(20);
+
+		List<Future<String>> futures = new ArrayList<>();
+		for (int i = 0; i < 100; i++) {
+
+			int finalI = i;
+
+			Callable<String> task = () -> {
+				Bundle input = new Bundle();
+				input.setType(BundleType.TRANSACTION);
+
+				Patient updatePatient = new Patient();
+				updatePatient.setId(id);
+				updatePatient.addIdentifier().setValue("A"+finalI);
+				input.addEntry().setResource(updatePatient).setFullUrl(updatePatient.getId()).getRequest().setMethod(HTTPVerb.PUT).setUrl(updatePatient.getId());
+
+				try {
+					ourClient.transaction().withBundle(input).execute();
+					return null;
+				} catch (ResourceVersionConflictException e) {
+					assertThat(e.toString(), containsString("Error flushing transaction with resource types: [Patient] - The operation has failed with a version constraint failure. This generally means that two clients/threads were trying to update the same resource at the same time, and this request was chosen as the failing request."));
+					return e.toString();
+				}
+			};
+			for (int j = 0; j < 2; j++) {
+				Future<String> future = executor.submit(task);
+				futures.add(future);
+			}
+
+		}
+
+		List<String> results = new ArrayList<>();
+		for (Future<String> next : futures) {
+			String nextOutcome = next.get();
+			if (isNotBlank(nextOutcome)) {
+				results.add(nextOutcome);
+			}
+		}
+
+		ourLog.info("Results: {}", results);
+		assertThat(results, not(Matchers.empty()));
+		assertThat(results.get(0), containsString("HTTP 409 Conflict: Error flushing transaction with resource types: [Patient]"));
+	}
+
 	/**
 	 * This test prevents a deadlock that was detected with a large number of
 	 * threads creating resources and blocking on the searchparamcache refreshing
@@ -191,11 +424,6 @@ public class StressTestR4Test extends BaseResourceProviderR4Test {
 		ourLog.info("Loaded {} searches", total);
 	}
 
-	@AfterClass
-	public static void afterClassClearContext() {
-		TestUtil.clearAllStaticFieldsForUnitTest();
-	}
-
 	public class BaseTask extends Thread {
 		protected Throwable myError;
 		protected int myTaskCount = 0;
@@ -280,5 +508,10 @@ public class StressTestR4Test extends BaseResourceProviderR4Test {
 		}
 	}
 
+	@AfterClass
+	public static void afterClassClearContext() {
+		TestUtil.clearAllStaticFieldsForUnitTest();
+	}
+
 
 }

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ForcedId.java

@@ -27,7 +27,7 @@ import javax.persistence.*;
 @Entity()
 @Table(name = "HFJ_FORCED_ID", uniqueConstraints = {
 	@UniqueConstraint(name = "IDX_FORCEDID_RESID", columnNames = {"RESOURCE_PID"}),
-	@UniqueConstraint(name = "IDX_FORCEDID_TYPE_FID", columnNames = {"RESOURCE_TYPE", "FORCED_ID"})
+	@UniqueConstraint(name = ForcedId.IDX_FORCEDID_TYPE_FID, columnNames = {"RESOURCE_TYPE", "FORCED_ID"})
 }, indexes = {
 	/*
 	 * NB: We previously had indexes named
@@ -39,6 +39,7 @@ import javax.persistence.*;
 public class ForcedId {
 
 	public static final int MAX_FORCED_ID_LENGTH = 100;
+	public static final String IDX_FORCEDID_TYPE_FID = "IDX_FORCEDID_TYPE_FID";
 
 	@Column(name = "FORCED_ID", nullable = false, length = MAX_FORCED_ID_LENGTH, updatable = false)
 	private String myForcedId;

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamNumber.java

@@ -33,6 +33,7 @@ import org.hibernate.search.annotations.NumericField;
 
 import javax.persistence.*;
 import java.math.BigDecimal;
+import java.util.Objects;
 
 @Embeddable
 @Entity
@@ -162,7 +163,7 @@ public class ResourceIndexedSearchParamNumber extends BaseResourceIndexedSearchP
 			return false;
 		}
 		NumberParam number = (NumberParam) theParam;
-		return getValue().equals(number.getValue());
+		return Objects.equals(getValue(), number.getValue());
 	}
 
 }

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamQuantity.java

@@ -33,6 +33,9 @@ import org.hibernate.search.annotations.NumericField;
 
 import javax.persistence.*;
 import java.math.BigDecimal;
+import java.util.Objects;
+
+import static org.apache.commons.lang3.StringUtils.defaultString;
 
 //@formatter:off
 @Embeddable
@@ -242,27 +245,31 @@ public class ResourceIndexedSearchParamQuantity extends BaseResourceIndexedSearc
 		boolean retval = false;
 
 		// Only match on system if it wasn't specified
-		if (quantity.getSystem() == null && quantity.getUnits() == null) {
+		String quantityUnitsString = defaultString(quantity.getUnits());
-			if (getValue().equals(quantity.getValue())) {
+		if (quantity.getSystem() == null && quantityUnitsString == null) {
+			if (Objects.equals(getValue(),quantity.getValue())) {
 				retval = true;
 			}
-		} else if (quantity.getSystem() == null) {
+		} else {
-			if (getUnits().equalsIgnoreCase(quantity.getUnits()) &&
+			String unitsString = defaultString(getUnits());
-				getValue().equals(quantity.getValue())) {
+			if (quantity.getSystem() == null) {
+				if (unitsString.equalsIgnoreCase(quantityUnitsString) &&
+					Objects.equals(getValue(),quantity.getValue())) {
 					retval = true;
 				}
-		} else if (quantity.getUnits() == null) {
+			} else if (quantityUnitsString == null) {
 				if (getSystem().equalsIgnoreCase(quantity.getSystem()) &&
-				getValue().equals(quantity.getValue())) {
+					Objects.equals(getValue(),quantity.getValue())) {
 					retval = true;
 				}
 			} else {
 				if (getSystem().equalsIgnoreCase(quantity.getSystem()) &&
-				getUnits().equalsIgnoreCase(quantity.getUnits()) &&
+					unitsString.equalsIgnoreCase(quantityUnitsString) &&
-				getValue().equals(quantity.getValue())) {
+					Objects.equals(getValue(),quantity.getValue())) {
 					retval = true;
 				}
 			}
+		}
 		return retval;
 	}
 

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamString.java

@@ -33,6 +33,7 @@ import org.hibernate.search.annotations.*;
 import javax.persistence.Index;
 import javax.persistence.*;
 
+import static org.apache.commons.lang3.StringUtils.defaultString;
 import static org.apache.commons.lang3.StringUtils.left;
 
 //@formatter:off
@@ -243,7 +244,7 @@ public class ResourceIndexedSearchParamString extends BaseResourceIndexedSearchP
 	}
 
 	public void setValueExact(String theValueExact) {
-		if (StringUtils.defaultString(theValueExact).length() > MAX_LENGTH) {
+		if (defaultString(theValueExact).length() > MAX_LENGTH) {
 			throw new IllegalArgumentException("Value is too long: " + theValueExact.length());
 		}
 		myValueExact = theValueExact;
@@ -254,7 +255,7 @@ public class ResourceIndexedSearchParamString extends BaseResourceIndexedSearchP
 	}
 
 	public void setValueNormalized(String theValueNormalized) {
-		if (StringUtils.defaultString(theValueNormalized).length() > MAX_LENGTH) {
+		if (defaultString(theValueNormalized).length() > MAX_LENGTH) {
 			throw new IllegalArgumentException("Value is too long: " + theValueNormalized.length());
 		}
 		myValueNormalized = theValueNormalized;
@@ -313,7 +314,7 @@ public class ResourceIndexedSearchParamString extends BaseResourceIndexedSearchP
 			return false;
 		}
 		StringParam string = (StringParam)theParam;
-		String normalizedString = StringNormalizer.normalizeString(string.getValue());
+		String normalizedString = StringNormalizer.normalizeString(defaultString(string.getValue()));
-		return getValueNormalized().startsWith(normalizedString);
+		return defaultString(getValueNormalized()).startsWith(normalizedString);
 	}
 }

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamToken.java

@@ -252,18 +252,21 @@ public class ResourceIndexedSearchParamToken extends BaseResourceIndexedSearchPa
 		}
 		TokenParam token = (TokenParam) theParam;
 		boolean retval = false;
+		String valueString = defaultString(getValue());
+		String tokenValueString = defaultString(token.getValue());
+
 		// Only match on system if it wasn't specified
 		if (token.getSystem() == null || token.getSystem().isEmpty()) {
-			if (getValue().equalsIgnoreCase(token.getValue())) {
+			if (valueString.equalsIgnoreCase(tokenValueString)) {
 				retval = true;
 			}
-		} else if (token.getValue() == null || token.getValue().isEmpty()) {
+		} else if (tokenValueString == null || tokenValueString.isEmpty()) {
 			if (token.getSystem().equalsIgnoreCase(getSystem())) {
 				retval = true;
 			}
 		} else {
 			if (token.getSystem().equalsIgnoreCase(getSystem()) &&
-				getValue().equalsIgnoreCase(token.getValue())) {
+				valueString.equalsIgnoreCase(tokenValueString)) {
 				retval = true;
 			}
 		}

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamUri.java

@@ -30,6 +30,8 @@ import org.hibernate.search.annotations.Field;
 
 import javax.persistence.*;
 
+import static org.apache.commons.lang3.StringUtils.defaultString;
+
 @Embeddable
 @Entity
 @Table(name = "HFJ_SPIDX_URI", indexes = {
@@ -188,7 +190,7 @@ public class ResourceIndexedSearchParamUri extends BaseResourceIndexedSearchPara
 			return false;
 		}
 		UriParam uri = (UriParam) theParam;
-		return getUri().equalsIgnoreCase(uri.getValueNotNull());
+		return defaultString(getUri()).equalsIgnoreCase(uri.getValueNotNull());
 	}
 
 	public static long calculateHashUri(String theResourceType, String theParamName, String theUri) {

hapi-fhir-jpaserver-subscription/src/test/java/ca/uhn/fhir/jpa/subscription/module/matcher/InMemorySubscriptionMatcherTestR3.java

@@ -558,4 +558,24 @@ public class InMemorySubscriptionMatcherTestR3 extends BaseSubscriptionDstu3Test
 		cr.getRequester().getAgent().setReference("Organization/O1276");
 		assertMatched(cr, criteria);
 	}
+
+	@Test
+	public void testSystemWithNullValue() {
+		String criteria = "Observation?code=17861-6";
+		Observation observation = new Observation();
+		CodeableConcept code = new CodeableConcept();
+		observation.getCode().addCoding().setSystem("http://loinc.org");
+
+		assertNotMatched(observation, criteria);
+	}
+
+	@Test
+	public void testNullSystemNotNullValue() {
+		String criteria = "Observation?code=17861-6";
+		Observation observation = new Observation();
+		CodeableConcept code = new CodeableConcept();
+		observation.getCode().addCoding().setCode("look ma no system");
+
+		assertNotMatched(observation, criteria);
+	}
 }

src/changes/changes.xml

@@ -48,6 +48,16 @@
 				using the string name of the datatype (e.g. "dateTime") in order to help
 				building Parameters resources in a version-independent way.
 			</action>
+			<action type="fix">
+				When performing a search using the JPA server, if a search returned between 1500
+				and 2000 results, a query for the final page of results would timeout due to
+				a page calculation error. This has been corrected.
+			</action>
+			<action type="add">
+				In the JPA server, a much more readable error message is now returned returned when 
+				two client threads collide while trying to simultaneously create a resource with the
+				same client-assigned ID. In addition, better error messages are now returned
+				when conflicts such as this one are hit within a FHIR transaction operation.
 			<action type="add">
 				The JPA query builder has been optimized to take better advantage of SQL IN (..) expressions
 				when performing token searches with multiple OR values.