SOLR-15085 Prevent EmbeddedSolrServer calling shutdown on a CoreContainer that was passed to it

solr/CHANGES.txt

@@ -210,6 +210,8 @@ Improvements
 ---------------------
 * SOLR-15081: Metrics for a core: add SolrCloud "isLeader" and "replicaState".  (David Smiley)
 
+* SOLR-15085: Prevent EmbeddedSolrServer calling shutdown on a CoreContainer that was passed to it. (Tim Owen via Mike Drob)
+
 Optimizations
 ---------------------
 * SOLR-15079: Block Collapse - Faster collapse code when groups are co-located via Block Join style nested doc indexing.

solr/core/src/java/org/apache/solr/client/solrj/embedded/EmbeddedSolrServer.java

@@ -71,6 +71,7 @@ public class EmbeddedSolrServer extends SolrClient {
   protected final String coreName;
   private final SolrRequestParsers _parser;
   private final RequestWriterSupplier supplier;
+  private boolean containerIsLocal = false;
 
   public enum RequestWriterSupplier {
     JavaBin(() -> new BinaryRequestWriter()), XML(() -> new RequestWriter());
@@ -94,6 +95,7 @@ public class EmbeddedSolrServer extends SolrClient {
    */
   public EmbeddedSolrServer(Path solrHome, String defaultCoreName) {
     this(load(new CoreContainer(solrHome, new Properties())), defaultCoreName);
+    containerIsLocal = true;
   }
 
   /**
@@ -104,6 +106,7 @@ public class EmbeddedSolrServer extends SolrClient {
    */
   public EmbeddedSolrServer(NodeConfig nodeConfig, String defaultCoreName) {
     this(load(new CoreContainer(nodeConfig)), defaultCoreName);
+    containerIsLocal = true;
   }
 
   private static CoreContainer load(CoreContainer cc) {
@@ -120,9 +123,6 @@ public class EmbeddedSolrServer extends SolrClient {
 
   /**
    * Create an EmbeddedSolrServer wrapping a CoreContainer.
-   * <p>
-   * Note that EmbeddedSolrServer will shutdown the wrapped CoreContainer when
-   * {@link #close()} is called.
    *
    * @param coreContainer the core container
    * @param coreName      the core to route requests to by default (optional)
@@ -133,8 +133,6 @@ public class EmbeddedSolrServer extends SolrClient {
 
   /**
    * Create an EmbeddedSolrServer wrapping a CoreContainer.
-   * <p>
-   * Note that EmbeddedSolrServer will shutdown the wrapped CoreContainer when {@link #close()} is called.
    *
    * @param coreContainer
    *          the core container
@@ -354,12 +352,14 @@ public class EmbeddedSolrServer extends SolrClient {
   }
 
   /**
-   * Shutdown all cores within the EmbeddedSolrServer instance
+   * Closes any resources created by this instance
    */
   @Override
   public void close() throws IOException {
+    if (containerIsLocal) {
       coreContainer.shutdown();
     }
+  }
 
   /**
    * Getter method for the CoreContainer

solr/core/src/java/org/apache/solr/core/CoreContainer.java

@@ -955,12 +955,7 @@ public class CoreContainer {
         name = "localhost";
       }
       cloudManager = null;
-      client = new EmbeddedSolrServer(this, null) {
+      client = new EmbeddedSolrServer(this, null);
-        @Override
-        public void close() throws IOException {
-          // do nothing - we close the container ourselves
-        }
-      };
       // enable local metrics unless specifically set otherwise
       initArgs.putIfAbsent(MetricsHistoryHandler.ENABLE_NODES_PROP, true);
       initArgs.putIfAbsent(MetricsHistoryHandler.ENABLE_REPLICAS_PROP, true);

solr/core/src/test/org/apache/solr/update/processor/AbstractAtomicUpdatesMultivalueTestBase.java

@@ -58,13 +58,7 @@ public abstract class AbstractAtomicUpdatesMultivalueTestBase extends EmbeddedSo
 
   @Override
   public synchronized EmbeddedSolrServer getSolrClient() {
-    return new EmbeddedSolrServer(h.getCoreContainer(), DEFAULT_CORE_NAME, getRequestWriterSupplier()) {
+    return new EmbeddedSolrServer(h.getCoreContainer(), DEFAULT_CORE_NAME, getRequestWriterSupplier());
-
-      @Override
-      public void close() {
-        // do not close core container
-      }
-    };
   }
 
   private static void assertQR(final String fieldName, final String queryValue, final int numFound) {

solr/solr-ref-guide/src/solr-upgrade-notes.adoc

@@ -38,6 +38,17 @@ Detailed steps for upgrading a Solr cluster are in the section <<upgrading-a-sol
 
 If you are upgrading from 7.x, see the section <<Upgrading from 7.x Releases>> below.
 
+=== Solr 8.9
+
+See the https://cwiki.apache.org/confluence/display/SOLR/ReleaseNote89[8.9 Release Notes^]
+for an overview of the main new features of Solr 8.9.
+
+When upgrading to 8.9.x users should be aware of the following major changes from 8.8.
+
+*Embedded Solr Server*
+
+* When using EmbeddedSolrServer, it will no longer close CoreContainer instances that were passed to it.
+
 === Solr 8.8
 
 See the https://cwiki.apache.org/confluence/display/SOLR/ReleaseNote88[8.8 Release Notes^]

solr/solrj/src/test/org/apache/solr/client/solrj/embedded/TestEmbeddedSolrServer.java

@@ -61,10 +61,10 @@ public class TestEmbeddedSolrServer extends AbstractEmbeddedSolrServerTestCase {
 
     solrServer.close();
 
-    Assert.assertEquals(0, cores.getCores().size());
+    Assert.assertEquals(3, cores.getCores().size());
 
     for (SolrCore solrCore : solrCores) {
-      Assert.assertEquals(true, solrCore.isClosed());
+      Assert.assertEquals(false, solrCore.isClosed());
     }
   }
 

solr/solrj/src/test/org/apache/solr/client/solrj/request/json/DirectJsonQueryRequestFacetingEmbeddedTest.java

@@ -75,12 +75,7 @@ public class DirectJsonQueryRequestFacetingEmbeddedTest extends EmbeddedSolrServ
     final String schema = tempSolrHome.getAbsolutePath() + "/" + COLLECTION_NAME + "/conf/managed-schema";
     initCore(config, schema, tempSolrHome.getAbsolutePath(), COLLECTION_NAME);
 
-    client = new EmbeddedSolrServer(h.getCoreContainer(), COLLECTION_NAME) {
+    client = new EmbeddedSolrServer(h.getCoreContainer(), COLLECTION_NAME);
-      @Override
-      public void close() {
-        // do not close core container
-      }
-    };
 
     ContentStreamUpdateRequest up = new ContentStreamUpdateRequest("/update");
     up.setParam("collection", COLLECTION_NAME);

solr/test-framework/src/java/org/apache/solr/EmbeddedSolrServerTestBase.java

@@ -72,12 +72,7 @@ abstract public class EmbeddedSolrServerTestBase extends SolrTestCaseJ4 {
    * Create a new solr client. Subclasses should override for other options.
    */
   public EmbeddedSolrServer createNewSolrClient() {
-    return new EmbeddedSolrServer(h.getCoreContainer(), DEFAULT_CORE_NAME) {
+    return new EmbeddedSolrServer(h.getCoreContainer(), DEFAULT_CORE_NAME);
-      @Override
-      public void close() {
-        // do not close core container
-      }
-    };
   }
 
   public void upload(final String collection, final ContentStream... contents) {