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NIFI-3905: This closes #1805. When a Provenance Query is submitted to WriteAheadProvenanceRepository, purge any obsolete queries from the internal state before rejecting the query due to 'too many outstanding queries' 

Signed-off-by: joewitt <joewitt@apache.org>
This commit is contained in:
Mark Payne 2017-05-16 10:06:51 -04:00 committed by joewitt
parent 58cf15a912
commit 4fdea680ec
1 changed files with 28 additions and 28 deletions
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56
nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/index/lucene/LuceneEventIndex.java
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@ -154,7 +154,7 @@ public class LuceneEventIndex implements EventIndex {
maintenanceExecutor = Executors.newScheduledThreadPool(1, new NamedThreadFactory("Provenance Repository Maintenance"));
maintenanceExecutor.scheduleWithFixedDelay(() -> performMaintenance(), 1, 1, TimeUnit.MINUTES);
maintenanceExecutor.scheduleWithFixedDelay(new RemoveExpiredQueryResults(), 30, 30, TimeUnit.SECONDS);
maintenanceExecutor.scheduleWithFixedDelay(this::purgeObsoleteQueries, 30, 30, TimeUnit.SECONDS);
cachedQueries.add(new LatestEventsQuery());
cachedQueries.add(new LatestEventsPerProcessorQuery());
@ -633,8 +633,11 @@ public class LuceneEventIndex implements EventIndex {
private void validate(final Query query) {
final int numQueries = querySubmissionMap.size();
if (numQueries > MAX_UNDELETED_QUERY_RESULTS) {
throw new IllegalStateException("Cannot process query because there are currently " + numQueries + " queries whose results have not "
+ "been deleted due to poorly behaving clients not issuing DELETE requests. Please try again later.");
purgeObsoleteQueries();
if (querySubmissionMap.size() > MAX_UNDELETED_QUERY_RESULTS) {
throw new IllegalStateException("Cannot process query because there are currently " + numQueries + " queries whose results have not "
+ "been deleted due to poorly behaving clients not issuing DELETE requests. Please try again later.");
}
}
if (query.getEndDate() != null && query.getStartDate() != null && query.getStartDate().getTime() > query.getEndDate().getTime()) {
@ -702,35 +705,32 @@ public class LuceneEventIndex implements EventIndex {
return removed;
}
private class RemoveExpiredQueryResults implements Runnable {
@Override
public void run() {
try {
final Date now = new Date();
private void purgeObsoleteQueries() {
try {
final Date now = new Date();
final Iterator<Map.Entry<String, AsyncQuerySubmission>> queryIterator = querySubmissionMap.entrySet().iterator();
while (queryIterator.hasNext()) {
final Map.Entry<String, AsyncQuerySubmission> entry = queryIterator.next();
final Iterator<Map.Entry<String, AsyncQuerySubmission>> queryIterator = querySubmissionMap.entrySet().iterator();
while (queryIterator.hasNext()) {
final Map.Entry<String, AsyncQuerySubmission> entry = queryIterator.next();
final StandardQueryResult result = entry.getValue().getResult();
if (entry.getValue().isCanceled() || result.isFinished() && result.getExpiration().before(now)) {
queryIterator.remove();
}
final StandardQueryResult result = entry.getValue().getResult();
if (entry.getValue().isCanceled() || result.isFinished() && result.getExpiration().before(now)) {
queryIterator.remove();
}
final Iterator<Map.Entry<String, AsyncLineageSubmission>> lineageIterator = lineageSubmissionMap.entrySet().iterator();
while (lineageIterator.hasNext()) {
final Map.Entry<String, AsyncLineageSubmission> entry = lineageIterator.next();
final StandardLineageResult result = entry.getValue().getResult();
if (entry.getValue().isCanceled() || result.isFinished() && result.getExpiration().before(now)) {
lineageIterator.remove();
}
}
} catch (final Exception e) {
logger.error("Failed to expire Provenance Query Results due to {}", e.toString());
logger.error("", e);
}
final Iterator<Map.Entry<String, AsyncLineageSubmission>> lineageIterator = lineageSubmissionMap.entrySet().iterator();
while (lineageIterator.hasNext()) {
final Map.Entry<String, AsyncLineageSubmission> entry = lineageIterator.next();
final StandardLineageResult result = entry.getValue().getResult();
if (entry.getValue().isCanceled() || result.isFinished() && result.getExpiration().before(now)) {
lineageIterator.remove();
}
}
} catch (final Exception e) {
logger.error("Failed to expire Provenance Query Results due to {}", e.toString());
logger.error("", e);
}
}
}