[OAK-3062] VersionGC failing on Mongo with CursorNotFoundException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.17, 1.2.3, 1.3.2, 1.4
• Component/s: mongomk
• Assignee: Chetan Mehrotra
• Reporter: Chetan Mehrotra
• Created: 01/Jul/15 10:37
• Updated: 02/Mar/16 11:45
• Resolved: 01/Jul/15 11:27

Description

At times the VersionGC on big repository fails with following exception

30.06.2015 03:55:59.253 *INFO* [pool-7-thread-132] org.apache.jackrabbit.oak.plugins.document.VersionGarbageCollector Iterated through 440000 documents so far. 410668 found to be deleted
com.mongodb.MongoException$CursorNotFound: Cursor 78740863820 not found on server mongoserver:27017
	at com.mongodb.QueryResultIterator.throwOnQueryFailure(QueryResultIterator.java:218)
	at com.mongodb.QueryResultIterator.init(QueryResultIterator.java:198)
	at com.mongodb.QueryResultIterator.initFromQueryResponse(QueryResultIterator.java:176)
	at com.mongodb.QueryResultIterator.getMore(QueryResultIterator.java:141)
	at com.mongodb.QueryResultIterator.hasNext(QueryResultIterator.java:127)
	at com.mongodb.DBCursor._hasNext(DBCursor.java:551)
	at com.mongodb.DBCursor.hasNext(DBCursor.java:571)
	at com.google.common.collect.TransformedIterator.hasNext(TransformedIterator.java:43)
	at org.apache.jackrabbit.oak.plugins.document.VersionGarbageCollector.collectDeletedDocuments(VersionGarbageCollector.java:110)
	at org.apache.jackrabbit.oak.plugins.document.VersionGarbageCollector.gc(VersionGarbageCollector.java:85)
	at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService$2.run(DocumentNodeStoreService.java:503)
	at org.apache.jackrabbit.oak.spi.state.RevisionGC$1.call(RevisionGC.java:68)
	at org.apache.jackrabbit.oak.spi.state.RevisionGC$1.call(RevisionGC.java:64)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

Issue Links

• is related to: OAK-3070 Use a lower bound in VersionGC query to avoid checking unmodified once deleted docs