[OAK-6635] IndexReader closed exception in DocumentQueue

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.6.5
• Fix Version/s: 1.7.8, 1.6.6, 1.8.0
• Component/s: lucene
• Assignee: Chetan Mehrotra
• Reporter: Chetan Mehrotra
• Created: 07/Sep/17 13:50
• Updated: 26/Oct/17 04:28
• Resolved: 22/Sep/17 10:06

Description

Even after fix for OAK-6572 following exception is being seen in some cases

05.09.2017 23:06:15.489 *ERROR* [oak-lucene-3] org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.DocumentQueue Uncaught exception
org.apache.lucene.store.AlreadyClosedException: this IndexReader is closed
	at org.apache.lucene.index.IndexReader.decRef(IndexReader.java:233)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexNodeManager.decrementSearcherUsageCount(IndexNodeManager.java:255)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexNodeManager.access$400(IndexNodeManager.java:52)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexNodeManager$IndexNodeImpl.release(IndexNodeManager.java:286)
	at org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.DocumentQueue.processDocs(DocumentQueue.java:275)
	at org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.DocumentQueue.addDocsToIndex(DocumentQueue.java:214)
	at org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.DocumentQueue.access$500(DocumentQueue.java:55)
	at org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.DocumentQueue$2$1.call(DocumentQueue.java:121)
	at org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.DocumentQueue$2$1.call(DocumentQueue.java:96)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

This also causes the lock to be not released prevent async index from further updates

Issue Links

• is broken by: OAK-6500 NRTIndex leaks file handles due to unclosed IndexReader
• is related to: OAK-6500 NRTIndex leaks file handles due to unclosed IndexReader
• is related to: OAK-6777 IndexReader closed exception in previous reader
• is related to: OAK-6637 Release IndexNode lock in finally clause
• relates to: OAK-6572 IndexReaderClosed exception seen after some run
• relates to: OAK-6693 Ensure that IndexNodeManager releases lock in case of error in acquiring it