[OAK-6976] CopyOnWriteDirectory_Segment_Test failure

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.4.18
• Component/s: lucene
• Assignee: Chetan Mehrotra
• Reporter: Marcel Reutegger
• Created: 23/Nov/17 08:15
• Updated: 08/Jan/20 13:06
• Resolved: 08/Jan/20 13:05

Description

This test only exists in branches 1.4 and older and was introduced as part of OAK-5238. The test fails every now and then with (stack trace from 1.4):

java.lang.IllegalStateException: This builder does not exist: child-0
	at com.google.common.base.Preconditions.checkState(Preconditions.java:150)
	at org.apache.jackrabbit.oak.plugins.memory.MemoryNodeBuilder.setProperty(MemoryNodeBuilder.java:506)
	at org.apache.jackrabbit.oak.plugins.memory.MemoryNodeBuilder.setProperty(MemoryNodeBuilder.java:515)
	at org.apache.jackrabbit.oak.plugins.index.lucene.CopyOnWriteDirectory_Segment_Test.writeTree(CopyOnWriteDirectory_Segment_Test.java:158)
	at org.apache.jackrabbit.oak.plugins.index.lucene.CopyOnWriteDirectory_Segment_Test.copyOnWrite(CopyOnWriteDirectory_Segment_Test.java:111)

Please note that it fails more likely when the update.limit is set to 100, which is the case for the maven build.

I also ported the test to 1.6 and running it with the new segment-tar looks OK. I don't know if this is because the copy-on-write or the segment-tar implementation is different than in 1.4.

The affected versions are currently only set to 1.4.18, because there were no releases off the 1.2 and 1.0 branches since OAK-5238 was backported.

Issue Links

• relates to: OAK-5238 IndexCopier causes concurrent update on NodeBuilder