[OAK-4436] HeavyWriteIT sporadically fails

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: Segment Tar 0.0.2, 1.6.0
• Component/s: segment-tar
• Labels: gc
• Epic Link: SegmentMK revision GC
• Assignee: Michael Dürig
• Reporter: Michael Dürig
• Created: 07/Jun/16 08:19
• Updated: 27/Jun/16 08:21
• Resolved: 07/Jun/16 15:52

Description

I've seen HeavyWriteIT fail sporadically on my local checkout.

3d13e2927fc0d75454a692ef5c8703880dc2ea0d
org.apache.jackrabbit.oak.segment.SegmentNotFoundException: Segment 31b75992-aaf7-4f2b-a5de-b5a268c1fdb3 not found

	at org.apache.jackrabbit.oak.segment.file.FileStore$14.call(FileStore.java:1377)
	at org.apache.jackrabbit.oak.segment.file.FileStore$14.call(FileStore.java:1317)
	at org.apache.jackrabbit.oak.cache.CacheLIRS$Segment.load(CacheLIRS.java:1011)
	at org.apache.jackrabbit.oak.cache.CacheLIRS$Segment.get(CacheLIRS.java:972)
	at org.apache.jackrabbit.oak.cache.CacheLIRS.get(CacheLIRS.java:283)
	at org.apache.jackrabbit.oak.segment.SegmentCache.geSegment(SegmentCache.java:80)
	at org.apache.jackrabbit.oak.segment.file.FileStore.readSegment(FileStore.java:1317)
	at org.apache.jackrabbit.oak.segment.SegmentId.getSegment(SegmentId.java:111)
	at org.apache.jackrabbit.oak.segment.RecordId.getSegment(RecordId.java:94)
	at org.apache.jackrabbit.oak.segment.SegmentWriter$SegmentWriteOperation.isOldGeneration(SegmentWriter.java:1010)
	at org.apache.jackrabbit.oak.segment.SegmentWriter$SegmentWriteOperation.writeNodeUncached(SegmentWriter.java:906)
	at org.apache.jackrabbit.oak.segment.SegmentWriter$SegmentWriteOperation.writeNode(SegmentWriter.java:885)
	at org.apache.jackrabbit.oak.segment.SegmentWriter$SegmentWriteOperation.access$700(SegmentWriter.java:319)
	at org.apache.jackrabbit.oak.segment.SegmentWriter$8.execute(SegmentWriter.java:277)
	at org.apache.jackrabbit.oak.segment.SegmentBufferWriterPool.execute(SegmentBufferWriterPool.java:110)
	at org.apache.jackrabbit.oak.segment.SegmentWriter.writeNode(SegmentWriter.java:274)
	at org.apache.jackrabbit.oak.segment.SegmentNodeBuilder.getNodeState(SegmentNodeBuilder.java:111)
	at org.apache.jackrabbit.oak.segment.SegmentNodeStore$Commit.<init>(SegmentNodeStore.java:516)
	at org.apache.jackrabbit.oak.segment.SegmentNodeStore.merge(SegmentNodeStore.java:284)
	at org.apache.jackrabbit.oak.segment.HeavyWriteIT.heavyWrite(HeavyWriteIT.java:91)

I suspect this is a problem with isOldGeneration itself not being prepared for the old segment actually being gone.