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From "Roland Otta (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13445) validation executor thread is stuck
Date Thu, 13 Apr 2017 09:51:41 GMT
Roland Otta created CASSANDRA-13445:
---------------------------------------

             Summary: validation executor thread is stuck
                 Key: CASSANDRA-13445
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13445
             Project: Cassandra
          Issue Type: Bug
          Components: Compaction
         Environment: cassandra 3.10
            Reporter: Roland Otta


we have the following issue on our 3.10 development cluster.

sometimes the repairs (it is a full repair in that case) hang because
of a stuck validation compaction.

nodetool compactionstats says 
a1bb45c0-1fc6-11e7-81de-0fb0b3f5a345 Validation      bds      ad_event
805955242 841258085 bytes 95.80% 
and there is no more progress at this percentage.

i checked the logs on the affected node and could not find any
suspicious errors.

a thread dump shows that the validation executor threads is always repeating stuff in org.apache.cassandra.cache.ChunkCache$CachingRebufferer.rebuffer(ChunkCache.java:235)

here is the full stack trace

{noformat}
com.github.benmanes.caffeine.cache.BoundedLocalCache$$Lambda$64/2098345091.accept(Unknown
Source)
com.github.benmanes.caffeine.cache.BoundedBuffer$RingBuffer.drainTo(BoundedBuffer.java:104)
com.github.benmanes.caffeine.cache.StripedBuffer.drainTo(StripedBuffer.java:160)
com.github.benmanes.caffeine.cache.BoundedLocalCache.drainReadBuffer(BoundedLocalCache.java:964)
com.github.benmanes.caffeine.cache.BoundedLocalCache.maintenance(BoundedLocalCache.java:918)
com.github.benmanes.caffeine.cache.BoundedLocalCache.performCleanUp(BoundedLocalCache.java:903)
com.github.benmanes.caffeine.cache.BoundedLocalCache$PerformCleanupTask.run(BoundedLocalCache.java:2680)
com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:457)
com.github.benmanes.caffeine.cache.BoundedLocalCache.scheduleDrainBuffers(BoundedLocalCache.java:875)
com.github.benmanes.caffeine.cache.BoundedLocalCache.afterRead(BoundedLocalCache.java:748)
com.github.benmanes.caffeine.cache.BoundedLocalCache.computeIfAbsent(BoundedLocalCache.java:1783)
com.github.benmanes.caffeine.cache.LocalCache.computeIfAbsent(LocalCache.java:97)
com.github.benmanes.caffeine.cache.LocalLoadingCache.get(LocalLoadingCache.java:66)
org.apache.cassandra.cache.ChunkCache$CachingRebufferer.rebuffer(ChunkCache.java:235)
org.apache.cassandra.cache.ChunkCache$CachingRebufferer.rebuffer(ChunkCache.java:213)
org.apache.cassandra.io.util.RandomAccessReader.reBufferAt(RandomAccessReader.java:65)
org.apache.cassandra.io.util.RandomAccessReader.reBuffer(RandomAccessReader.java:59)
org.apache.cassandra.io.util.RebufferingInputStream.read(RebufferingInputStream.java:88)
org.apache.cassandra.io.util.RebufferingInputStream.readFully(RebufferingInputStream.java:66)
org.apache.cassandra.io.util.RebufferingInputStream.readFully(RebufferingInputStream.java:60)
org.apache.cassandra.utils.ByteBufferUtil.read(ByteBufferUtil.java:402)
org.apache.cassandra.db.marshal.AbstractType.readValue(AbstractType.java:420)
org.apache.cassandra.db.rows.Cell$Serializer.deserialize(Cell.java:245)
org.apache.cassandra.db.rows.UnfilteredSerializer.readSimpleColumn(UnfilteredSerializer.java:610)
org.apache.cassandra.db.rows.UnfilteredSerializer.lambda$deserializeRowBody$1(UnfilteredSerializer.java:575)
org.apache.cassandra.db.rows.UnfilteredSerializer$$Lambda$84/898489541.accept(Unknown Source)
org.apache.cassandra.utils.btree.BTree.applyForwards(BTree.java:1222)
org.apache.cassandra.utils.btree.BTree.apply(BTree.java:1177)
org.apache.cassandra.db.Columns.apply(Columns.java:377)
org.apache.cassandra.db.rows.UnfilteredSerializer.deserializeRowBody(UnfilteredSerializer.java:571)
org.apache.cassandra.db.rows.UnfilteredSerializer.deserialize(UnfilteredSerializer.java:440)
org.apache.cassandra.io.sstable.SSTableSimpleIterator$CurrentFormatIterator.computeNext(SSTableSimpleIterator.java:95)
org.apache.cassandra.io.sstable.SSTableSimpleIterator$CurrentFormatIterator.computeNext(SSTableSimpleIterator.java:73)
org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
org.apache.cassandra.io.sstable.SSTableIdentityIterator.hasNext(SSTableIdentityIterator.java:122)
org.apache.cassandra.db.rows.LazilyInitializedUnfilteredRowIterator.computeNext(LazilyInitializedUnfilteredRowIterator.java:100)
org.apache.cassandra.db.rows.LazilyInitializedUnfilteredRowIterator.computeNext(LazilyInitializedUnfilteredRowIterator.java:32)
org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
org.apache.cassandra.utils.MergeIterator$Candidate.advance(MergeIterator.java:374)
org.apache.cassandra.utils.MergeIterator$ManyToOne.advance(MergeIterator.java:186)
org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:155)
org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator.computeNext(UnfilteredRowIterators.java:500)
org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator.computeNext(UnfilteredRowIterators.java:360)
org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47)
org.apache.cassandra.db.transform.BaseRows.hasNext(BaseRows.java:133)
org.apache.cassandra.db.rows.UnfilteredRowIterators.digest(UnfilteredRowIterators.java:178)
org.apache.cassandra.repair.Validator.rowHash(Validator.java:221)
org.apache.cassandra.repair.Validator.add(Validator.java:160)
org.apache.cassandra.db.compaction.CompactionManager.doValidationCompaction(CompactionManager.java:1364)
org.apache.cassandra.db.compaction.CompactionManager.access$700(CompactionManager.java:85)
org.apache.cassandra.db.compaction.CompactionManager$13.call(CompactionManager.java:933)
java.util.concurrent.FutureTask.run(FutureTask.java:266)
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
java.util.concurrent.FutureTask.run(FutureTask.java:266)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79)
org.apache.cassandra.concurrent.NamedThreadFactory$$Lambda$5/1371495133.run(Unknown Source)
java.lang.Thread.run(Thread.java:745)
{noformat}




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