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From "Zachary Girouard (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13213) compactionstats not available, node eventually OOMs due to pending mutations
Date Sat, 11 Feb 2017 22:59:41 GMT
Zachary Girouard created CASSANDRA-13213:
--------------------------------------------

             Summary: compactionstats not available, node eventually OOMs due to pending mutations
                 Key: CASSANDRA-13213
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13213
             Project: Cassandra
          Issue Type: Bug
          Components: Compaction, Local Write-Read Paths
            Reporter: Zachary Girouard


I'm seeing semi-frequent instances of nodetool compactionstats hanging forever. While this
is occurring none of the compaction metrics are available via jmx/jconsole.

Sometimes the node will eventually recover, but I'm seeing a pattern where a node will exhibit
this behavior, and then eventually pending mutations start piling up and the node dies due
to OOM. Sometimes pending gossip operations starting piling up too, but I think this is due
to the impending OOM causing everything to bog down.

As an experiment I turned auto compaction off on all the nodes and I haven't seen this issue
occur since I did that. Additionally, I'm running relocatesstables on some nodes with unthrottled
compaction and so far none of them have had any issues handling it.

I managed to get some stack traces from a dying node:

All MutationStage threads look similar to this:
{noformat}
Name: MutationStage-10                                                          
State: WAITING
Total blocked: 9  Total waited: 1,959,850

Stack trace: 
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(Unknown Source)
org.apache.cassandra.utils.concurrent.WaitQueue$AbstractSignal.awaitUninterruptibly(WaitQueue.java:279)
org.apache.cassandra.utils.memory.MemtableAllocator$SubAllocator.allocate(MemtableAllocator.java:162)
org.apache.cassandra.utils.memory.SlabAllocator.allocate(SlabAllocator.java:89)
org.apache.cassandra.utils.memory.ContextAllocator.allocate(ContextAllocator.java:57)
org.apache.cassandra.utils.memory.ContextAllocator.clone(ContextAllocator.java:47)
org.apache.cassandra.db.rows.BufferCell.copy(BufferCell.java:122)
org.apache.cassandra.utils.memory.AbstractAllocator$CloningBTreeRowBuilder.addCell(AbstractAllocator.java:72)
org.apache.cassandra.db.rows.Rows.copy(Rows.java:51)
org.apache.cassandra.db.partitions.AtomicBTreePartition$RowUpdater.apply(AtomicBTreePartition.java:332)
org.apache.cassandra.db.partitions.AtomicBTreePartition$RowUpdater.apply(AtomicBTreePartition.java:295)
org.apache.cassandra.utils.btree.NodeBuilder.addNewKey(NodeBuilder.java:323)
org.apache.cassandra.utils.btree.NodeBuilder.update(NodeBuilder.java:184)
org.apache.cassandra.utils.btree.TreeBuilder.update(TreeBuilder.java:95)
org.apache.cassandra.utils.btree.BTree.update(BTree.java:182)
org.apache.cassandra.db.partitions.AtomicBTreePartition.addAllWithSizeDelta(AtomicBTreePartition.java:156)
org.apache.cassandra.db.Memtable.put(Memtable.java:284)org.apache.cassandra.db.ColumnFamilyStore.apply(ColumnFamilyStore.java:1316)
org.apache.cassandra.db.Keyspace.applyInternal(Keyspace.java:618)
org.apache.cassandra.db.Keyspace.applyFuture(Keyspace.java:425)
org.apache.cassandra.db.Mutation.applyFuture(Mutation.java:222)
org.apache.cassandra.db.MutationVerbHandler.doVerb(MutationVerbHandler.java:68)
org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:66)
java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162)
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$LocalSessionFutureTask.run(AbstractLocalAwareExecutorService.java:134)
org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:109)
java.lang.Thread.run(Unknown Source)
{noformat}

The Compaction threads
{noformat}
Name: CompactionExecutor:4
State: RUNNABLE
Total blocked: 32,781,277  Total waited: 549

Stack trace: 
org.apache.cassandra.io.sstable.format.SSTableReader.getTotalBytes(SSTableReader.java:661)
org.apache.cassandra.db.compaction.LeveledManifest.getCandidatesFor(LeveledManifest.java:669)
org.apache.cassandra.db.compaction.LeveledManifest.getCompactionCandidates(LeveledManifest.java:385)
   - locked org.apache.cassandra.db.compaction.LeveledManifest@55c79600
   org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:119)
   org.apache.cassandra.db.compaction.CompactionStrategyManager.getNextBackgroundTask(CompactionStrategyManager.java:119)
   org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:261)
   java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   java.util.concurrent.FutureTask.run(Unknown Source)
   java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   java.util.concurrent.FutureTask.run(Unknown Source)
   java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
   java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79)
   org.apache.cassandra.concurrent.NamedThreadFactory$$Lambda$4/45023307.run(Unknown Source)
   java.lang.Thread.run(Unknown Source)
{noformat}

{noformat}
   Name: CompactionExecutor:1
   State: BLOCKED on org.apache.cassandra.db.compaction.LeveledManifest@55c79600 owned by:
CompactionExecutor:2
   Total blocked: 116,196,349  Total waited: 4,771

   Stack trace: 
   org.apache.cassandra.db.compaction.LeveledManifest.getCompactionCandidates(LeveledManifest.java:310)
   org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:119)
   org.apache.cassandra.db.compaction.CompactionStrategyManager.getNextBackgroundTask(CompactionStrategyManager.java:119)
   org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:261)
   java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   java.util.concurrent.FutureTask.run(Unknown Source)
   java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   java.util.concurrent.FutureTask.run(Unknown Source)
   java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
   java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79)
   org.apache.cassandra.concurrent.NamedThreadFactory$$Lambda$4/45023307.run(Unknown Source)
   java.lang.Thread.run(Unknown Source)
{noformat}

{noformat}
   Name: CompactionExecutor:2
   State: BLOCKED on org.apache.cassandra.db.compaction.LeveledManifest@55c79600 owned by:
CompactionExecutor:1
   Total blocked: 26,542,909  Total waited: 4,373

   Stack trace: 
   org.apache.cassandra.db.compaction.LeveledManifest.getCompactionCandidates(LeveledManifest.java:310)
   org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:119)
   org.apache.cassandra.db.compaction.CompactionStrategyManager.getNextBackgroundTask(CompactionStrategyManager.java:119)
   org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:261)
   java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   java.util.concurrent.FutureTask.run(Unknown Source)
   java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   java.util.concurrent.FutureTask.run(Unknown Source)
   java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
   java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79)
   org.apache.cassandra.concurrent.NamedThreadFactory$$Lambda$4/45023307.run(Unknown Source)
   java.lang.Thread.run(Unknown Source)
{noformat}

Tp stats from the node
{noformat}
  Pool Name                    Active   Pending      Completed   Blocked  All time blocked
  MutationStage                    32    762545       53122841         0                 0
  ViewMutationStage                 0         0              0         0                 0
  ReadStage                         0         0         247792         0                 0
  RequestResponseStage              0         0         200621         0                 0
  ReadRepairStage                   0         0           2489         0                 0
  CounterMutationStage              0         0              0         0                 0
  MiscStage                         0         0              0         0                 0
  CompactionExecutor                3        58          26816         0                 0
  MemtableReclaimMemory             0         0            176         0                 0
  PendingRangeCalculator            0         0             84         0                 0
  GossipStage                       0         0         235500         0                 0
  SecondaryIndexManagement          0         0              0         0                 0
  HintsDispatcher                   0         0            749         0                 0
  PerDiskMemtableFlushWriter_1         0         0            156         0              
  0
  PerDiskMemtableFlushWriter_2         0         0            156         0              
  0
  MigrationStage                    1        25             73         0                 0
  MemtablePostFlush                 1        25           1953         0                 0
  PerDiskMemtableFlushWriter_0         0         0            176         0              
  0
  ValidationExecutor                0         0           1320         0                 0
  Sampler                           0         0              0         0                 0
  MemtableFlushWriter               1        18            176         0                 0
  InternalResponseStage             0         0           3030         0                 0
  AntiEntropyStage                  0         0           4087         0                 0
  CacheCleanupExecutor              0         0              0         0                 0
  Native-Transport-Requests         0         0         670925         0                 0


{noformat}




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