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Posted to dev@storm.apache.org by "Abhishek Agarwal (JIRA)" <ji...@apache.org> on 2015/09/08 09:53:45 UTC
[jira] [Assigned] (STORM-292) emit blocks the publishing bolt if
disrupter queue is full
[ https://issues.apache.org/jira/browse/STORM-292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Abhishek Agarwal reassigned STORM-292:
--------------------------------------
Assignee: Abhishek Agarwal
> emit blocks the publishing bolt if disrupter queue is full
> -------------------------------------------------------------
>
> Key: STORM-292
> URL: https://issues.apache.org/jira/browse/STORM-292
> Project: Apache Storm
> Issue Type: Bug
> Affects Versions: 0.9.2-incubating
> Reporter: Kishor Patil
> Assignee: Abhishek Agarwal
>
> During testing, i notice once the disruptor queue is full, it blocks (timed_wait ) the publishing bolt essentially creating slowdown live-lock. Should the outputCollector.emit be a non-blocking call?
> Also, configs for better control on the disruptor queue/buffer size seem to not have any impact.
>
> "topology.executor.receive.buffer.size"
> "topology.receiver.buffer.size"
> "topology.executor.send.buffer.size"
> "topology.transfer.buffer.size"
> Below is example of topology that re-creates live lock scenario with disruptor queue.
> https://github.com/kishorvpatil/incubator-storm/blob/dqueue-full/examples/storm-starter/src/jvm/storm/starter/SplitJoinTopology.java
> "Thread-9-splitjoinbolt" prio=10 tid=0x00007fe518a9f000 nid=0x64b5 waiting on condition [0x00007fe5144f2000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:349)
> at com.lmax.disruptor.SingleThreadedClaimStrategy.waitForFreeSlotAt(SingleThreadedClaimStrategy.java:129)
> at com.lmax.disruptor.SingleThreadedClaimStrategy.incrementAndGet(SingleThreadedClaimStrategy.java:81)
> at com.lmax.disruptor.Sequencer.next(Sequencer.java:127)
> at backtype.storm.utils.DisruptorQueue.publish(DisruptorQueue.java:113)
> at backtype.storm.disruptor$publish.invoke(disruptor.clj:51)
> at backtype.storm.daemon.executor$mk_executor_transfer_fn$this__4913.invoke(executor.clj:176)
> at backtype.storm.daemon.executor$mk_executor_transfer_fn$this__4913.invoke(executor.clj:183)
> at backtype.storm.daemon.executor$mk_executor_transfer_fn$this__4913.invoke(executor.clj:185)
> at backtype.storm.daemon.executor$fn__5141$fn__5155$bolt_emit__5184.invoke(executor.clj:683)
> at backtype.storm.daemon.executor$fn__5141$fn$reify__5190.emit(executor.clj:693)
> at backtype.storm.task.OutputCollector.emit(OutputCollector.java:186)
> at backtype.storm.task.OutputCollector.emit(OutputCollector.java:32)
> at backtype.storm.topology.BasicOutputCollector.emit(BasicOutputCollector.java:19)
> at storm.starter.bolt.SplitAndCountBolt.execute(SplitAndCountBolt.java:24)
> at backtype.storm.topology.BasicBoltExecutor.execute(BasicBoltExecutor.java:33)
> at backtype.storm.daemon.executor$fn__5141$tuple_action_fn__5143.invoke(executor.clj:634)
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