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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-2076) Bug in re-openable hash join
Date Thu, 21 May 2015 19:14:17 GMT
Stephan Ewen created FLINK-2076:
-----------------------------------

             Summary: Bug in re-openable hash join
                 Key: FLINK-2076
                 URL: https://issues.apache.org/jira/browse/FLINK-2076
             Project: Flink
          Issue Type: Bug
          Components: Local Runtime
    Affects Versions: 0.9
            Reporter: Stephan Ewen


It happens deterministically in my machine with the following setup:

TaskManager:
  - heap size: 512m
  - network buffers: 4096
  - slots: 32

Job:
  - ConnectedComponents
  - 100k vertices
  - 1.2m edges

--> this gives around 260 m Flink managed memory, across 32 slots is 8MB per slot, with
several mem consumers in the job, makes the iterative hash join out-of-core

{code}
java.lang.RuntimeException: Hash Join bug in memory management: 
Memory buffers leaked.
	at org.apache.flink.runtime.operators.hash.MutableHashTable.buildTableFromSpilledPartition(MutableHashTable.java:733)
	at org.apache.flink.runtime.operators.hash.MutableHashTable.prepareNextPartition(MutableHashTable.java:508)
	at org.apache.flink.runtime.operators.hash.ReOpenableMutableHashTable.prepareNextPartition(ReOpenableMutableHashTable.java:167)
	at org.apache.flink.runtime.operators.hash.MutableHashTable.nextRecord(MutableHashTable.java:541)
	at org.apache.flink.runtime.operators.hash.NonReusingBuildSecondHashMatchIterator.callWithNextKey(NonReusingBuildSecondHashMatchIterator.java:102)
	at org.apache.flink.runtime.operators.AbstractCachedBuildSideMatchDriver.run(AbstractCachedBuildSideMatchDriver.java:155)
	at org.apache.flink.runtime.operators.RegularPactTask.run(RegularPactTask.java:496)
	at org.apache.flink.runtime.iterative.task.AbstractIterativePactTask.run(AbstractIterativePactTask.java:139)
	at org.apache.flink.runtime.iterative.task.IterationIntermediatePactTask.run(IterationIntermediatePactTask.java:92)
	at org.apache.flink.runtime.operators.RegularPactTask.invoke(RegularPactTask.java:362)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:560)
	at java.lang.Thread.run(Thread.java:745)
{code}



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