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From "Vlad Rozov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (APEXCORE-374) Block with positive reference count is found during buffer server purge
Date Mon, 07 Mar 2016 15:41:40 GMT

     [ https://issues.apache.org/jira/browse/APEXCORE-374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vlad Rozov updated APEXCORE-374:
--------------------------------
    Summary: Block with positive reference count is found during buffer server purge  (was:
Container killed because of exception.)

> Block with positive reference count is found during buffer server purge
> -----------------------------------------------------------------------
>
>                 Key: APEXCORE-374
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-374
>             Project: Apache Apex Core
>          Issue Type: Bug
>    Affects Versions: 3.2.0
>            Reporter: Tushar Gosavi
>            Assignee: Vlad Rozov
>
> Saw this issue today with high load and MxN partitions on 3.2 branch.
> Exception in thread "ProcessWideEventLoop" java.lang.IllegalStateException: Discarded
block com.datatorrent.bufferserver.internal.DataList$Block@7d614fb5{identifier=2.data.2, data=67108864,
readingOffset=0, writingOffset=67108864, starting_window=56d95dfa00000a79, ending_window=56d95dfa00000a83,
refCount=1, uniqueIdentifier=0, next=2.data.2, future=java.util.concurrent.FutureTask@7fb83461}
has positive reference count!
>                 at com.datatorrent.bufferserver.internal.DataList.purge(DataList.java:196)
>                 at com.datatorrent.bufferserver.server.Server.handlePurgeRequest(Server.java:185)
>                 at com.datatorrent.bufferserver.server.Server.access$200(Server.java:66)
>                 at com.datatorrent.bufferserver.server.Server$UnidentifiedClient.onMessage(Server.java:478)
>                 at com.datatorrent.netlet.AbstractLengthPrependerClient.read(AbstractLengthPrependerClient.java:149)
>                 at com.datatorrent.bufferserver.server.Server$SeedDataClient.transferBuffer(Server.java:832)
>                 at com.datatorrent.bufferserver.server.Server$AuthClient.onMessage(Server.java:361)
>                 at com.datatorrent.netlet.AbstractLengthPrependerClient.read(AbstractLengthPrependerClient.java:149)
>                 at com.datatorrent.netlet.AbstractClient.read(AbstractClient.java:128)
>                 at com.datatorrent.netlet.DefaultEventLoop.handleSelectedKey(DefaultEventLoop.java:322)
>                 at com.datatorrent.netlet.OptimizedEventLoop$SelectedSelectionKeySet.forEach(OptimizedEventLoop.java:58)
>                 at com.datatorrent.netlet.OptimizedEventLoop.runEventLoop(OptimizedEventLoop.java:188)
>                 at com.datatorrent.netlet.OptimizedEventLoop.runEventLoop(OptimizedEventLoop.java:156)
>                 at com.datatorrent.netlet.DefaultEventLoop.run(DefaultEventLoop.java:119)
>                 at java.lang.Thread.run(Thread.java:745)



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