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From "Ganelin, Ilya" <Ilya.Gane...@capitalone.com>
Subject Obscure buffer server error
Date Thu, 17 Mar 2016 20:00:45 GMT
Hello all – could use some help understanding the error below:

This shows up when I run the Apex program in local mode. Things run fine for a short time,
then I get a pause in my output and see these messages ultimately terminating in an exception:

2016-03-17 12:54:14,458 [ProcessWideEventLoop] DEBUG internal.DataList release - Holding com.datatorrent.bufferserver.internal.DataList$Block@18b788b4{identifier=11.latenciesOut.2,
data=1048576, readingOffset=0, writingOffset=1048576, starting_window=56eb0b5e00000001, ending_window=56eb0b5e00000012,
refCount=3, uniqueIdentifier=0, next=11.latenciesOut.2, future=null} in memory due to 3 references.
2016-03-17 12:54:14,459 [ServerHelper-1-1] DEBUG internal.DataList release - Holding com.datatorrent.bufferserver.internal.DataList$Block@18b788b4{identifier=11.latenciesOut.2,
data=1048576, readingOffset=0, writingOffset=1048576, starting_window=56eb0b5e00000001, ending_window=56eb0b5e00000012,
refCount=2, uniqueIdentifier=0, next=11.latenciesOut.2, future=null} in memory due to 2 references.
2016-03-17 12:54:14,459 [ServerHelper-1-1] DEBUG internal.DataList release - Holding com.datatorrent.bufferserver.internal.DataList$Block@18b788b4{identifier=11.latenciesOut.2,
data=1048576, readingOffset=0, writingOffset=1048576, starting_window=56eb0b5e00000001, ending_window=56eb0b5e00000012,
refCount=1, uniqueIdentifier=0, next=11.latenciesOut.2, future=null} in memory due to 1 references.
2016-03-17 12:54:14,486 [ProcessWideEventLoop] DEBUG internal.DataList release - Holding com.datatorrent.bufferserver.internal.DataList$Block@7abb74fb{identifier=1.output.1,
data=1048576, readingOffset=0, writingOffset=1048576, starting_window=56eb0b5e00000011, ending_window=56eb0b5e00000012,
refCount=3, uniqueIdentifier=0, next=1.output.1, future=null} in memory due to 3 references.
2016-03-17 12:54:14,486 [ServerHelper-1-1] DEBUG internal.DataList release - Holding com.datatorrent.bufferserver.internal.DataList$Block@7abb74fb{identifier=1.output.1,
data=1048576, readingOffset=0, writingOffset=1048576, starting_window=56eb0b5e00000011, ending_window=56eb0b5e00000012,
refCount=2, uniqueIdentifier=0, next=1.output.1, future=null} in memory due to 2 references.
2016-03-17 12:54:14,487 [ServerHelper-1-1] DEBUG internal.DataList release - Holding com.datatorrent.bufferserver.internal.DataList$Block@7abb74fb{identifier=1.output.1,
data=1048576, readingOffset=0, writingOffset=1048576, starting_window=56eb0b5e00000011, ending_window=56eb0b5e00000012,
refCount=1, uniqueIdentifier=0, next=1.output.1, future=null} in memory due to 1 references.


2016-03-17 12:55:18,708 [ProcessWideEventLoop] WARN  netlet.DefaultEventLoop run -
Unexpected termination of {id=ProcessWideEventLoop, head=66, tail=66, capacity=1024}

Exception in thread "ProcessWideEventLoop" java.lang.IllegalStateException: Discarded block
com.datatorrent.bufferserver.internal.DataList$Block@20436d87{identifier=11.latenciesOut.2,
data=1048576, readingOffset=0, writingOffset=386752, starting_window=56eb0b5e00000012, ending_window=56eb0b5e00000014,
refCount=5, uniqueIdentifier=0, next=null, future=Done} has positive reference count!
at com.datatorrent.bufferserver.internal.DataList.rewind(DataList.java:122)
at com.datatorrent.bufferserver.server.Server.handlePublisherRequest(Server.java:321)
at com.datatorrent.bufferserver.server.Server$UnidentifiedClient.onMessage(Server.java:408)
at com.datatorrent.netlet.AbstractLengthPrependerClient.read(AbstractLengthPrependerClient.java:149)
at com.datatorrent.netlet.AbstractClient.read(AbstractClient.java:117)
at com.datatorrent.netlet.DefaultEventLoop.handleSelectedKey(DefaultEventLoop.java:314)
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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