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https://issues.apache.org/jira/browse/APEXCORE-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15859652#comment-15859652
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Vlad Rozov commented on APEXCORE-640:
-------------------------------------
The code in the BufferServer that handles the case when all data published so
far is purged needs to be re-written. The purpose of SerializedData object is
not clear. The exception thrown by the Slice initialization is on purpose, as
SerialziedData object is invalid.
> BufferServer - purge crashes when the window purged is the last available
> -------------------------------------------------------------------------
>
> Key: APEXCORE-640
> URL: https://issues.apache.org/jira/browse/APEXCORE-640
> Project: Apache Apex Core
> Issue Type: Bug
> Reporter: Sandesh
> Assignee: Sandesh
> Priority: Minor
>
> While working on the unit test of BufferServer saw this behavior,
> purge on the last window in the buffer server crashes it.
> {noformat}
> java.lang.IllegalArgumentException: Invalid slice: offset=2118, length=0
> array.length=4096
> at com.datatorrent.netlet.util.Slice.<init>(Slice.java:43)
> at
> com.datatorrent.bufferserver.util.SerializedData.<init>(SerializedData.java:40)
> at
> com.datatorrent.bufferserver.internal.DataList$Block.purge(DataList.java:712)
> at
> com.datatorrent.bufferserver.internal.DataList.purge(DataList.java:192)
> at
> com.datatorrent.bufferserver.server.Server.handlePurgeRequest(Server.java:199)
> at
> com.datatorrent.bufferserver.server.Server.access$1100(Server.java:65)
> at
> com.datatorrent.bufferserver.server.Server$UnidentifiedClient.onMessage(Server.java:526)
> at
> com.datatorrent.netlet.AbstractLengthPrependerClient.read(AbstractLengthPrependerClient.java:149)
> at com.datatorrent.netlet.AbstractClient.read(AbstractClient.java:104)
> at
> com.datatorrent.netlet.DefaultEventLoop.handleSelectedKey(DefaultEventLoop.java:364)
> at
> com.datatorrent.netlet.OptimizedEventLoop$SelectedSelectionKeySet.forEach(OptimizedEventLoop.java:59)
> at
> com.datatorrent.netlet.OptimizedEventLoop.runEventLoop(OptimizedEventLoop.java:192)
> at
> com.datatorrent.netlet.OptimizedEventLoop.runEventLoop(OptimizedEventLoop.java:157)
> at
> com.datatorrent.netlet.DefaultEventLoop.run(DefaultEventLoop.java:156)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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