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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2022/02/04 00:13:00 UTC
[jira] [Work logged] (HIVE-25706) ShuffleHandler: Make sure of properly releasing netty reference counted objects
[ https://issues.apache.org/jira/browse/HIVE-25706?focusedWorklogId=720538&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-720538 ]
ASF GitHub Bot logged work on HIVE-25706:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Feb/22 00:12
Start Date: 04/Feb/22 00:12
Worklog Time Spent: 10m
Work Description: github-actions[bot] closed pull request #2794:
URL: https://github.com/apache/hive/pull/2794
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Issue Time Tracking
-------------------
Worklog Id: (was: 720538)
Time Spent: 1h 10m (was: 1h)
> ShuffleHandler: Make sure of properly releasing netty reference counted objects
> -------------------------------------------------------------------------------
>
> Key: HIVE-25706
> URL: https://issues.apache.org/jira/browse/HIVE-25706
> Project: Hive
> Issue Type: Bug
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> https://netty.io/wiki/reference-counted-objects.html
> ShuffleHandler log contains issues below when we're on unhappy codepath (sendError). Very easily reproducible e.g. with calling ShuffleHandler's http port without any parameters. Doesn't cause a user-facing issue, because at this point ShuffleHandler already responded to the client, but the exception is annoying and implies invalid .release() calls in netty4.
> {code}
> io.netty.util.IllegalReferenceCountException: refCnt: 0, decrement: 1
> at io.netty.util.internal.ReferenceCountUpdater.toLiveRealRefCnt(ReferenceCountUpdater.java:74) ~[netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.util.internal.ReferenceCountUpdater.release(ReferenceCountUpdater.java:138) ~[netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.buffer.AbstractReferenceCountedByteBuf.release(AbstractReferenceCountedByteBuf.java:100) ~[netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.handler.codec.http.DefaultFullHttpResponse.release(DefaultFullHttpResponse.java:116) ~[netty-all-4.1.65.Final.jar:4.1.65.Final]
> at org.apache.hadoop.hive.llap.shufflehandler.ShuffleHandler$Shuffle.sendError(ShuffleHandler.java:1056) ~[classes/:?]
> at org.apache.hadoop.hive.llap.shufflehandler.ShuffleHandler$Shuffle.handleRequest(ShuffleHandler.java:827) ~[classes/:?]
> at org.apache.hadoop.hive.llap.shufflehandler.ShuffleHandler$Shuffle.channelRead(ShuffleHandler.java:728) ~[classes/:?]
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [netty-all-4.1.65.Final.jar:4.1.65.Final]
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-all-4.1.65.Final.jar:4.1.65.Final]
> {code}
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