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https://issues.apache.org/jira/browse/MAPREDUCE-7156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16670421#comment-16670421
]
Hadoop QA commented on MAPREDUCE-7156:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
20s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m
0s{color} | {color:red} The patch doesn't appear to include any new or modified
tests. Please justify why no new tests are needed for this patch. Also please
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 26m
45s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
24s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
18s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
26s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
12m 39s{color} | {color:green} branch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m
38s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
23s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
28s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
24s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m
24s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
13m 19s{color} | {color:green} patch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m
42s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
17s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m
29s{color} | {color:green} hadoop-mapreduce-client-shuffle in the patch passed.
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
25s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 58m 56s{color} |
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8f97d6f |
| JIRA Issue | MAPREDUCE-7156 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12946365/MAPREDUCE-7156-001.patch
|
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient findbugs checkstyle |
| uname | Linux fc0b8da92f8b 3.13.0-144-generic #193-Ubuntu SMP Thu Mar 15
17:03:53 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 478b2cb |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC1 |
| Test Results |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7521/testReport/ |
| Max. process+thread count | 339 (vs. ulimit of 10000) |
| modules | C:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle
U:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle
|
| Console output |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7521/console |
| Powered by | Apache Yetus 0.8.0 http://yetus.apache.org |
This message was automatically generated.
> NullPointerException when reaching max shuffle connections
> ----------------------------------------------------------
>
> Key: MAPREDUCE-7156
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7156
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.9.1, 3.1.1
> Reporter: Peter Bacsko
> Assignee: Peter Bacsko
> Priority: Major
> Attachments: MAPREDUCE-7156-001.patch
>
>
> When you hit the max number of shuffle connections, you can get a lot of
> NullPointerExceptions from Netty:
> {noformat}
> 2018-07-17 10:47:36,311 INFO org.apache.hadoop.mapred.ShuffleHandler: Current
> number of shuffle connections (360) is greater than or equal to the max
> allowed shuffle connections (360)
> 2018-07-17 10:47:36,311 INFO org.apache.hadoop.mapred.ShuffleHandler: Current
> number of shuffle connections (360) is greater than or equal to the max
> allowed shuffle connections (360)
> 2018-07-17 10:47:36,312 INFO org.apache.hadoop.mapred.ShuffleHandler: Current
> number of shuffle connections (360) is greater than or equal to the max
> allowed shuffle connections (360)
> 2018-07-17 10:47:36,316 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> 2018-07-17 10:47:36,317 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error [id: 0x71187405, /10.17.226.11:44330 => /10.17.202.21:13562]
> EXCEPTION: java.lang.NullPointerException
> 2018-07-17 10:47:36,317 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> 2018-07-17 10:47:36,317 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error [id: 0x71187405, /10.17.226.11:44330 => /10.17.202.21:13562]
> EXCEPTION: java.lang.NullPointerException
> 2018-07-17 10:47:36,317 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> 2018-07-17 10:47:36,317 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error [id: 0x71187405, /10.17.226.11:44330 => /10.17.202.21:13562]
> EXCEPTION: java.lang.NullPointerException
> 2018-07-17 10:47:36,329 INFO
> org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl:
> Skipping monitoring container container_e22_1531424278071_55040_01_002295
> since CPU usage is not yet available.
> 2018-07-17 10:47:36,340 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> 2018-07-17 10:47:36,340 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error [id: 0xea8afd26, /10.17.202.18:43810 => /10.17.202.21:13562]
> EXCEPTION: java.lang.NullPointerException
> 2018-07-17 10:47:36,349 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> 2018-07-17 10:47:36,349 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error [id: 0xea8afd26, /10.17.202.18:43810 => /10.17.202.21:13562]
> EXCEPTION: java.lang.NullPointerException
> 2018-07-17 10:47:36,349 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> 2018-07-17 10:47:36,349 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error [id: 0xea8afd26, /10.17.202.18:43810 => /10.17.202.21:13562]
> EXCEPTION: java.lang.NullPointerException
> 2018-07-17 10:47:36,361 INFO org.apache.hadoop.mapred.ShuffleHandler: Current
> number of shuffle connections (360) is greater than or equal to the max
> allowed shuffle connections (360)
> 2018-07-17 10:47:36,390 INFO org.apache.hadoop.mapred.ShuffleHandler: Current
> number of shuffle connections (360) is greater than or equal to the max
> allowed shuffle connections (360)
> 2018-07-17 10:47:36,395 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> {noformat}
> {noformat}
> 2018-07-17 13:58:28,263 INFO org.apache.hadoop.mapred.ShuffleHandler: Current
> number of shuffle connections (360) is greater than or equal to the max
> allowed shuffle connections (360)
> 2018-07-17 13:58:28,264 ERROR org.apache.hadoop.mapred.ShuffleHandler:
> Shuffle error:
> java.lang.NullPointerException
> at
> org.jboss.netty.handler.timeout.IdleStateHandler.writeComplete(IdleStateHandler.java:302)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:73)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.writeComplete(SimpleChannelUpstreamHandler.java:233)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:73)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
> at
> org.jboss.netty.handler.stream.ChunkedWriteHandler.handleUpstream(ChunkedWriteHandler.java:142)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.writeComplete(SimpleChannelUpstreamHandler.java:233)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:73)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.writeComplete(SimpleChannelUpstreamHandler.java:233)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:73)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.writeComplete(SimpleChannelUpstreamHandler.java:233)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:73)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
> at
> org.jboss.netty.channel.Channels.fireWriteComplete(Channels.java:324)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioWorker.write0(AbstractNioWorker.java:299)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioWorker.writeFromUserCode(AbstractNioWorker.java:146)
> at
> org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.handleAcceptedSocket(NioServerSocketPipelineSink.java:99)
> at
> org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.eventSunk(NioServerSocketPipelineSink.java:36)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:779)
> at org.jboss.netty.channel.Channels.write(Channels.java:725)
> at org.jboss.netty.channel.Channels.write(Channels.java:686)
> at
> org.jboss.netty.handler.ssl.SslHandler.wrapNonAppData(SslHandler.java:1110)
> at org.jboss.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1252)
> at org.jboss.netty.handler.ssl.SslHandler.decode(SslHandler.java:852)
> at
> org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:425)
> at
> org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
> at
> org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
> at
> org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
> at
> org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
> at
> org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
> at
> org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
> at
> org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
> Solutions seems to be an one-liner: you have to call {{super.channelOpen(ctx,
> evt);}} in {{Shuffle.channelOpen()}} in both cases. If we don't do this, then
> {{IdleStateHandler}} will not be initialized properly and will get a null
> attachment object when executing {{writeComplete()}}.
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