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https://issues.apache.org/jira/browse/YARN-10642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17342525#comment-17342525
]
Hadoop QA commented on YARN-10642:
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|| Vote || Subsystem || Runtime || Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 10m
1s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} || ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green} 0m
0s{color} | {color:green}{color} | {color:green} No case conflicting files
found. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green}{color} | {color:green} The patch does not contain any
@author tags. {color} |
| {color:green}+1{color} | {color:green} {color} | {color:green} 0m 0s{color}
| {color:green}test4tests{color} | {color:green} The patch appears to include 1
new or modified test files. {color} |
|| || || || {color:brown} branch-3.1 Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 26m
2s{color} | {color:green}{color} | {color:green} branch-3.1 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
41s{color} | {color:green}{color} | {color:green} branch-3.1 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
32s{color} | {color:green}{color} | {color:green} branch-3.1 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
46s{color} | {color:green}{color} | {color:green} branch-3.1 passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
13m 7s{color} | {color:green}{color} | {color:green} branch has no errors when
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
48s{color} | {color:green}{color} | {color:green} branch-3.1 passed {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 15m
39s{color} | {color:blue}{color} | {color:blue} Both FindBugs and SpotBugs are
enabled, using SpotBugs. {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green} 1m
44s{color} | {color:green}{color} | {color:green} branch-3.1 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
40s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
36s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m
36s{color} | {color:green}{color} | {color:green} the patch passed {color} |
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23s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
37s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green}{color} | {color:green} The patch has no whitespace
issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
12m 54s{color} | {color:green}{color} | {color:green} patch has no errors when
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
43s{color} | {color:green}{color} | {color:green} the patch passed {color} |
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52s{color} | {color:green}{color} | {color:green} the patch passed {color} |
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| {color:green}+1{color} | {color:green} unit {color} | {color:green} 3m
58s{color} | {color:green}{color} | {color:green} hadoop-yarn-common in the
patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
30s{color} | {color:green}{color} | {color:green} The patch does not generate
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| {color:black}{color} | {color:black} {color} | {color:black} 76m 15s{color} |
{color:black}{color} | {color:black}{color} |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/973/artifact/out/Dockerfile
|
| JIRA Issue | YARN-10642 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/13025310/YARN-10642-branch-3.1.001.patch
|
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite
unit shadedclient findbugs checkstyle spotbugs |
| uname | Linux 94469edd1854 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | branch-3.1 / 39bf9e270e3 |
| Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~18.04-b10 |
| Test Results |
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/973/testReport/ |
| Max. process+thread count | 410 (vs. ulimit of 5500) |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common U:
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common |
| Console output |
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/973/console |
| versions | git=2.17.1 maven=3.6.0 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |
This message was automatically generated.
> Race condition: AsyncDispatcher can get stuck by the changes introduced in
> YARN-8995
> ------------------------------------------------------------------------------------
>
> Key: YARN-10642
> URL: https://issues.apache.org/jira/browse/YARN-10642
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 3.2.1
> Reporter: zhengchenyu
> Assignee: zhengchenyu
> Priority: Critical
> Fix For: 3.4.0, 3.3.1, 3.2.3
>
> Attachments: MockForDeadLoop.java, YARN-10642-branch-3.1.001.patch,
> YARN-10642-branch-3.2.001.patch, YARN-10642-branch-3.2.002.patch,
> YARN-10642-branch-3.3.001.patch, YARN-10642.001.patch, YARN-10642.002.patch,
> YARN-10642.003.patch, YARN-10642.004.patch, YARN-10642.005.patch,
> deadloop.png, debugfornode.png, put.png, take.png
>
>
> In our cluster, ResouceManager stuck twice within twenty days. Yarn client
> can't submit application. I got jstack info at second time, then found the
> reason.
> I analyze all the jstack, I found many thread stuck because can't get
> LinkedBlockingQueue.putLock. (Note: Sorry for limited space , omit the
> analytical process)
> The reason is that one thread hold the putLock all the time,
> printEventQueueDetails will called forEachRemaining, then hold putLock and
> readLock. The AsyncDispatcher will stuck.
> {code}
> Thread 6526 (IPC Server handler 454 on default port 8030):
> State: RUNNABLE
> Blocked count: 29988
> Waited count: 2035029
> Stack:
>
> java.util.concurrent.LinkedBlockingQueue$LBQSpliterator.forEachRemaining(LinkedBlockingQueue.java:926)
> java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
>
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
> java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
> java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
> java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
>
> org.apache.hadoop.yarn.event.AsyncDispatcher$GenericEventHandler.printEventQueueDetails(AsyncDispatcher.java:270)
>
> org.apache.hadoop.yarn.event.AsyncDispatcher$GenericEventHandler.handle(AsyncDispatcher.java:295)
>
> org.apache.hadoop.yarn.server.resourcemanager.DefaultAMSProcessor.handleProgress(DefaultAMSProcessor.java:408)
>
> org.apache.hadoop.yarn.server.resourcemanager.DefaultAMSProcessor.allocate(DefaultAMSProcessor.java:215)
>
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.processor.DisabledPlacementProcessor.allocate(DisabledPlacementProcessor.java:75)
>
> org.apache.hadoop.yarn.server.resourcemanager.AMSProcessingChain.allocate(AMSProcessingChain.java:92)
>
> org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.allocate(ApplicationMasterService.java:432)
>
> org.apache.hadoop.yarn.api.impl.pb.service.ApplicationMasterProtocolPBServiceImpl.allocate(ApplicationMasterProtocolPBServiceImpl.java:60)
>
> org.apache.hadoop.yarn.proto.ApplicationMasterProtocol$ApplicationMasterProtocolService$2.callBlockingMethod(ApplicationMasterProtocol.java:99)
>
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:528)
> org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1070)
> org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1040)
> org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:958)
> java.security.AccessController.doPrivileged(Native Method)
> {code}
> I analyze LinkedBlockingQueue's source code. I found forEachRemaining in
> LinkedBlockingQueue.LBQSpliterator may stuck, when forEachRemaining and take
> are called in different thread.
> YARN-8995 introduce printEventQueueDetails method,
> "eventQueue.stream().collect" will called forEachRemaining method.
> Let's see why？ "put.png" shows that how to put("a"), "take.png" shows that
> how to take()。Specical Node: The removed Node will point itself for help gc!!!
> The key point code is in forEachRemaining, we see LBQSpliterator use
> forEachRemaining to visit all Node. But when got item value from Node, will
> release the lock. If at this time, take() will be called.
> The variable 'p' in forEachRemaining may point a Node which point itself,
> then forEachRemaining will be in dead loop. You can see it in "deadloop.png"
> Let's see a simple uni-test, Let's forEachRemaining called more slow than
> take, the problem will reproduction。uni-test is MockForDeadLoop.java.
> I debug MockForDeadLoop.java, and see a Node point itself. You can see pic
> "debugfornode.png"
> Environment:
> OS: CentOS Linux release 7.5.1804 (Core)
> JDK: jdk1.8.0_281
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