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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-8233) NPE in CapacityScheduler#tryCommit when handling allocate/reserve proposal whose allocatedOrReservedContainer is null
Date Mon, 05 Nov 2018 06:14:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-8233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674709#comment-16674709
] 

Hadoop QA commented on YARN-8233:
---------------------------------

| (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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m  0s{color}
| {color:green} The patch appears to include 1 new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 20m 31s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 44s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 40s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 46s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 13m 30s{color}
| {color:green} branch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 23s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 34s{color} |
{color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 56s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 55s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 55s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 44s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 52s{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} 14m 40s{color}
| {color:green} patch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 28s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 27s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}104m 39s{color} | {color:red}
hadoop-yarn-server-resourcemanager in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 26s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}163m 20s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8f97d6f |
| JIRA Issue | YARN-8233 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12946853/YARN-8233.003.patch
|
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit
 shadedclient  findbugs  checkstyle  |
| uname | Linux d71d91c6d4e6 3.13.0-153-generic #203-Ubuntu SMP Thu Jun 14 08:52:28 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 4e3df75 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC1 |
| unit | https://builds.apache.org/job/PreCommit-YARN-Build/22413/artifact/out/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/22413/testReport/ |
| Max. process+thread count | 949 (vs. ulimit of 10000) |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/22413/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> NPE in CapacityScheduler#tryCommit when handling allocate/reserve proposal whose allocatedOrReservedContainer
is null
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-8233
>                 URL: https://issues.apache.org/jira/browse/YARN-8233
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 3.2.0
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Critical
>         Attachments: YARN-8233.001.patch, YARN-8233.002.patch, YARN-8233.003.patch
>
>
> Recently we saw a NPE problem in CapacityScheduler#tryCommit when try to find the attemptId
by calling {{c.getAllocatedOrReservedContainer().get...}} from an allocate/reserve proposal.
But got null allocatedOrReservedContainer and thrown NPE.
> Reference code:
> {code:java}
>     // find the application to accept and apply the ResourceCommitRequest
>     if (request.anythingAllocatedOrReserved()) {
>       ContainerAllocationProposal<FiCaSchedulerApp, FiCaSchedulerNode> c =
>           request.getFirstAllocatedOrReservedContainer();
>       attemptId =
>           c.getAllocatedOrReservedContainer().getSchedulerApplicationAttempt()
>               .getApplicationAttemptId();   //NPE happens here
>     } else { ...
> {code}
> The proposal was constructed in {{CapacityScheduler#createResourceCommitRequest}} and
allocatedOrReservedContainer is possibly null in async-scheduling process when node was lost
or application was finished (details in {{CapacityScheduler#getSchedulerContainer}}).
> Reference code:
> {code:java}
>       // Allocated something
>       List<AssignmentInformation.AssignmentDetails> allocations =
>           csAssignment.getAssignmentInformation().getAllocationDetails();
>       if (!allocations.isEmpty()) {
>         RMContainer rmContainer = allocations.get(0).rmContainer;
>         allocated = new ContainerAllocationProposal<>(
>             getSchedulerContainer(rmContainer, true),   //possibly null
>             getSchedulerContainersToRelease(csAssignment),
>             getSchedulerContainer(csAssignment.getFulfilledReservedContainer(),
>                 false), csAssignment.getType(),
>             csAssignment.getRequestLocalityType(),
>             csAssignment.getSchedulingMode() != null ?
>                 csAssignment.getSchedulingMode() :
>                 SchedulingMode.RESPECT_PARTITION_EXCLUSIVITY,
>             csAssignment.getResource());
>       }
> {code}
> I think we should add null check for allocateOrReserveContainer before create allocate/reserve
proposals. Besides the allocation process has increase unconfirmed resource of app when creating
an allocate assignment, so if this check is null, we should decrease the unconfirmed resource
of live app.



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