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https://issues.apache.org/jira/browse/FLINK-9190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16447281#comment-16447281
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ASF GitHub Bot commented on FLINK-9190:
---------------------------------------
Github user GJL commented on a diff in the pull request:
https://github.com/apache/flink/pull/5881#discussion_r183242992
--- Diff:
flink-yarn/src/main/java/org/apache/flink/yarn/YarnResourceManager.java ---
@@ -114,6 +118,9 @@
private final Map<ResourceProfile, Integer> resourcePriorities = new
HashMap<>();
+ /** The containers that we expected to register with ResourceManager. */
+ private final Map<ResourceID, Container>
pendingContainersExpectedToRegister = new ConcurrentHashMap<>();
--- End diff --
A concurrent map is not needed because state modifications are performed in
the main thread of the RPC framework.
It's enough to use a `HashMap`:
```
private final Map<ResourceID, Container>
pendingContainersExpectedToRegister = new HashMap<>();
```
> YarnResourceManager sometimes does not request new Containers
> -------------------------------------------------------------
>
> Key: FLINK-9190
> URL: https://issues.apache.org/jira/browse/FLINK-9190
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination, YARN
> Affects Versions: 1.5.0
> Environment: Hadoop 2.8.3
> ZooKeeper 3.4.5
> Flink 71c3cd2781d36e0a03d022a38cc4503d343f7ff8
> Reporter: Gary Yao
> Assignee: Sihua Zhou
> Priority: Blocker
> Labels: flip-6
> Fix For: 1.5.0
>
> Attachments: yarn-logs
>
>
> *Description*
> The {{YarnResourceManager}} does not request new containers if
> {{TaskManagers}} are killed rapidly in succession. After 5 minutes the job is
> restarted due to {{NoResourceAvailableException}}, and the job runs normally
> afterwards. I suspect that {{TaskManager}} failures are not registered if the
> failure occurs before the {{TaskManager}} registers with the master. Logs are
> attached; I added additional log statements to
> {{YarnResourceManager.onContainersCompleted}} and
> {{YarnResourceManager.onContainersAllocated}}.
> *Expected Behavior*
> The {{YarnResourceManager}} should recognize that the container is completed
> and keep requesting new containers. The job should run as soon as resources
> are available.
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