[jira] [Closed] (FLINK-6278) After "FATAL" message in logs taskmanager still working

["Till Rohrmann (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann closed FLINK-6278.
--------------------------------
    Resolution: Not A Problem

Not a problem in current Flink versions.

> After "FATAL" message in logs taskmanager still working
> -------------------------------------------------------
>
>                 Key: FLINK-6278
>                 URL: https://issues.apache.org/jira/browse/FLINK-6278
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Coordination
>    Affects Versions: 1.2.0
>            Reporter: Andrey
>            Priority: Major
>         Attachments: threaddump.txt
>
>
> Steps to reproduce:
> * create job which cause OOM. For example for each incoming message create byte array and store in memory:
> {code}
>         }).flatMap(new RichFlatMapFunction<String, AggregatedHash>() {
>             private List<byte[]> oomList = new ArrayList<>();
>             @Override
>             public void flatMap(String value, Collector<AggregatedHash> out) throws Exception {
>                 if (oomHost != null && oomHost.equals(host)) {
>                     //multiply speed towards oom
>                     oomList.add(new byte[100 * 1024]);
>                 }
>            }
>      }
> {code}
> * after some time task manager hangs
> * according to logs task manager will be disconnected from zookeeper (ha mode was configured) and job manager
> * then big log entry:
> {code}
> 2017-04-07 09:13:32,893 ERROR org.apache.flink.runtime.taskmanager.TaskManager              - 
> ==============================================================
> ======================      FATAL      =======================
> ==============================================================
> A fatal error occurred, forcing the TaskManager to shut down: Task 'Flat Map -> Sink: Unnamed (2/2)' did not react to cancelling signal in the last 30 seconds, but is stuck in method:
>  org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:182)
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:63)
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:272)
> org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
> java.lang.Thread.run(Thread.java:745)
> {code}
> * TM still running.
> Thread dump attached.
> Expected:
> * shutdown task manager



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