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Posted to dev@giraph.apache.org by "Dionysios Logothetis (Jira)" <ji...@apache.org> on 2020/08/14 16:16:00 UTC

[jira] [Reopened] (GIRAPH-1187) NPE in worker GC listener

     [ https://issues.apache.org/jira/browse/GIRAPH-1187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dionysios Logothetis reopened GIRAPH-1187:
------------------------------------------

> NPE in worker GC listener 
> --------------------------
>
>                 Key: GIRAPH-1187
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-1187
>             Project: Giraph
>          Issue Type: Bug
>          Components: graph
>    Affects Versions: 1.2.0
>         Environment: Giraph 1.2.0 running in M/R on Hadoop 2.6
>            Reporter: Randy Hu
>            Priority: Critical
>
> Likely the GC notification happened before any super step, in which case "
> gcTimeMetric" is not initialized at all. Here is stack trace:
>  
> java.lang.NullPointerException at org.apache.giraph.graph.GraphTaskManager$1.handleNotification(GraphTaskManager.java:667) at sun.management.NotificationEmitterSupport.sendNotification(NotificationEmitterSupport.java:156) at sun.management.GarbageCollectorImpl.createGCNotification(GarbageCollectorImpl.java:143)



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