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https://issues.apache.org/jira/browse/STORM-1051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876667#comment-14876667
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Jungtaek Lim commented on STORM-1051:
-------------------------------------
It could occur easily, and the result is shown as strange worker dying. So
changing priority to critical.
> Netty Client.java's flushMessages produces a NullPointerException
> -----------------------------------------------------------------
>
> Key: STORM-1051
> URL: https://issues.apache.org/jira/browse/STORM-1051
> Project: Apache Storm
> Issue Type: Bug
> Affects Versions: 0.10.0, 0.9.6
> Reporter: Michael Schonfeld
> Assignee: Michael Schonfeld
> Priority: Critical
>
> STORM-763 replaced `return batch != null && !batch.isEmpty();` with
> `if(batch.isEmpty())`... which means that if batch == null, a
> NullPointerException is thrown. Problem is, batch is often null, which means
> that 763 made Storm unusable...
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