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https://issues.apache.org/jira/browse/STORM-3211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16958939#comment-16958939
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Stig Rohde Døssing commented on STORM-3211:
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It still looks like an issue to me. Take a look at
https://github.com/apache/storm/blob/925422a5b5ad1c3329a2c2b44db460ae94f70806/storm-client/src/jvm/org/apache/storm/topology/WindowedBoltExecutor.java#L339.
> WindowedBoltExecutor NPE if wrapped bolt returns null from
> getComponentConfiguration
> ------------------------------------------------------------------------------------
>
> Key: STORM-3211
> URL: https://issues.apache.org/jira/browse/STORM-3211
> Project: Apache Storm
> Issue Type: Task
> Components: storm-client, storm-core
> Affects Versions: 2.0.0, 1.2.2
> Reporter: Stig Rohde Døssing
> Priority: Major
> Labels: newbie
>
> {code}
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.storm.topology.WindowedBoltExecutor.declareOutputFields(WindowedBoltExecutor.java:309)
> at
> org.apache.storm.topology.TopologyBuilder.getComponentCommon(TopologyBuilder.java:432)
> at
> org.apache.storm.topology.TopologyBuilder.createTopology(TopologyBuilder.java:120)
> at Main.main(Main.java:23)
> {code}
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