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https://issues.apache.org/jira/browse/STORM-3211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16853634#comment-16853634
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Stig Rohde Døssing commented on STORM-3211:
-------------------------------------------
Most likely the right thing to do here is to check for null, and return an
empty configuration instead.
> 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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