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https://issues.apache.org/jira/browse/ASTERIXDB-1330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yingyi Bu resolved ASTERIXDB-1330.
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Resolution: Fixed
> NPE in ExternalGroupByOperator for open types
> ---------------------------------------------
>
> Key: ASTERIXDB-1330
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-1330
> Project: Apache AsterixDB
> Issue Type: Bug
> Reporter: Yingyi Bu
> Assignee: Yingyi Bu
>
> The NPE results from the assumption that normalizedKeyComputerFactory can
> never be null:
> https://github.com/apache/incubator-asterixdb-hyracks/blob/master/hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/group/external/ExternalGroupBuildOperatorNodePushable.java#L74
> https://github.com/apache/incubator-asterixdb-hyracks/blob/master/hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/group/external/ExternalGroupWriteOperatorNodePushable.java#L67
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