Caizhi Weng created FLINK-17080:
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Summary: Utils.CollectHelper is possible to throw NPE if the sink
is up but not initialized when the job fails
Key: FLINK-17080
URL: https://issues.apache.org/jira/browse/FLINK-17080
Project: Flink
Issue Type: Bug
Components: API / DataSet
Affects Versions: 1.11.0
Reporter: Caizhi Weng
When the sink using {{Utils.CollectHelper}} is up but not initialized and the
job fails due to other operators, it is possible that the {{close()}} method of
{{Utils.CollectHelper}} is called when {{open()}} is not called.
Currently {{Utils.CollectHelper}} does not deal with this case and will throw
NPE.
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