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https://issues.apache.org/jira/browse/FLINK-7127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16088821#comment-16088821
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ASF GitHub Bot commented on FLINK-7127:
---------------------------------------
Github user mylog00 commented on the issue:
https://github.com/apache/flink/pull/4349
Link to passed tests build:
https://travis-ci.org/mylog00/flink/builds/253949055
> Remove unnecessary null check or add null check
> -----------------------------------------------
>
> Key: FLINK-7127
> URL: https://issues.apache.org/jira/browse/FLINK-7127
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Reporter: Ufuk Celebi
> Priority: Trivial
> Labels: starter
>
> In {{HeapKeyedStateBackend#snapshot}} we have:
> {code}
> for (Map.Entry<String, StateTable<K, ?, ?>> kvState : stateTables.entrySet())
> {
> // 1) Here we don't check for null
> metaInfoSnapshots.add(kvState.getValue().getMetaInfo().snapshot());
> kVStateToId.put(kvState.getKey(), kVStateToId.size());
> // 2) Here we check for null
> StateTable<K, ?, ?> stateTable = kvState.getValue();
> if (null != stateTable) {
> cowStateStableSnapshots.put(stateTable,
> stateTable.createSnapshot());
> }
> }
> {code}
> Either this can lead to a NPE and we should check it in 1) or we remove the
> null check in 2).
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