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https://issues.apache.org/jira/browse/FLINK-2391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14636776#comment-14636776
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ASF GitHub Bot commented on FLINK-2391:
---------------------------------------
Github user mjsax commented on a diff in the pull request:
https://github.com/apache/flink/pull/932#discussion_r35205049
--- Diff:
flink-contrib/flink-storm-compatibility/flink-storm-compatibility-core/src/main/java/org/apache/flink/stormcompatibility/api/FlinkTopologyBuilder.java
---
@@ -138,6 +138,21 @@ public FlinkTopology createTopology() {
DataStream<?> inputDataStream =
availableOperators.get(producerId);
if (inputDataStream != null) {
+ // get upstream operator
--- End diff --
Move this code with the `if (grouping.is_set_fields())` then-Block (line
161). Introduce local variable and look up declarer in introduced HashMap:
`FlinkOutputFieldsDeclarer d = this.declarers.get(producerId)`
> Storm-compatibility:method FlinkTopologyBuilder.createTopology() throws
> java.lang.NullPointerException
> ------------------------------------------------------------------------------------------------------
>
> Key: FLINK-2391
> URL: https://issues.apache.org/jira/browse/FLINK-2391
> Project: Flink
> Issue Type: Bug
> Components: flink-contrib
> Affects Versions: 0.10
> Environment: win7 32bit;linux
> Reporter: Huang Wei
> Labels: features
> Fix For: 0.10
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> core dumped at FlinkOutputFieldsDeclarer.java : 160(package
> FlinkOutputFieldsDeclarer).
> code : fieldIndexes[i] = this.outputSchema.fieldIndex(groupingFields.get(i));
> in this line, the var this.outputSchema may be null.
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