tillrohrmann commented on a change in pull request #10120: [FLINK-14646] Check
non-null for key in KeyGroupStreamPartitioner
URL: https://github.com/apache/flink/pull/10120#discussion_r343915476
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/partitioner/KeyGroupStreamPartitioner.java
##########
@@ -55,6 +55,7 @@ public int
selectChannel(SerializationDelegate<StreamRecord<T>> record) {
} catch (Exception e) {
throw new RuntimeException("Could not extract key from
" + record.getInstance().getValue(), e);
}
+ Preconditions.checkNotNull(key, "HASH key must not be null!");
Review comment:
Should we move this check into the `KeyGroupRangeAssignment`? Then every
caller can benefit from them.
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