[FLINK-7369] Add more information for `Key group index out of range of key group range` exception

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: Runtime / Task
• Assignee: Benedict Jin
• Reporter: Benedict Jin
• Created: 04/Aug/17 07:58
• Updated: 24/Jul/18 13:11
• Resolved: 24/Jul/18 13:11

Description

When i got the following exception log, it make me confused that the index is more than `32` or less than `16`. So, we should add more information for it.

```java
java.lang.IllegalArgumentException: Key group index out of range of key group range [16, 32).
at org.apache.flink.runtime.state.heap.NestedMapsStateTable.setMapForKeyGroup(NestedMapsStateTable.java:104)
at org.apache.flink.runtime.state.heap.NestedMapsStateTable.putAndGetOld(NestedMapsStateTable.java:218)
at org.apache.flink.runtime.state.heap.NestedMapsStateTable.put(NestedMapsStateTable.java:207)
at org.apache.flink.runtime.state.heap.NestedMapsStateTable.put(NestedMapsStateTable.java:145)
at org.apache.flink.runtime.state.heap.HeapValueState.update(HeapValueState.java:72)
at org.apache.flink.cep.operator.AbstractKeyedCEPPatternOperator.updateNFA(AbstractKeyedCEPPatternOperator.java:276)
at org.apache.flink.cep.operator.AbstractKeyedCEPPatternOperator.processElement(AbstractKeyedCEPPatternOperator.java:171)
at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:206)
at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:69)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:263)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:702)
at java.lang.Thread.run(Thread.java:745)
```

Issue Links

• links to: GitHub Pull Request #4474