[FLINK-15418] StreamExecMatchRule not set FlinkRelDistribution

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9.1, 1.10.0
• Fix Version/s: 1.9.2, 1.10.0
• Component/s: Table SQL / Planner
• Labels: pull-request-available
• Assignee: Benchao Li
• Reporter: Benchao Li
• Created: 27/Dec/19 06:59
• Updated: 12/Mar/20 13:33
• Resolved: 31/Dec/19 01:41

Description

StreamExecMatchRule forgets to set FlinkRelDistribution. When match clause with `partition by`, and parallelism > 1, will result in following exception:

```
Caused by: java.lang.NullPointerException
at org.apache.flink.runtime.state.heap.StateTable.put(StateTable.java:336)
at org.apache.flink.runtime.state.heap.StateTable.put(StateTable.java:159)
at org.apache.flink.runtime.state.heap.HeapMapState.put(HeapMapState.java:100)
at org.apache.flink.runtime.state.UserFacingMapState.put(UserFacingMapState.java:52)
at org.apache.flink.cep.nfa.sharedbuffer.SharedBuffer.registerEvent(SharedBuffer.java:141)
at org.apache.flink.cep.nfa.sharedbuffer.SharedBufferAccessor.registerEvent(SharedBufferAccessor.java:74)
at org.apache.flink.cep.nfa.NFA$EventWrapper.getEventId(NFA.java:483)
at org.apache.flink.cep.nfa.NFA.computeNextStates(NFA.java:605)
at org.apache.flink.cep.nfa.NFA.doProcess(NFA.java:292)
at org.apache.flink.cep.nfa.NFA.process(NFA.java:228)
at org.apache.flink.cep.operator.CepOperator.processEvent(CepOperator.java:420)
at org.apache.flink.cep.operator.CepOperator.processElement(CepOperator.java:242)
at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:173)
at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:151)
at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:128)
at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:69)
at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:311)
at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:187)
at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:488)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:470)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:702)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:527)
at java.lang.Thread.run(Thread.java:748)
```

Issue Links

• links to: GitHub Pull Request #10706