lccbiluox2 commented on issue #2894:
URL: https://github.com/apache/flink/pull/2894#issuecomment-617728235
然后还报错这个
```
java.lang.RuntimeException: Row arity of from does not match serializers.
at
org.apache.flink.api.java.typeutils.runtime.RowSerializer.copy(RowSerializer.java:86)
at
org.apache.flink.api.java.typeutils.runtime.RowSerializer.copy(RowSerializer.java:44)
at
org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:635)
at
org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:612)
at
org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:592)
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:727)
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:705)
at
org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
at
com.dbapp.baas.engine.common.etl.filterlabel.FilterLabel.processElement2(FilterLabel.java:241)
at
com.dbapp.baas.engine.common.etl.filterlabel.FilterLabel.processElement2(FilterLabel.java:29)
at
org.apache.flink.streaming.api.operators.co.CoProcessOperator.processElement2(CoProcessOperator.java:77)
at
org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor.processInput(StreamTwoInputProcessor.java:286)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:279)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.run(StreamTask.java:301)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:406)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:705)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:530)
at java.lang.Thread.run(Thread.java:745)
```
找不到原因呀
参考：https://blog.csdn.net/qq_21383435/article/details/105647242
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