Seth Wiesman created FLINK-13541:
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Summary: State Processor Api sets the wrong key selector when writing savepoints
Key: FLINK-13541
URL:
https://issues.apache.org/jira/browse/FLINK-13541 Project: Flink
Issue Type: Bug
Components: API / DataStream, Runtime / State Backends
Reporter: Seth Wiesman
Fix For: 1.9.0, 1.10.0
The state processor api is setting the wrong key selector for its StreamConfig when writing savepoints. It uses two key selectors internally that happen to output the same value for integer keys but not in general.
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Caused by: java.lang.RuntimeException: Exception occurred while setting the current key context.
at org.apache.flink.streaming.api.operators.AbstractStreamOperator.setCurrentKey(AbstractStreamOperator.java:641)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator.setKeyContextElement(AbstractStreamOperator.java:627)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator.setKeyContextElement1(AbstractStreamOperator.java:615)
at org.apache.flink.state.api.output.BoundedStreamTask.performDefaultAction(BoundedStreamTask.java:83)
at org.apache.flink.streaming.runtime.tasks.mailbox.execution.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:140)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:378)
at org.apache.flink.state.api.output.BoundedOneInputStreamTaskRunner.mapPartition(BoundedOneInputStreamTaskRunner.java:76)
at org.apache.flink.runtime.operators.MapPartitionDriver.run(MapPartitionDriver.java:103)
at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:504)
at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:369)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:688)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:518)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at org.apache.flink.api.common.typeutils.base.StringSerializer.serialize(StringSerializer.java:33)
at org.apache.flink.contrib.streaming.state.RocksDBSerializedCompositeKeyBuilder.serializeKeyGroupAndKey(RocksDBSerializedCompositeKeyBuilder.java:159)
at org.apache.flink.contrib.streaming.state.RocksDBSerializedCompositeKeyBuilder.setKeyAndKeyGroup(RocksDBSerializedCompositeKeyBuilder.java:96)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend.setCurrentKey(RocksDBKeyedStateBackend.java:303)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator.setCurrentKey(AbstractStreamOperator.java:639)
... 12 more
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