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https://issues.apache.org/jira/browse/FLINK-13541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen closed FLINK-13541.
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> 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
> Assignee: Seth Wiesman
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.9.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> 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.
> {noformat}
> 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
> {noformat}
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