Github user pnowojski commented on the issue:
https://github.com/apache/flink/pull/3844
Are you sure that errors in travis are intermittent or unrelated to your
change? One is already reported here:
https://issues.apache.org/jira/browse/FLINK-6843 but second one I'm not sure:
```
Tests run: 10, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 6.933 sec
<<< FAILURE! - in org.apache.flink.runtime.state.OperatorStateBackendTest
testSnapshotAsyncCancel(org.apache.flink.runtime.state.OperatorStateBackendTest)
Time elapsed: 0.061 sec <<< ERROR!
java.util.concurrent.ExecutionException: java.io.IOException: Stream closed.
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at
org.apache.flink.runtime.state.OperatorStateBackendTest.testSnapshotAsyncCancel(OperatorStateBackendTest.java:636)
Caused by: java.io.IOException: Stream closed.
at
org.apache.flink.runtime.util.BlockerCheckpointStreamFactory$1.write(BlockerCheckpointStreamFactory.java:95)
at java.io.DataOutputStream.writeInt(DataOutputStream.java:197)
at
org.apache.flink.core.io.VersionedIOReadableWritable.write(VersionedIOReadableWritable.java:40)
at
org.apache.flink.runtime.state.OperatorBackendSerializationProxy.write(OperatorBackendSerializationProxy.java:65)
at
org.apache.flink.runtime.state.DefaultOperatorStateBackend$1.performOperation(DefaultOperatorStateBackend.java:255)
at
org.apache.flink.runtime.state.DefaultOperatorStateBackend$1.performOperation(DefaultOperatorStateBackend.java:233)
at
org.apache.flink.runtime.io.async.AbstractAsyncIOCallable.call(AbstractAsyncIOCallable.java:72)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
```
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