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https://issues.apache.org/jira/browse/FLINK-15533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011570#comment-17011570
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Zili Chen commented on FLINK-15533:
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>From my understanding if parallelism > 1, actually a number of files under the
>configured path({{/tmp/output}} here) will be created. So the effective
>parallelism in the case is significant.
> Writing DataStream as text file fails due to output path already exists
> -----------------------------------------------------------------------
>
> Key: FLINK-15533
> URL: https://issues.apache.org/jira/browse/FLINK-15533
> Project: Flink
> Issue Type: Bug
> Reporter: Rui Li
> Priority: Major
>
> The following program reproduces the issue.
> {code}
> Configuration configuration = GlobalConfiguration.loadConfiguration();
> configuration.set(DeploymentOptions.TARGET, RemoteExecutor.NAME);
> StreamExecutionEnvironment streamEnv = new
> StreamExecutionEnvironment(configuration);
> DataStream dataStream = streamEnv.fromCollection(Arrays.asList(1,2,3));
> dataStream.writeAsText("hdfs://localhost:8020/tmp/output");
> streamEnv.execute();
> {code}
> The job will fail with the follow error, even though the output path doesn't
> exist before job submission:
> {noformat}
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.fs.FileAlreadyExistsException):
> /tmp/output already exists as a directory
> {noformat}
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