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https://issues.apache.org/jira/browse/FLINK-3914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15289647#comment-15289647
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ASF GitHub Bot commented on FLINK-3914:
---------------------------------------
Github user fhueske commented on the pull request:
https://github.com/apache/flink/pull/2000#issuecomment-220133139
Merging
> BlobServer.createTemporaryFilename() has concurrency safety problem
> -------------------------------------------------------------------
>
> Key: FLINK-3914
> URL: https://issues.apache.org/jira/browse/FLINK-3914
> Project: Flink
> Issue Type: Bug
> Reporter: ZhengBowen
> Assignee: Mark Reddy
>
> When JobManager just started to receive multiple concurrent
> requests,BlobServer.createTemporaryFilename() has concurrency safety problem.
> Exception:
> ```
> [2016-05-13 10:53:10.262] [BLOB connection for /xx.xx.xx.xx:55231] ERROR
> org.apache.flink.runtime.blob.BlobServerConnection - PUT operation failed
> java.lang.RuntimeException: Cannot create directory for incoming files
> D:\RDSWorkSpace\computing-rc\target\test\tmp\blobs\blobStore-63d1bef5-d92c-4a24-bf34-ff9c23046b71\incoming
> at
> org.apache.flink.runtime.blob.BlobUtils.getIncomingDirectory(BlobUtils.java:112)
> ~[flink-runtime-rds-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
> at
> org.apache.flink.runtime.blob.BlobServer.createTemporaryFilename(BlobServer.java:217)
> ~[flink-runtime-rds-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
> at
> org.apache.flink.runtime.blob.BlobServerConnection.put(BlobServerConnection.java:296)
> [flink-runtime-rds-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
> at
> org.apache.flink.runtime.blob.BlobServerConnection.run(BlobServerConnection.java:109)
> [flink-runtime-rds-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT]
> ```
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