ZhengBowen created FLINK-3914:
---------------------------------
Summary: 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
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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