[FLINK-3914] BlobServer.createTemporaryFilename() has concurrency safety problem

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.4, 1.1.0
• Assignee: Mark Reddy
• Reporter: ZhengBowen
• Created: 16/May/16 03:54
• Updated: 18/May/16 22:24
• Resolved: 18/May/16 22:24

Description

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]

```

Issue Links

• links to: GitHub Pull Request #2000