[HDFS-7599] Add more information to exception msg when pipeline recovery fails

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.6.0
• Component/s: hdfs-client
• Labels: supportability
• Assignee: Yongjun Zhang
• Reporter: Yongjun Zhang
• Created: 11/Jan/15 16:56
• Updated: 01/Apr/15 19:27

Description

When pipeline recovery fails with the following exception, can not easily identify the associated file and block, propose to add the info for better debuggability:

java.io.IOException: All datanodes <...> are bad. Aborting...
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1127)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:924)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:486)