[jira] [Created] (HDFS-5939) WebHdfs returns misleading error code and logs nothing if trying to create a file with no DNs in cluster

["Yongjun Zhang (JIRA)" <ji...@apache.org>]

Yongjun Zhang created HDFS-5939:
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             Summary: WebHdfs returns misleading error code and logs nothing if trying to create a file with no DNs in cluster
                 Key: HDFS-5939
                 URL: https://issues.apache.org/jira/browse/HDFS-5939
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs-client
    Affects Versions: 2.3.0
            Reporter: Yongjun Zhang


When trying to access hdfs via webhdfs, and when datanode is dead, user will see an exception below without any clue that it's caused by dead datanode:

$ curl -i -X PUT ".../webhdfs/v1/t1?op=CREATE&user.name=<userName>&overwrite=false"

...
{"RemoteException":{"exception":"IllegalArgumentException","javaClassName":"java.lang.IllegalArgumentException","message":"n must be positive"}}

Need to fix the report to give user hint about dead datanode.




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