[jira] [Created] (HDFS-13868) WebHDFS: GETSNAPSHOTDIFF API NPE when param "snapshotname" is given but "oldsnapshotname" is not.

["Siyao Meng (JIRA)" <ji...@apache.org>]

Siyao Meng created HDFS-13868:
---------------------------------

             Summary: WebHDFS: GETSNAPSHOTDIFF API NPE when param "snapshotname" is given but "oldsnapshotname" is not.
                 Key: HDFS-13868
                 URL: https://issues.apache.org/jira/browse/HDFS-13868
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: webhdfs
            Reporter: Siyao Meng


Proof:
{code:java}
# Bash

$ curl "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=GETSNAPSHOTDIFF&user.name=hdfs&oldsnapshotnameZZZ=snap2&snapshotname=snap3"
# Note that I intentionally typed the wrong parameter name for "oldsnapshotname" above to cause NPE.

{"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException","message":null}}


# OR

$ curl "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=GETSNAPSHOTDIFF&user.name=hdfs&oldsnapshotname=&snapshotname=snap3"

{"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException","message":null}}


# OR

$ curl "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=GETSNAPSHOTDIFF&user.name=hdfs&snapshotname=snap3"

{"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException","message":null}{code}



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