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From "Pranay Singh (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-13868) WebHDFS: GETSNAPSHOTDIFF API NPE when param "snapshotname" is given but "oldsnapshotname" is not.
Date Thu, 06 Sep 2018 03:11:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pranay Singh updated HDFS-13868:
--------------------------------
    Status: Patch Available  (was: In Progress)

> 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: hdfs, webhdfs
>    Affects Versions: 3.0.3, 3.1.0
>            Reporter: Siyao Meng
>            Assignee: Pranay Singh
>            Priority: Major
>         Attachments: HDFS-13868.001.patch, HDFS-13868.002.patch, HDFS-13868.003.patch
>
>
> HDFS-13052 implements GETSNAPSHOTDIFF for WebHDFS.
>  
> Proof:
> {code:java}
> # Bash
> # Prerequisite: You will need to create the directory "/snapshot", allowSnapshot() on
it, and create a snapshot named "snap3" for it to reach NPE.
> $ 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"
> # Empty string for oldsnapshotname
> {"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException","message":null}}
> # OR
> $ curl "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=GETSNAPSHOTDIFF&user.name=hdfs&snapshotname=snap3"
> # Missing param oldsnapshotname, essentially the same as the first case.
> {"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException","message":null}{code}



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