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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-13892) Scanner with all results filtered out results in NPE
Date Fri, 12 Jun 2015 02:29:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-13892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-13892:
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 1.0.2
                   0.98.14
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

Committed to >= 0.98: new test plus fix to 1.1+, only new test to 0.98 and 1.0. New test
passes on all branches. 

I amended the tests to use try-with-resources (for 0.98, try-finally) to clean up resources
as Ted suggested.

Happy to help with the branch porting mechanics [~elserj], thanks for finding and fixing this.

> Scanner with all results filtered out results in NPE
> ----------------------------------------------------
>
>                 Key: HBASE-13892
>                 URL: https://issues.apache.org/jira/browse/HBASE-13892
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 1.1.0
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>            Priority: Critical
>             Fix For: 2.0.0, 0.98.14, 1.0.2, 1.2.0, 1.1.1
>
>         Attachments: HBASE-13892.patch
>
>
> Saw a failure during some testing with region_mover.rb
> {code}
> NativeException: java.lang.NullPointerException: null
>         __ensure__ at /usr/hdp/current/hbase-master/bin/region_mover.rb:110
>   isSuccessfulScan at /usr/hdp/current/hbase-master/bin/region_mover.rb:109
>   isSuccessfulScan at /usr/hdp/current/hbase-master/bin/region_mover.rb:104
>      unloadRegions at /usr/hdp/current/hbase-master/bin/region_mover.rb:328
> {code}
> To try to get a real stacktrace, I wrote a simple test. Turns out, it was really simple
to just produce the NPE within ClientScanner.
> {code}
> java.lang.NullPointerException: null
> 	at org.apache.hadoop.hbase.client.ClientScanner.getResultsToAddToCache(ClientScanner.java:576)
> 	at org.apache.hadoop.hbase.client.ClientScanner.loadCache(ClientScanner.java:492)
> 	at org.apache.hadoop.hbase.client.ClientScanner.next(ClientScanner.java:364)
> {code}
> Patch with fix and test incoming.



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