GitHub user deem0n opened a pull request:

    https://github.com/apache/incubator-hawq/pull/1329

    fix logging issue with null Metadata

    When you enable DEBUG logging you might get annoying exceptions:
    ```
    SEVERE: The RuntimeException could not be mapped to a response, re-throwing 
to the HTTP container
    java.lang.NullPointerException
            at java.lang.String.<init>(String.java:566)
            at 
org.apache.hawq.pxf.service.FragmentsResponseFormatter.printList(FragmentsResponseFormatter.java:147)
            at 
org.apache.hawq.pxf.service.FragmentsResponseFormatter.formatResponse(FragmentsResponseFormatter.java:54)
            at 
org.apache.hawq.pxf.service.rest.FragmenterResource.getFragments(FragmenterResource.java:88)
    ```
     I just added the trivial fix.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/deem0n/incubator-hawq master

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-hawq/pull/1329.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1329
    
----
commit 2f731a310d945f0422d274f687f16f8d381456aa
Author: deem0n <dima@...>
Date:   2018-01-13T08:49:55Z

    fix logging issue with null Metadata
    
    When you enable DEBUG logging you might get annoying exceptions:
    ```
    SEVERE: The RuntimeException could not be mapped to a response, re-throwing 
to the HTTP container
    java.lang.NullPointerException
            at java.lang.String.<init>(String.java:566)
            at 
org.apache.hawq.pxf.service.FragmentsResponseFormatter.printList(FragmentsResponseFormatter.java:147)
            at 
org.apache.hawq.pxf.service.FragmentsResponseFormatter.formatResponse(FragmentsResponseFormatter.java:54)
            at 
org.apache.hawq.pxf.service.rest.FragmenterResource.getFragments(FragmenterResource.java:88)
    ```
     I just added the trivial fix.

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