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From "Aldrin Piri (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NIFI-831) GetTwitter can throw NullPointerException if modifying properties without scheduling to run first
Date Sun, 09 Aug 2015 15:50:46 GMT

    [ https://issues.apache.org/jira/browse/NIFI-831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14679182#comment-14679182
] 

Aldrin Piri commented on NIFI-831:
----------------------------------

Please correct me if I'm wrong, but to clarify, the issue in this case was that the processor
was initialized but never scheduled, and then additional changes were made triggering the
NPE due to the message queue never being instantiated?

Patch looks good to remedy that problem, +1.

> GetTwitter can throw NullPointerException if modifying properties without scheduling
to run first
> -------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-831
>                 URL: https://issues.apache.org/jira/browse/NIFI-831
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Critical
>             Fix For: 0.3.0
>
>         Attachments: 0001-NIFI-831-NIFI-799-Fixed-a-NullPointerException-use-a.patch
>
>
> We've seen a NPE get thrown when modifying properties for the GetTwitter Processor:
> 2015-08-08 14:02:57,299 ERROR [NiFi Web Server-18] o.a.nifi.web.api.config.ThrowableMapper
An unexpected error has occurred: java.lang.NullPointerException. Returning Internal Server
Error response.
> java.lang.NullPointerException: null
>         at org.apache.nifi.processors.twitter.GetTwitter.onPropertyModified(GetTwitter.java:204)
~[na:na]



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