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https://issues.apache.org/jira/browse/NIFI-1153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15003510#comment-15003510
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ASF subversion and git services commented on NIFI-1153:
-------------------------------------------------------

Commit 0900fb80c9deaf96d17c72683b9b4886b44d6180 in nifi's branch 
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=0900fb8 ]

NIFI-1153: If no incoming FlowFile, don't try to transfer null

Reviewed by Bryan Bende ([email protected])
Amended based on review (change to a log message) by Tony Kurc 
([email protected])


> ExecuteSQL logs errors about FlowFileHandlingException
> ------------------------------------------------------
>
>                 Key: NIFI-1153
>                 URL: https://issues.apache.org/jira/browse/NIFI-1153
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>             Fix For: 0.4.0
>
>         Attachments: 
> 0001-NIFI-1153-If-no-incoming-FlowFile-don-t-try-to-trans.patch
>
>
> If ExecuteSQL is configured with no incoming connections and is unable to 
> obtain a connection to the database via the controller service, it creates a 
> lot of less messages of the form:
> 2015-11-11 11:36:43,885 ERROR [Timer-Driven Process Thread-9] 
> o.a.nifi.processors.standard.ExecuteSQL 
> ExecuteSQL[id=f6563742-585a-4109-91c9-613deca6bd8a] Failed to process session 
> due to org.apache.nifi.processor.exception.FlowFileHandlingException: null is 
> not known in this session (StandardProcessSession[id=84]): 
> org.apache.nifi.processor.exception.FlowFileHandlingException: null is not 
> known in this session (StandardProcessSession[id=84])



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