[jira] [Commented] (NIFI-1155) Processor stops running if its destination applies backpressure and expiration occurs

["Joseph Witt (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-1155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15003394#comment-15003394 ] 

Joseph Witt commented on NIFI-1155:
-----------------------------------

will dive in now


> Processor stops running if its destination applies backpressure and expiration occurs
> -------------------------------------------------------------------------------------
>
>                 Key: NIFI-1155
>                 URL: https://issues.apache.org/jira/browse/NIFI-1155
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>    Affects Versions: 0.4.0
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Blocker
>             Fix For: 0.4.0
>
>         Attachments: 0001-NIFI-1155-Ensure-that-when-poll-FlowFileFilter-Set-i.patch, 0002-NIFI-1155-Refactored-StandardFlowFileQueue-to-update.patch
>
>
> If we setup a flow where Processor A is connected to Processor B and set backpressure to say 200 FlowFiles, all works well. If we then apply an ageoff (say 15 seconds) and start the Processors, all works well. 
> Then stop Processor B so that the queue applies backpressure.
> Leave Processor B stopped long enough for the expiration to occur.
> The queue is now emptied, but Processor A does not continue to run.
> It appears that when FlowFiles are expired while the queue is full, the queue still thinks it is full.



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