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https://issues.apache.org/jira/browse/NIFI-4153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075407#comment-16075407
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ASF GitHub Bot commented on NIFI-4153:
--------------------------------------
Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/1980
Will review...
> Site-to-Site causing "There are too many outstanding HTTP requests" error
> message
> ---------------------------------------------------------------------------------
>
> Key: NIFI-4153
> URL: https://issues.apache.org/jira/browse/NIFI-4153
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.2.0, 1.3.0
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Critical
> Fix For: 1.4.0
>
>
> When using site-to-site in cluster, we sometimes see the following error
> message showing up in the log:
> {code}
> 2017-07-05 16:11:12,452 INFO [NiFi Web Server-318]
> o.a.n.w.a.c.IllegalStateExceptionMapper java.lang.IllegalStateException:
> There are too many outstanding HTTP requests with a total 100 outstanding
> requests. Returning Conflict response.
> {code}
> Once this occurs, it keeps occurring, sometimes making the UI unusable until
> the nodes are restarted.
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