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https://issues.apache.org/jira/browse/NIFI-10051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17547510#comment-17547510
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ASF subversion and git services commented on NIFI-10051:
--------------------------------------------------------
Commit 35d8bb5ca95c077268f5b442222e3086cfd97377 in nifi's branch
refs/heads/dependabot/maven/nifi-nar-bundles/nifi-standard-services/nifi-hbase_1_1_2-client-service-bundle/org.apache.hadoop-hadoop-common-3.2.3
from Mark Payne
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=35d8bb5ca9 ]
NIFI-10051: Clear Controller Services' state in a background thread instead of
the web thread.
Signed-off-by: Matthew Burgess <[email protected]>
This closes #6078
> When a Controller Service is removed, its state should be cleared in a
> background thread
> ----------------------------------------------------------------------------------------
>
> Key: NIFI-10051
> URL: https://issues.apache.org/jira/browse/NIFI-10051
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Major
> Fix For: 1.17.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Currently, when a Processor is removed from the canvas, the State Manager's
> onComponentRemoved method is called. This is called in a synchronous/blocking
> manner. By default, the timeout to communicate with ZooKeeper is 30 seconds.
> There are cases when the request can time out (for instance, due to improper
> Kerberos configuration), and with a 30 second timeout, this often results in
> nodes getting kicked out of the cluster.
> However, if the request fails, we simply log a warning and move on. As a
> result, this synchronous network call should be moved to a background thread
> to ensure that it does not interfere with the web request to remove the
> component.
> This already was done in NIFI-1606 for Processors but it never got done for
> Controller Services. We should do this for controller services as well.
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