[jira] [Commented] (NIFI-13436) MiNiFi C2 Flow update - Queue is dropped even component exists in the proposed flow

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-13436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17860719#comment-17860719 ] 

ASF subversion and git services commented on NIFI-13436:
--------------------------------------------------------

Commit 903090b64956a7afbc9de37c80a64166880483e6 in nifi's branch refs/heads/main from Ferenc Erdei
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=903090b649 ]

NIFI-13436 Retain queue for non-modified connections during MiNiFi flow update

This closes #8998.

Signed-off-by: Ferenc Kis <br...@gmail.com>


> MiNiFi C2 Flow update - Queue is dropped even component exists in the proposed flow
> -----------------------------------------------------------------------------------
>
>                 Key: NIFI-13436
>                 URL: https://issues.apache.org/jira/browse/NIFI-13436
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: MiNiFi
>    Affects Versions: 2.0.0-M3
>            Reporter: Ferenc Erdei
>            Assignee: Ferenc Erdei
>            Priority: Minor
>              Labels: minifi-java
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> h2. Issue
> When we propose a new flow for a running MiNiFi instance it first stop the source processors and try to wait until a pre-defined graceful period to have empty queues. If remaining items are in the queues after this period, the given flowfiles are dropped.
> This behaviour may cause data loss if the proposed flow contains some existing components.
> h2. Proposed solution
> After the graceful period expires, we should drop flowfiles only from those queues, that don't exist in the proposed flow.



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