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https://issues.apache.org/jira/browse/NIFI-15888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18083420#comment-18083420
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Joerg commented on NIFI-15888:
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Hi [~exceptionfactory]
is this Bug/Limitiation worth to be handled in Version 2.10 or much later?
> NiFI UI freezes and stays unresponsible when opening big content in
> content-viewer
> ----------------------------------------------------------------------------------
>
> Key: NIFI-15888
> URL: https://issues.apache.org/jira/browse/NIFI-15888
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core UI
> Affects Versions: 2.6.0, 2.8.0
> Environment: Linux ; Java 21
> Reporter: Joerg
> Priority: Major
> Attachments: Screenshot 2026-04-28 152928.png, Screenshot 2026-04-28
> 153058.png
>
>
> The NiFi UI gets permanently unresponsible with the content-viewer when
> opening a FlowFile content with bigger size (e.g. 600 MB).
> Problem scenario :
> The NiFi UI freezes after some Frontend activities working with bigger files.
> Here i used one file size of 600MB and did : * Open queue list or data
> provenance and open the (big) content via "View Content" with the
> content-viewer
> * View Type "hex" limits the displayed content to 10KB. But when i change to
> "text" or "json" the UI freezes after some time
> * Sometimes the UI recovers after some minutes, sometimes not - then i have
> to restart some cluster nodes and everything recovers
>
> The NiFi API keeps responsive and the flows are still working.
> This was tested with the following environments:
> a) NiFi Version 2.8.0 ; Ubuntu linux; Java 21 ; OnPrem One Node Cluster with
> zookeeper 3.9.3
> b) NiFi Version 2.6.0 ; Red Hat Linux ; Java 21 ; three node cluster zookeeper
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