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https://issues.apache.org/jira/browse/NIFI-8423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17325674#comment-17325674
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Josef Zahner commented on NIFI-8423:
------------------------------------
Ok, so at least the smoke test showed that the UI on the top right shows now
the correct CEST time. However, the problem persists that within logmessages in
the GUI we see two different timezones within the cluster. The nifi-app.log
shows the correct timezone (which is clearly different in the UI!).
Please have a look at the first timestamp 09:03:00 from p-li-nifi-05 which is 2
hours before the other error messages.
!manual_configured_timezone_gui_output.png|width=761,height=569!
nifi-app.log shows the same entry with the correct time - 11:03:00 instead of
09:03:00. So this approves that the system time of p-li-nifi-05 is or was
correct. And at the same time I've checked on the top right the GUI time on
p-li-nifi-05, it showed correctly the 11:03:xx CEST.
!nifi-app_log.png!
Additionally, when I recorded the screenshot of the UI where the ERRORs on the
PG appeared, the global messages icon on the top right didn't show any info at
all!
It's really a mess here and it does appear in our case only on the cluster.
> Timezone wrong in UI for an 8 node cluster
> ------------------------------------------
>
> Key: NIFI-8423
> URL: https://issues.apache.org/jira/browse/NIFI-8423
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core UI
> Affects Versions: 1.13.2
> Environment: 8 Node NiFi Cluster on CentOS 7
> OpenJDK 1.8.0_282
> Local timezone: Europe/Zurich (CEST or UTC+2h)
> Reporter: Josef Zahner
> Priority: Critical
> Labels: centos, cluster, openjdk, timezone
> Attachments: image-2021-04-13-15-14-02-162.png,
> image-2021-04-13-15-14-06-930.png, image-2021-04-13-15-14-56-690.png,
> manual_configured_timezone_gui_output.png, nifi-app_log.png
>
>
> We just upgraded to NiFi 1.13.2 and Java 1.8.0_282
> On our 8 node NiFi 1.13.2 cluster with timezone Europe/Zurich (CEST/CET), we
> have the issue that the UI does display the correct timezone (CEST, so UTC
> +2h), but in fact the time is displayed as UTC. NTP is enabled and working.
> The OS configuration/location is everywhere the same (doesn't matter if
> single or cluster NiFi). My tests below are all done at around 15:xx:xx local
> time (CEST).
> As you can see below, the timezone seems to be correct, but the time itself
> within NiFi is 2h behind (so in fact UTC) compared to Windows. In earlier
> NiFi/java versions it was enough to multiple times restart the cluster, but
> on the newest versions this doesn't help anymore. It shows most of the time
> CEST with the wrong time or directly UTC.
> !image-2021-04-13-15-14-06-930.png!
>
> The single NiFi instances or the 2 node clusters are always fine. The issue
> exists only on our 8 node cluster.
> NiFi Single Node Screenshot, which is fine (CEST, so UTC + 2h):
> !image-2021-04-13-15-14-02-162.png!
>
> If we set the -Duser.timezone to "Europe/Zurich" in bootstrap.conf, the UI
> shows no summer time, so only GMT+1 instead of GMT+2. As well not what we
> want.
> {code:java}
> java.arg.20=-Duser.timezone="Europe/Zurich"{code}
> !image-2021-04-13-15-14-56-690.png!
>
> What Matt below suggested has been verified, all servers (single nodes as
> well as clusters) are reporting the same time/timezone.
> [https://community.cloudera.com/t5/Support-Questions/NiFi-clock-is-off-by-one-hour-daylight-savings-problem/td-p/192942]
>
> So the question remains, where on a NiFi cluster comes the time from the UI
> and what could cause it that it is wrong? Sometimes I get UTC, sometimes I'm
> getting CEST but the time is anyhow UTC instead of CEST... I really need to
> have the correct time in the UI as I don't know what the impact could be on
> our dataflows.
>
> Any help would be really appreciated.
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