On 10/27/2022 6:27 PM, Peter Rader wrote:
Hi David,
is it a moving server? We had similar issues on a airborn server crossing
nation-borders rapidly.
10 minutes is unusual. The lowest timezone-change is 15 minutes afaik.
Kind regards
Hi all,
I've experienced an issue since the morning of the 21st that I'm
hoping to get some direction on for where to look.
An app uses the date/time to set a timeout for a password reset.
This had been working fine for years and suddenly it failed. A restart of
tomcat allowed it to work for a day, then 12 hours, then 5 hours, then 1 hr
and now is averaging a 10 minute or so working duration between tomcat
restarts.
Changing the logging in the app showed that the issue is due to it
sending UTC to the DB while it is broken. Restarting Tomcat results in CDT
being sent for a while until randomly it switches again.
RHEL 7.9, jvm 1.8.0_231-b11, Tomcat 9.0.29
ntp is on, chrony is syncing, Java states correct time when queried
however unsure if it's JDK or JRE when targeted. OS time is good.
When I redeploy the app, log timestamps for the app are in UTC as well
until restarting tomcat. During the issue the log timestamp remains in
CDT as expected, even though values passed are UTC.
I have explicitly defined the timezone in setenv.sh with no change in
behavior.
Any thoughts as what to investigate are greatly appreciated.
Thanks,
David
Have you tried setting the JVM time zone with an environment variable or JVM
argument or with TimeZone.setDefault? I think Mark Thomas mentioned earlier
that Tomcat may invoke TimeZone.setDefault.
What do mean when you say "sending UTC to the DB while it is broken"? Are you populating
a date/time, time or timestamp column? Sending a date or time value for some other purpose? What is
"sending UTC to the DB"?
Also, what do you mean by "broken"? While what is broken?
It isn't clear to me what's happening. Is the O/S time zone getting changed?
Does your app run outside of Tomcat? Is your app communicating directly with
the database? Is this a Java app?
-Terence Bandoian
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