linstor-controller 1.28.0 hangs after startup

[Gábor Hernádi]

Hello,

However, after a short amount of time, the linstor controller just stops
> responding again, with basic commands like "linstor node list" timing
> out after 5 minutes.
>

We were fixing a few deadlock-related issues in the recent LINSTOR release,
but also have found another one (will be included in the next release).
However, if you (or any other reader here) face a hanging controller, you
would help us to capture us a thread-dump of the java process and send it
to me (directly is fine, no need to spam the ML with thread-dumps, since
they scale with CPU count and can easily get >100kb).
To get such a thread dump there are 3 options, whereas the first two might
require a JDK installed instead of just a JRE. The third option works also
with a JRE:
1) jstack <pid>
2) jcmd <pid> Thread.print
3) kill -3 <pid>

The third option will NOT kill the process, but it will only print the
thread dump on stdout, so likely into your journalctl.

-- 
Best regards,
Gabor Hernadi
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