JDK 13 EA: 100% CPU use with no Java threads runnable

Stefan Reich stefan.reich.maker.of.eye at googlemail.com
Sat Sep 14 20:57:39 UTC 2019


I was advised by Oracle's Fairoz Matte to contact this list.

I am seeing a Java process use 100% of one CPU core continuously, but no
Java threads are runnable (as evidenced by internal thread sampling as well
as VisualVM).

Whenever it occurs, the problem does not seem to go away until the Java VM

I think I am using a single native library (OSHI), the rest is pure Java.

Older versions of the JDK have exhibited the same problem, but most
interestingly, the bug is happening right now on a Linux machine
(Peppermint 7 I think) with OpenJDK 13 EA Build 31.

I can perform any test on this machine that you instruct me to.

Please advise,

Stefan Reich
BotCompany.de // Java-based operating systems

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