InterruptedException at JVM exit due to cleaner

[Daniel Widdis]

While testing some code on AIX (JDK 17 on an OpenJ9 JVM), I got the following printed out on STDOUT as the program exited:

Oct 02, 2022 10:57:00 PM com.sun.jna.internal.Cleaner$1 run

SEVERE: null

java.lang.InterruptedException

        at java.base/java.lang.Object.wait(Native Method)

        at java.base/java.lang.Object.wait(Object.java:219)

        at java.base/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:138)

        at java.base/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:110)

        at com.sun.jna.internal.Cleaner$1.run(Cleaner.java:58)

 

Not a big deal as the program was exiting, but wondering if this is normal behavior for a daemon thread or if there’s anything that can be done to suppress that…

[Daniel Widdis]

Looking into the code, it seems there is identical catch block behavior for an InterruptedException (expected at program exit) and any other exception.  A severe log with null message and stack trace is posted.

 

IMO the interrupt should be silently swallowed in this case.  

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