RFR(S): JDK-8054194 jstack crash: assert(handle != NULL) failed: JNI handle should not be null

[Dmitry Samersoff]

Hi Everybody,

Please review the fix:

http://cr.openjdk.java.net/~dsamersoff/JDK-8054194/webrev.02/

Time to time, attaching jstack to test being killed by timeout, we get a
secondary crash from JVM running jstack. The crash is intermittent and
hard to reproduce.

This fix doesn't address the root cause (I'm going to file a new CR to
have it investigated) but intended to reduce a noise in nightly tests  -
we will get meaningful exception from jstack rather than VM crash.

-Dmitry

-- 
Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* I would love to change the world, but they won't give me the sources.