AssertionError in WildcardTypeImpl.getUpperBoundASTs
dawid.weiss at gmail.com
Fri Oct 13 07:53:01 UTC 2017
We are observing very infrequent assertion errors originating in
getUpperBoundASTs, mostly during concurrent builds on our build
machine, when it's under a heavy load. This has been happening from
time to time with various Java versions; most recently with 1.8.0_131.
I don't see anything in Jira about it, but even a quick Google search
yields some hits .
The stack trace starts with (I include the jackson stack frame which calls it):
The problem cannot be easily reproduced, but I see a comment mentioned
on the core-libs-dev a while ago  by Joel Borggrén-Franck, so
perhaps his question is a valid one and worth investigating:
> Btw, has anyone seen the assert for upper/lower bounds == null fail in the wild?
(note the "[JENKINS] Lucene-olr-master-Linux" hit).
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