Hi Dawid,
The [2] mentions a thread which resulted in a patch by Martin Bucholtz
for JDK 9:
https://bugs.openjdk.java.net/browse/JDK-8065172
...but it seems this has not been backported to 8u (yet). The question
is, will there be any more 8u releases? Would you like this to be
backported to 8u?
Regards, Peter
On 10/13/2017 09:53 AM, Dawid Weiss wrote:
Hi all,
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 [1].
The stack trace starts with (I include the jackson stack frame which calls it):
java.lang.AssertionError: null
at
sun.reflect.generics.reflectiveObjects.WildcardTypeImpl.getUpperBoundASTs(WildcardTypeImpl.java:86)
~[?:1.8.0_131]
at
sun.reflect.generics.reflectiveObjects.WildcardTypeImpl.getUpperBounds(WildcardTypeImpl.java:122)
~[?:1.8.0_131]
at
com.fasterxml.jackson.databind.type.TypeFactory._fromWildcard(TypeFactory.java:1424)
~[jackson-databind-2.8.2.jar:2.8.2]
The problem cannot be easily reproduced, but I see a comment mentioned
on the core-libs-dev a while ago [2] 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?
Dawid
[1]
https://www.google.com/search?q=getUpperBoundASTs+AssertionError&filter=0&biw=1279&bih=863
(note the "[JENKINS] Lucene-olr-master-Linux" hit).
[2] http://markmail.org/message/4phfnh7dj3qdlo6b
