AssertionError in WildcardTypeImpl.getUpperBoundASTs

Wed Oct 18 06:55:05 UTC 2017

Hi Dawid,

So if we want this to be included in 8u162 [1] (to be released on 
January 2018), we better hurry up and submit a backported patch before 
end of October...

I can sponsor the patch. Will you be willing to prepare it or do you 
need some help?

I think it should be a straightforward backport of JDK-8065172 [2].

Regards, Peter

[1] http://openjdk.java.net/projects/jdk8u/releases/8u162.html
[2] https://bugs.openjdk.java.net/browse/JDK-8065172

On 10/17/17 12:41, Dawid Weiss wrote:
> Hi Peter,
>
> Thanks for the pointer. Whether or not this fix should be backported
> to 8u is probably not for me to decide... but if I can provide some
> rationale then I think it'd be better to backport for the following
> reasons:
>
> - This assertion isn't frequent, but it does happen from time to time.
> Robert Muir also let me know in a private conversation that the
> assertion was triggered from time to time in Lucene tests; the test
> that mostly caused it to happen has been since disabled (for unrelated
> reasons).
>
> - I quickly grepped the most recent Solr/Lucene logs and I see that
> the assertion can be buried deep (in the suppressed exceptions chain),
> which may be easily overlooked or raise false other concerns. Look at
> the stack trace [1] below, for example.
>
> - We run tests on multiple different JVMs/ systems and I'm 99%
> confident I've seen errors with this assertion on IBM's J9 too, so it
> affects the whole Java ecosystem, not just OpenJDK?
>
> Dawid
>
> [1] Build: https://jenkins.thetaphi.de/job/Lucene-Solr-master-Linux/20468/
>
> 5 tests failed.
> FAILED:  junit.framework.TestSuite.org.apache.solr.analytics.facet.QueryFacetCloudTest
>
> Error Message:
> Error starting up MiniSolrCloudCluster
>
> java.lang.Exception: Error starting up MiniSolrCloudCluster
>          at __randomizedtesting.SeedInfo.seed([954FE60C5C176808]:0)
>          at org.apache.solr.cloud.MiniSolrCloudCluster.checkForExceptions(MiniSolrCloudCluster.java:507)
>          at org.apache.solr.cloud.MiniSolrCloudCluster.<init>(MiniSolrCloudCluster.java:251)
>          at org.apache.solr.cloud.SolrCloudTestCase$Builder.configure(SolrCloudTestCase.java:190)
>          at org.apache.solr.analytics.facet.AbstractAnalyticsFacetCloudTest.setupCluster(AbstractAnalyticsFacetCloudTest.java:56)
>          at org.apache.solr.analytics.facet.QueryFacetCloudTest.beforeClass(QueryFacetCloudTest.java:44)
>          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>          at java.lang.reflect.Method.invoke(Method.java:498)
>          at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
>          at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:874)
>          at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:890)
>          at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>          at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
>          at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
>          at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>          at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
>          at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
>          at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
>          at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>          at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>          at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>          at org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
>          at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
>          at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
>          at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
>          at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>          at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
>          at java.lang.Thread.run(Thread.java:748)
>          Suppressed: java.lang.AssertionError
>                  at
> sun.reflect.generics.reflectiveObjects.WildcardTypeImpl.getUpperBoundASTs(WildcardTypeImpl.java:86)
>                  at
> sun.reflect.generics.reflectiveObjects.WildcardTypeImpl.getUpperBounds(WildcardTypeImpl.java:122)
>                  at
> sun.reflect.generics.reflectiveObjects.WildcardTypeImpl.toString(WildcardTypeImpl.java:190)
>                  at java.lang.reflect.Type.getTypeName(Type.java:46)
>                  at
> sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.toString(ParameterizedTypeImpl.java:234)
>                  at java.lang.reflect.Type.getTypeName(Type.java:46)
>                  at
> java.lang.reflect.Method.specificToGenericStringHeader(Method.java:421)
>                  at
> java.lang.reflect.Executable.sharedToGenericString(Executable.java:163)
>                  at java.lang.reflect.Method.toGenericString(Method.java:415)
>                  at java.beans.MethodRef.set(MethodRef.java:46)
>                  at
> java.beans.MethodDescriptor.setMethod(MethodDescriptor.java:117)
>                  at java.beans.MethodDescriptor.<init>(MethodDescriptor.java:72)
>                  at java.beans.MethodDescriptor.<init>(MethodDescriptor.java:56)
>                  at
> java.beans.Introspector.getTargetMethodInfo(Introspector.java:1205)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:426)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:173)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:260)
>                  at java.beans.Introspector.<init>(Introspector.java:407)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:173)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:260)
>                  at java.beans.Introspector.<init>(Introspector.java:407)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:173)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:260)
>                  at java.beans.Introspector.<init>(Introspector.java:407)
>                  at java.beans.Introspector.getBeanInfo(Introspector.java:173)
>                  at
> org.apache.solr.util.SolrPluginUtils.findSetter(SolrPluginUtils.java:1027)
>                  at
> org.apache.solr.util.SolrPluginUtils.invokeSetters(SolrPluginUtils.java:1011)
>                  at
> org.apache.solr.util.SolrPluginUtils.invokeSetters(SolrPluginUtils.java:1000)
>
> On Tue, Oct 17, 2017 at 12:13 PM, Peter Levart <peter.levart at gmail.com> wrote:
>> 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