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https://issues.apache.org/jira/browse/CALCITE-4492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17282591#comment-17282591
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Julian Hyde commented on CALCITE-4492:
--------------------------------------
Shading might be a key factor here.
> ExceptionInInitializerError caused by ImmutableBeans
> ----------------------------------------------------
>
> Key: CALCITE-4492
> URL: https://issues.apache.org/jira/browse/CALCITE-4492
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.26.0
> Reporter: Ruben Q L
> Priority: Major
>
> While testing an application that uses Calcite, the following error is
> observed at start-up on a Websphere9 environment (IBM J9 VM, Java8, Ubuntu):
> {noformat}
> Caused by: java.lang.ExceptionInInitializerError
> at java.lang.J9VMInternals.ensureError(J9VMInternals.java:141)
> at
> java.lang.J9VMInternals.recordInitializationFailure(J9VMInternals.java:130)
> ...
> Caused by: java.lang.RuntimeException: while binding method public default
> java.lang.Object
> com.onwbp.org.apache.calcite.plan.RelRule$Config.as(java.lang.Class)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans.makeDef(ImmutableBeans.java:285)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans.access$000(ImmutableBeans.java:51)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans$1.load(ImmutableBeans.java:64)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans$1.load(ImmutableBeans.java:61)
> at
> com.onwbp.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3529)
> at
> com.onwbp.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2278)
> at
> com.onwbp.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2155)
> at
> com.onwbp.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2045)
> at com.onwbp.com.google.common.cache.LocalCache.get(LocalCache.java:3951)
> at
> com.onwbp.com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3974)
> at
> com.onwbp.com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4958)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans.create_(ImmutableBeans.java:91)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans.create(ImmutableBeans.java:72)
> at
> com.onwbp.org.apache.calcite.plan.RelRule$Config.<clinit>(RelRule.java:121)
> <Break in method call trace.>
> ... 73 more
> Caused by: java.lang.IllegalAccessException:
> 'com.onwbp.org.apache.calcite.plan.RelRule$Config' no access to:
> 'com.onwbp.org.apache.calcite.plan.RelRule$Config.as:(Config,Class)Object/invokeSpecial'
> at
> java.lang.invoke.MethodHandles$Lookup.checkAccess(MethodHandles.java:333)
> at
> java.lang.invoke.MethodHandles$Lookup.unreflectSpecial(MethodHandles.java:970)
> at
> com.onwbp.org.apache.calcite.util.ImmutableBeans.makeDef(ImmutableBeans.java:283)
> ... 86 more
> {noformat}
> It would seem there is an issue around
> {{org.apache.calcite.util.ImmutableBeans}} and the reflection mechanisms that
> it uses, in the context of {{RelRule#Config}} (and specifically the default
> method {{RelRule$Config.as}}).
> Googling a bit, I found the following Flink ticket FLINK-19820, which has a
> very similar exception message. In that case it was seen with Java9 in a
> Debian environment, and the problem is also around {{ImmutableBeans}} in
> {{RelBuilder#Config}}, and again the issue seems generated by a default
> method ({{RelBuilder$Config.toBuilder}}).
> The Flink ticket was closed as "Won't Fix" just because Flink does not
> support Java9 (and apparently the issue did not occur with the
> Flink-supported Java versions), but the underlying Calcite problem was never
> tackled (and Calcite is supposed to work on Java9).
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