Hello everyone, While testing an application that uses Calcite, I'm getting an error when I try to run it on a Websphere9 environment (IBM J9 VM, Java8, Ubuntu) [1]. 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$Config.as).
Googling a bit, I found the following Flink ticket: https://issues.apache.org/jira/browse/FLINK-19820 which has a very similar exception message. In that case it was seen with Java9 in a Debian environment, and the problem is also around ImmutableBeans in RelBuilder#Config, and again the issue seems generated by a default method (RelBuilder$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. Even if Flink does not support Java9, Calcite does, right? Moreover, in my case I get the error with Java8 (only in WebSphere). So I guess we have a potential issue on our side. Has anyone ever seen this problem before? Best regards, Ruben [1] 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
