[jira] [Created] (FLINK-25972) org.apache.calcite.rel.metadata.JaninoRelMetadataProvider#HANDLERS might cause class leaks

[Yun Gao (Jira)]

Yun Gao created FLINK-25972:
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             Summary: 
org.apache.calcite.rel.metadata.JaninoRelMetadataProvider#HANDLERS might cause 
class leaks
                 Key: FLINK-25972
                 URL: https://issues.apache.org/jira/browse/FLINK-25972
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
    Affects Versions: 1.15.0
            Reporter: Yun Gao


JaninoRelMetadataProvider -> static field HANDLERS -> generated class 
GeneratedMetadataHandler_ColumnNullCount loaded by 
org.codehaus.janino.ByteArrayClassLoader. This cache seems to use the strong 
references.



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