[jira] [Created] (FLINK-21927) ExpressionReducer compile fail when running long term

[Shang Yuanchun (Jira)]

runsun created FLINK-21927:
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             Summary: ExpressionReducer compile fail when running long term
                 Key: FLINK-21927
                 URL: https://issues.apache.org/jira/browse/FLINK-21927
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.12.2
            Reporter: runsun


Our online service use flink table api as SQL parse and optimize component.   When service  run several months we found a lot of exceptions and most of SQLs run fail.  The exception is below:
    org.codehaus.commons.compiler.CompileException: Line 2, Column 39: '{' expected instead of '-'

ExpressionReducer use function newName() in CodeGenUtils.scala to generate class name, and use a increasing AtomicInteger variable as class name suffix. When run several months, the AtomicInteger is overflow, and the generated class name is invalid like "ExpressionReducer$-2147483648".

If we change the field nameCounter's type to AtomicLong in CodeGenUtils.scala, I think it would work well.




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