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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