LEONID ILYEVSKY created FLINK-36922:
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Summary: Add warning when creating KryoSerializer for generic type
Key: FLINK-36922
URL: https://issues.apache.org/jira/browse/FLINK-36922
Project: Flink
Issue Type: Improvement
Components: API / Core
Reporter: LEONID ILYEVSKY
In
[https://github.com/apache/flink/blob/fbf532e213882369494ee0f8595814a60de999bd/flink-core/src/main/java/org/apache/flink/api/java/typeutils/GenericTypeInfo.java#L84]
the code throws an exception when the type is treated as generic and generic
types are disabled.
It would be very helpful if this function logged a warning every time, so that
we can see all generic types for which KryoSerializer is used. This way we can
enable generic types and and examine them all by looking in the log.
So it would make sense just to add a warning log statement before line 85.
Currently the only way to see the problematic generic type is to disable them
and look at the exception, but this shows only the first one. We need to see
all.
Another workaround is to use the debugger, with breakpoint on line 85. This is
pretty tedious, and cannot be used in runtime environment.
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