zy-kkk opened a new pull request, #58574:
URL: https://github.com/apache/doris/pull/58574
## Problem
JNI Global References may not be deleted when `JdbcConnector::close()`
fails
midway due to early returns from `RETURN_IF_ERROR` macros. This prevents
Java
GC from collecting `BaseJdbcExecutor` and its associated `ResultSet`
objects,
causing old generation heap to grow to 99%+.
## Solution
- C++: Always delete all three Global References regardless of Java
close() failure
- Java: Always clear member variable references (`resultSet`, `stmt`,
`conn`) in finally block
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