chenruotao commented on PR #4854:
URL: https://github.com/apache/hive/pull/4854#issuecomment-1833779007
> in SQLOperation#cleanup we call driver.close before settting it to NULL
>
> ```
> if (driver != null) {
> driver.close();
> driver.destroy();
> }
> driver = null;
> ```
In my test, set driver = null can not stop the compiling thread, only set
aborted = true can interrupt the thread, the thread still run after set null,
and it is the root cause of memory leak in Hive 3
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