Search before asking

• I had searched in the issues and found no similar issues.

Version

branch-2.1

What's Wrong?

fe memory leak

What You Expected?

do not leak

How to Reproduce?

One Reproduce Steps:
1、create a jdbc catalog:

CREATE CATALOG `test_catalog` PROPERTIES (
"user" = "test_user",
"type" = "jdbc",
"password" = "xxxx",
"metadata_refresh_interval_sec" = "10",
"jdbc_url" = "jdbc:mysql://127.0.0.1:3600/cambyzhu?yearIsDateType=false&tinyInt1isBit=false&transformedBitIsBoolean=true&useUnicode=true&characterEncoding=utf-8",
"driver_url" = "mysql-connector-j-8.0.33.jar",
"driver_class" = "com.mysql.cj.jdbc.Driver",
"checksum" = "801b67e18f23e4e9ec392812a1c108d4"
);

2、then drop user test_user

3、Trigger the memory leak:

for i in {1..10000};do mysql -h127.0.0.1 -uroot -P9030 -e "switch test_catalog;show databases";echo $i;done

We will got error message like:
ERROR 1105 (HY000) at line 1: Failed to initialize JdbcMySQLClient: Catalog test_catalog can not connect to jdbc due to error: Access denied for user 'default_cluster:[email protected]' (using password: YES)

Then we found:
1、jvm_non_heap leak
2、java.net.FactoryURLClassLoader leak in jvm heap

Another Reproduce Steps:
1、create a jdbc catalog with metadata_refresh_interval_sec = 1
2、Trigger the memory leak:

for i in {1..10000};do mysql -h127.0.0.1 -uroot -P9030 -e "show databases from test_catalog;";echo $i;sleep 1;done

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct