[jira] [Resolved] (FLINK-35524) Clear connections pools when reader exist.

["Ruan Hang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-35524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ruan Hang resolved FLINK-35524.
-------------------------------
    Resolution: Fixed

> Clear connections pools when reader exist.
> ------------------------------------------
>
>                 Key: FLINK-35524
>                 URL: https://issues.apache.org/jira/browse/FLINK-35524
>             Project: Flink
>          Issue Type: Bug
>          Components: Flink CDC
>    Affects Versions: cdc-3.1.1
>            Reporter: Hongshun Wang
>            Assignee: Hongshun Wang
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: cdc-3.2.0
>
>
> Current, inJdbcConnectionPools is static instance, so the datasource pools in it won't be recycle when reader close. It will cause memory leak.
> ```java
> public class JdbcConnectionPools implements ConnectionPools<HikariDataSource, JdbcSourceConfig> {
> private static final Logger LOG = LoggerFactory.getLogger(JdbcConnectionPools.class);
> private static JdbcConnectionPools instance;
> private final Map<ConnectionPoolId, HikariDataSource> pools = new HashMap<>();
> private static final Map<String, JdbcConnectionPoolFactory> POOL_FACTORY_MAP = new HashMap<>();
> ```



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