Hongshun Wang created FLINK-35524:
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Summary: 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
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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