HI, we are seeing this error from druid coordinator logs

org.skife.jdbi.v2.exceptions.UnableToObtainConnectionException: java.sql.SQLException: Cannot create PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)
        at org.skife.jdbi.v2.DBI.open(DBI.java:230) ~[jdbi-2.63.1.jar:2.63.1]
        at org.skife.jdbi.v2.DBI.withHandle(DBI.java:279) ~[jdbi-2.63.1.jar:2.63.1]
        at org.apache.druid.metadata.SQLMetadataConnector.lambda$retryWithHandle$0(SQLMetadataConnector.java:142) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:129) ~[druid-core-25.0.0.jar:25.0.0]
        at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:81) ~[druid-core-25.0.0.jar:25.0.0]
        at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:163) ~[druid-core-25.0.0.jar:25.0.0]
        at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:153) ~[druid-core-25.0.0.jar:25.0.0]
        at org.apache.druid.metadata.SQLMetadataConnector.retryWithHandle(SQLMetadataConnector.java:142) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.metadata.SQLMetadataConnector.retryWithHandle(SQLMetadataConnector.java:152) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.metadata.SQLMetadataConnector.createTable(SQLMetadataConnector.java:189) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.metadata.SQLMetadataConnector.createRulesTable(SQLMetadataConnector.java:300) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.metadata.SQLMetadataConnector.createRulesTable(SQLMetadataConnector.java:619) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.metadata.SQLMetadataRuleManagerProvider$1.start(SQLMetadataRuleManagerProvider.java:70) ~[druid-server-25.0.0.jar:25.0.0]
        at org.apache.druid.java.util.common.lifecycle.Lifecycle.start(Lifecycle.java:341) ~[druid-core-25.0.0.jar:25.0.0]
        at org.apache.druid.guice.LifecycleModule$2.start(LifecycleModule.java:152) ~[druid-core-25.0.0.jar:25.0.0]
        at org.apache.druid.cli.GuiceRunnable.initLifecycle(GuiceRunnable.java:136) ~[druid-services-25.0.0.jar:25.0.0]
        at org.apache.druid.cli.GuiceRunnable.initLifecycle(GuiceRunnable.java:94) ~[druid-services-25.0.0.jar:25.0.0]
        at org.apache.druid.cli.ServerRunnable.run(ServerRunnable.java:63) ~[druid-services-25.0.0.jar:25.0.0]
        at org.apache.druid.cli.Main.main(Main.java:112) ~[druid-services-25.0.0.jar:25.0.0]
Caused by: java.sql.SQLException: Cannot create PoolableConnectionFactory (Communications link failure