YongGoose commented on PR #7435:
URL: https://github.com/apache/incubator-seata/pull/7435#issuecomment-2969721726
```
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 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
java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
at
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
at
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:341)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2192)
at
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2225)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2024)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:779)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at
java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
at
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
at
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389)
at
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at
com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1703)
at
com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1801)
at
com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2946)
Caused by: java.net.ConnectException: Connection refused
at java.base/sun.nio.ch.Net.pollConnect(Native Method)
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:682)
at
java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:578)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:628)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
at java.base/java.net.Socket.connect(Socket.java:759)
at
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)
... 14 common frames omitted
<==
```
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