wangmingzhiJohn opened a new issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729
**Describe the question**
I used the cluster mode to deploy DS.
When I execute `bash script/create-dolphinscheduler.sh` to init the
database, errors came out:
```
wangmingzhi@xxx:~/apache-dolphinscheduler-1.3.6-bin2$ bash
script/create-dolphinscheduler.sh
_ _ |_ _ _|_. ___ _ | _
| | |\/|_)(_| | |_\ |_)||_|_\
/ |
3.2.0
10:20:45.942 [main] INFO ru.yandex.clickhouse.ClickHouseDriver - Driver
registered
10:20:46.106 [main] ERROR com.alibaba.druid.pool.DruidDataSource - init
datasource error, url:
jdbc:mysql://202.168.126.69:3306/dolphinscheduler?characterEncoding=UTF-8&allowMultiQueries=true
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 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342)
at
com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2197)
at
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
at
com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
at
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at
com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1578)
at
com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1644)
at
com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:918)
at
com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1300)
at
com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1296)
at
com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:109)
at
org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.getCurrentDbType(UpgradeDao.java:79)
at
org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.<clinit>(UpgradeDao.java:48)
at
org.apache.dolphinscheduler.dao.upgrade.DolphinSchedulerManager.initUpgradeDao(DolphinSchedulerManager.java:37)
at
org.apache.dolphinscheduler.dao.upgrade.DolphinSchedulerManager.<init>(DolphinSchedulerManager.java:57)
at
org.apache.dolphinscheduler.dao.upgrade.shell.CreateDolphinScheduler.main(CreateDolphinScheduler.java:36)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:301)
... 23 common frames omitted
```
Now I deploy everything on the single machine to test cluster deployment. If
everything is ok, then I will add more machines in.
Mysql's username and password is correct. I don't know why this happened
**Which version of DolphinScheduler:**
-[1.3.6-release]
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