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Posted to commits@dolphinscheduler.apache.org by GitBox <gi...@apache.org> on 2021/07/01 02:36:16 UTC
[GitHub] [dolphinscheduler] wangmingzhiJohn opened a new issue #5729: [Question] Failed to connect to mysql by jdbc
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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[GitHub] [dolphinscheduler] wangmingzhiJohn commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
wangmingzhiJohn commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871870692
More information, I am concerned about the mysql status, cause below:
```
wangmingzhi@xxx:~/apache-dolphinscheduler-1.3.6-bin2$ systemctl status mysqld
● mysqld.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
wangmingzhi@xxx:~/apache-dolphinscheduler-1.3.6-bin2$ systemctl status mysql
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2021-06-07 10:20:31 CST; 3 weeks 3 days ago
Main PID: 43105 (mysqld)
Tasks: 32
Memory: 156.1M
CPU: 4min 18.896s
CGroup: /system.slice/mysql.service
└─43105 /usr/sbin/mysqld
```
It seems that mysqld is not available, but I can login in mysql and query about the database:
```
wangmingzhi@xxx:~/apache-dolphinscheduler-1.3.6-bin2$ mysql -uds_user -pdolphinscheduler
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 114
Server version: 5.7.33-0ubuntu0.16.04.1 (Ubuntu)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| dolphinscheduler |
+--------------------+
2 rows in set (0.00 sec)
mysql> use dolphinscheduler;
Database changed
mysql>
```
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[GitHub] [dolphinscheduler] tinyking commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
tinyking commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871889716
@wangmingzhiJohn Are you confirmed your mysql config. Is it support 202.168.126.69 or % for the mysql user.
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[GitHub] [dolphinscheduler] CalvinKirs closed issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
CalvinKirs closed issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729
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[GitHub] [dolphinscheduler] tinyking commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
tinyking commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871908192
> I changed the bind-address to 0.0.0.0 and it worked!
@wangmingzhiJohn bind-address is mean only support it.
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[GitHub] [dolphinscheduler] wangmingzhiJohn commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
wangmingzhiJohn commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871888717
@ruanwenjun
```
wangmingzhi@xxx:~/apache-dolphinscheduler-1.3.6-bin2$ telnet 202.168.126.69 3306
Trying 202.168.126.69...
telnet: Unable to connect to remote host: Connection refused
```
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[GitHub] [dolphinscheduler] ruanwenjun commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
ruanwenjun commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871876557
@wangmingzhiJohn Hi, you mean you can deploy on one machine, but now you can't add more machines, right?
It seems caused by `Connection refused `, you can check if you can connect to `mysql` by `telnet` on your new machine or check if the firewall is correct on the machine which you deployed `mysql`.
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[GitHub] [dolphinscheduler] wangmingzhiJohn commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
wangmingzhiJohn commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871887145
@ruanwenjun No. I mean I want to deploy on more machines if I can deploy on one machine successfully by Cluster Deployment Method.
And I just modified the datasource.url in datasource.properties to 127.0.0.1, then it worked.
I am confused about that. The deployed machine's ip is 202.168.126.69. What is different between ip and 127.0.0.1?
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[GitHub] [dolphinscheduler] wangmingzhiJohn commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
wangmingzhiJohn commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871895782
I changed the bind-address to 0.0.0.0 and it worked!
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[GitHub] [dolphinscheduler] github-actions[bot] commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871866291
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[GitHub] [dolphinscheduler] wangmingzhiJohn commented on issue #5729: [Question] Failed to connect to mysql by jdbc
Posted by GitBox <gi...@apache.org>.
wangmingzhiJohn commented on issue #5729:
URL: https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871892000
@tinyking
I supposed that the bind-address is the cause of problem. Should I changed it to 0.0.0.0?
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