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[QUESTION] init datasource error

See original GitHub issue

The version of DolphinScheduler is 1.2，the first time I ran sh script/create-dolphinscheduler.sh and got a class not found error, then I found #1407 and downloaded a mysql-connector-java-8.0.18.jar to lib. The second time I ran sh script/create-dolphinscheduler.sh, got the follwoing error:

10:07:19.031 [main] DEBUG org.apache.commons.configuration.PropertiesConfiguration - FileName set to application-dao.properties
10:07:19.034 [main] DEBUG org.apache.commons.configuration.ConfigurationUtils - ConfigurationUtils.locate(): base is null, name is application-dao.properties
10:07:19.034 [main] DEBUG org.apache.commons.configuration.DefaultFileSystem - Could not locate file application-dao.properties at null: no protocol: application-dao.properties
10:07:19.037 [main] DEBUG org.apache.commons.configuration.ConfigurationUtils - Loading configuration from the context classpath (application-dao.properties)
10:07:19.037 [main] DEBUG org.apache.commons.configuration.PropertiesConfiguration - Base path set to file:///home/hadoop/ds-backend/conf/application-dao.properties
10:07:19.091 [main] INFO ru.yandex.clickhouse.ClickHouseDriver - Driver registered
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
10:07:19.315 [main] ERROR com.alibaba.druid.pool.DruidDataSource - init datasource error, url: jdbc:mysql://localhost:3306/dolphinscheduler?useUnicode=true&characterEncoding=UTF-8
com.mysql.cj.jdbc.exceptions.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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
        at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
        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 org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.getCurrentDbType(UpgradeDao.java:80)
        at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.<clinit>(UpgradeDao.java:45)
        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: com.mysql.cj.exceptions.CJCommunicationsException: 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.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
        at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91)
        at com.mysql.cj.NativeSession.connect(NativeSession.java:144)
        at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
        ... 13 common frames omitted
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:607)
        at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
        ... 16 common frames omitted
10:07:19.323 [main] ERROR com.alibaba.druid.pool.DruidDataSource - {dataSource-1} init error
com.mysql.cj.jdbc.exceptions.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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
        at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
        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 org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.getCurrentDbType(UpgradeDao.java:80)
        at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.<clinit>(UpgradeDao.java:45)
        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: com.mysql.cj.exceptions.CJCommunicationsException: 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.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
        at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91)
        at com.mysql.cj.NativeSession.connect(NativeSession.java:144)
        at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
        ... 13 common frames omitted
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:607)
        at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
        ... 16 common frames omitted
10:07:19.324 [main] INFO com.alibaba.druid.pool.DruidDataSource - {dataSource-1} inited
10:07:19.324 [main] ERROR org.apache.dolphinscheduler.dao.upgrade.UpgradeDao - 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.
com.mysql.cj.jdbc.exceptions.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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
        at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
        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 org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.getCurrentDbType(UpgradeDao.java:80)
        at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.<clinit>(UpgradeDao.java:45)
        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: com.mysql.cj.exceptions.CJCommunicationsException: 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.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
        at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91)
        at com.mysql.cj.NativeSession.connect(NativeSession.java:144)
        at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
        ... 13 common frames omitted
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:607)
        at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
        ... 16 common frames omitted
10:07:19.325 [main] ERROR org.apache.dolphinscheduler.dao.upgrade.shell.CreateDolphinScheduler - create DolphinScheduler failed
java.lang.NullPointerException: null
        at org.apache.dolphinscheduler.dao.upgrade.DolphinSchedulerManager.initDolphinScheduler(DolphinSchedulerManager.java:65)
        at org.apache.dolphinscheduler.dao.upgrade.shell.CreateDolphinScheduler.main(CreateDolphinScheduler.java:38)
10:07:19.325 [Druid-ConnectionPool-Create-1353170030] ERROR com.alibaba.druid.pool.DruidDataSource - create connection SQLException, url: jdbc:mysql://localhost:3306/dolphinscheduler?useUnicode=true&characterEncoding=UTF-8, errorCode 0, state 08S01
com.mysql.cj.jdbc.exceptions.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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
        at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
        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$CreateConnectionThread.run(DruidDataSource.java:2570)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: 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.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
        at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91)
        at com.mysql.cj.NativeSession.connect(NativeSession.java:144)
        at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
        ... 6 common frames omitted
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:607)
        at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
        at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
        ... 9 common frames omitted

The conent of application-dao.properties is (which I modified):

# postgre
#spring.datasource.driver-class-name=org.postgresql.Driver
#spring.datasource.url=jdbc:postgresql://192.168.xx.xx:5432/dolphinscheduler
# mysql
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/dolphinscheduler?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
#spring.datasource.password=  # I didn't set a password for mysql

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Comments:7 (3 by maintainers)

github_iconTop GitHub Comments

1reaction
Eights-Licommented, Jan 13, 2020

you can try this mysql version : mysql-connector-java 5.1.34 not use mysql 8

0reactions
Eights-Licommented, Jan 17, 2020

check if use navicat(sql client) connect ds metadata database success. image image check create sql: CREATE DATABASE dscheduler DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci; GRANT ALL PRIVILEGES ON dscheduler.* TO 'dscheduler'@'%' IDENTIFIED BY 'xxxx'; GRANT ALL PRIVILEGES ON dscheduler.* TO 'dscheduler'@'localhost' IDENTIFIED BY 'xxxx'; FLUSH PRIVILEGES; then exec: sh create-dolphinscheduler.sh tips: check root user can access this database

I had another question when I init data source, is that because I start mysql through docker? ERROR com.alibaba.druid.pool.DruidDataSource - {dataSource-1} init error java.sql.SQLException: com.mysql.jdbc.Driver at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:620) at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:874) at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1300) at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1296) at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.getCurrentDbType(UpgradeDao.java:80) at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.<clinit>(UpgradeDao.java:45) 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.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:618) ... 8 common frames omitted 16:35:38.464 [main] ERROR org.apache.dolphinscheduler.dao.upgrade.UpgradeDao - com.mysql.jdbc.Driver java.sql.SQLException: com.mysql.jdbc.Driver at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:620) at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:874) at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1300) at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1296) at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.getCurrentDbType(UpgradeDao.java:80) at org.apache.dolphinscheduler.dao.upgrade.UpgradeDao.<clinit>(UpgradeDao.java:45) at org.apache.dolphinscheduler.dao.upgrade.DolphinSchedulerManager.initUpgradeDao(DolphinSchedulerManager.java:37) at org.apache.dolphinscheduler.dao.upgrade.DolphinSchedulerManager.<init>(DolphinSchedulerManager.java:57) at org.apache.dolphinscheduler.dao.upgrade.shell.CreateDolphinScheduler.main(CreateDolphinScheduler.java:36) Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:618) ... 8 common frames omitted

Problem : Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver Solution: you should put mysql-connector-java 5.1.34 in ds /lib directory

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