问题
I am trying to set up a connection in Pentaho 5.3.0.0-213 to mysql on localhost. I am using a Mac running OS 10.10.2. I can connect to the DB using Sequel Pro and have read through all the answers already given on this site (and others!) and have downloaded and copied mysql-connector-java-5.1.34-bin.jar to data-integration/lib and still get the same error.
Any suggestions would be welcome.
The whole error message is as follows: Error connecting to database [localhost_con] : org.pentaho.di.core.exception.KettleDatabaseException: Error occurred while trying to connect to the database
Error connecting to database: (using class org.gjt.mm.mysql.Driver) 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.
org.pentaho.di.core.exception.KettleDatabaseException: Error occurred while trying to connect to the database
Error connecting to database: (using class org.gjt.mm.mysql.Driver) 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.pentaho.di.core.database.Database.normalConnect(Database.java:417)
at org.pentaho.di.core.database.Database.connect(Database.java:357)
at org.pentaho.di.core.database.Database.connect(Database.java:310)
at org.pentaho.di.core.database.Database.connect(Database.java:300)
at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestReport(DatabaseFactory.java:80)
at org.pentaho.di.core.database.DatabaseMeta.testConnection(DatabaseMeta.java:2685)
at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:546)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:313)
at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:157)
at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:141)
at org.pentaho.ui.xul.swt.tags.SwtButton.access$500(SwtButton.java:43)
at org.pentaho.ui.xul.swt.tags.SwtButton$4.widgetSelected(SwtButton.java:138)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.notifyListeners(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
at org.eclipse.jface.window.Window.open(Window.java:796)
at org.pentaho.ui.xul.swt.tags.SwtDialog.show(SwtDialog.java:389)
at org.pentaho.ui.xul.swt.tags.SwtDialog.show(SwtDialog.java:318)
at org.pentaho.di.ui.core.database.dialog.XulDatabaseDialog.open(XulDatabaseDialog.java:116)
at org.pentaho.di.ui.core.database.dialog.DatabaseDialog.open(DatabaseDialog.java:59)
at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.editConnection(SpoonDBDelegate.java:87)
at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3096)
at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3031)
at org.pentaho.di.ui.spoon.Spoon.access$2400(Spoon.java:347)
at org.pentaho.di.ui.spoon.Spoon$27.widgetDefaultSelected(Spoon.java:6121)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.notifyListeners(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1316)
at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7979)
at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9310)
at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:654)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at apple.launcher.LaunchRunner.run(LaunchRunner.java:116)
at apple.launcher.LaunchRunner.callMain(LaunchRunner.java:51)
at apple.launcher.JavaApplicationLauncher.launch(JavaApplicationLauncher.java:52)
Caused by: org.pentaho.di.core.exception.KettleDatabaseException:
Error connecting to database: (using class org.gjt.mm.mysql.Driver)
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.pentaho.di.core.database.Database.connectUsingClass(Database.java:561)
at org.pentaho.di.core.database.Database.normalConnect(Database.java:400)
... 60 more
Caused by: 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:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:338)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2232)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:543)
... 61 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:382)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:241)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:228)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:431)
at java.net.Socket.connect(Socket.java:527)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:213)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:297)
... 76 more
Hostname : localhost Port : 3306 Database name : my_learning_sql
回答1:
I've seen this problem depending on the version of the database and the version of the MySQL driver. I was using mysql-connector-java-5.1.17.jar and had to upgrade to mysql-connector-java-5.1.34-bin.jar in order to get mine to work. Perhaps yours is the opposite problem and you could downgrade your driver to mysql-connector-java-5.1.17.jar to fix yours?
回答2:
I was having a similar issue (same versions you've listed above for drivers, OS, etc.), and ended up tracking it down to this: my ~/.kettle/kettle.properties file didn't list the DB Host setting the same way the database connection in the transform listed it.
deweygarwood$ cat ~/.kettle/kettle.properties
# This file was generated by Pentaho Data Integration version 5.1.2.1.
... stuff here
DW_HOST=localhost <~~~ this line
DW_DBPORT=3306
DW_DBNAME=datawarehouse
DW_DBUSER=root
DW_DBPASSWORD=
didn't match the name listed in my Database Connection inside the kettle transform, which was ${DW_DBHOST}
The way I discovered this was using the "Test" button on the database connection screen and scrolling to the bottom. The output showed the variable "${DW_DBHOST}" rather than "localhost". Updating my ~/.kettle/kettle.properties file to use the same variable name resolved the issue.
Assuming you're using the kettle.properties for your connection settings, I'd expect a similar situation.
回答3:
- download Mysql connector from here: connector
- unzip the file
- copy only the two *.jar files into data-integration/lib/
- restart Pentaho
- go to: Database Connection -> choose MySql -> edit your connection info -> test connection.
These steps resolved my issue.
来源：https://stackoverflow.com/questions/28645898/error-connecting-to-database-using-class-org-gjt-mm-mysql-driver