错误连接数据库 [kettletest1] : Error connecting to database: (using class org.gjt.mm.mysql.Driver)

Posted 2023-04-13

错误连接数据库 [kettletest1] : org.pentaho.di.core.exception.KettleDatabaseException:
Error occured 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 occured 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.
.......
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:540)
at org.pentaho.di.core.database.Database.normalConnect(Database.java:399)
... 54 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)

主机名 : MySQL
端口 : 3306
数据库名:kettletest1
之前是报JAR出错，现在JAR包有了，为mysql-connector-java-5.1.17-bin.jar，Kettle版本为4.5.1，求大神解决。

参考技术A A Database Error Occurred 一个数据库错误发生Unable to connect to your database server using the provided settings.不能用提供的设置连接到你的数据库服务器Filename: core/Loader.php文件名 core/Loader.phpLine Number: 260线路: 260 参考技术B 我的也是这种问题，我找了半天发现是360杀毒软件把Spoon.bat当做木马给隔离了，把它添加到信任软件里面重新启动就好了。不过不知道你的原因是不是一样。 参考技术C jar add to path了没有
mysql 服务启动了没有追问

jar包加入了，服务肯定是启动了的。叨咕一阵之后，最后问题解决了。

追答

能否把你这个问题最终的解决 办法 贴上来，很多朋友 都想知道？
另外，不管在哪里提问题，如果最终问题解决了，最好都能把解决的 办法 贴出来。
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错误脚本（查找数据库连接中的所有错误）

SELECT e.name, e.type, e.sequence, e.line, e.position, e.text, s.text FROM user_errors e
JOIN user_source s
ON e.name = s.name
AND e.type = s.type
AND e.line = s.line
ORDER BY e.name, e.type, e.sequence;