I have installed Hive and mysql successfully, i did the configuration for Hive as suggested in link. But i see an error as below:
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
..
..
Caused by: org.datanucleus.exceptions.NucleusException: Attempt to invoke the "BONECP" plugin to create a ConnectionPool gave an error : The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.
so i added the mysql-connector-java.jar in lib of Hive. Now hive just hangs, i dont get the shell at all.
Kindly suggest how i can resolve it
You need to add mysql connector to the classpath in the hive. It is looking for that connector in your classpath and its not able to find it. Download mysql connector and put it to the following path
/usr/lib/hive/apache-hive-0.13.0-bin/lib
Related
I am using shared node cluster
Hadoop 2.5.0-cdh5.3.2
Please share the names all compatible version of MySql jar files to be loaded and all the path folders for any successful import and export between HDFS and MySQL.
I am currently getting below error message
ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.RuntimeException: Could not load db driver class: com.mysql.jdbc.Driver
so far, I have loaded MySql connector and hadoop jar files in /usr/lib/sqoop/lib
mysql-connector-java-5.0.8-bin
hadoop-core-1.0.3
Please let me know if I need to add more files and specify the path
Is t
If it is a version incompatibility issue, then you can give a try to mysql-connector-java-5.1.31.jar as I am using mysql-connector-java-5.1.31.jar with sqoop version 1.4.5. For me, it works for both data import and export use cases.
I am trying to perform an sqoop export on HDP sandbox 2.1 via Oozie. When I run the Oozie job I get the following java runtime exception.
'>>> Invoking Sqoop command line now >>>
7598 [main] WARN org.apache.sqoop.tool.SqoopTool - $SQOOP_CONF_DIR
has not been set in the environment. Cannot check for additional
configuration.
7714 [main] INFO org.apache.sqoop.Sqoop - Running Sqoop version:
1.4.4.2.1.1.0-385
7760 [main] WARN org.apache.sqoop.SqoopOptions - Character argument
'\t' has multiple characters; only the first will be used.
7791 [main] WARN org.apache.sqoop.ConnFactory - $SQOOP_CONF_DIR has
not been set in the environment. Cannot check for additional
configuration.
7904 [main] INFO org.apache.sqoop.manager.MySQLManager - Preparing
to use a MySQL streaming resultset.
7905 [main] INFO org.apache.sqoop.tool.CodeGenTool - Beginning code
generation
7946 [main] ERROR org.apache.sqoop.Sqoop - Got exception running
Sqoop: java.lang.RuntimeException: Could not load db driver class:
com.mysql.jdbc.Driver Intercepting System.exit(1)
I have copied jdbc driver file "mysql-connector-java.jar" to Oozie's shared library folder which I believe is "/usr/lib/oozie/share/lib/sqoop/". I have restarted my sandbox and tried to perform the export with Oozie again and I still get the same error.
The export works perfectly fine when I try performing it only via sqoop, so I presume Oozie needs its own set of drivers.
My question is, which Oozie directory am I suppose to copy my jdbc drivers to?
If you guys think I'm doing something wrong or you need further information, please let me know.
Thank you for your time.
Normally for Oozie the sharelib directory is /user/oozie/share/lib/ on HDFS where "oozie" would be the name of the user which is used to start the Oozie Server. I don't know what that is in case of HDP sandbox 2.1 , but you can use ps command to figure that out.
And for jars needed for sqoop action, I think you should copy the jar to /user/oozie/share/lib/sqoop/ folder.
I would like to use springMVC and JPA (using hibernate) on my tomcat 7 server (running locally on my Mac).
I was able to set up everything successfully with an embedded H2 database.
Now I switched to mysql and am getting the following error
java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver"
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
This suggests tomcat is having trouble finding the mysql-connector for java.
There are a multitude of tutorials on how to add the connector to $CATALINA_HOME/lib.
After trying to use a maven dependency for my project, I followed the advice and copied the .jar file into the lib directory:
$ ls $CATALINA_HOME/lib/mysql*.jar
/Users/david/Applications/tomcat/lib/mysql-connector-java-5.1.20-bin.jar
I have read and execute permissions on the directory and file.
At the moment I can't figure out how to make tomcat aware of the jar. The folder is included in
$CATALINA_HOME/conf/catalina.properties
and I have restarted the server multiple times.
Thanks for you help.
Normally, the output of a CNFE is as follows:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
whereas your error message shows
java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver"
I think you've still got quotes around the driver class name in your config.
I wrote java class to connect mysql database and insert data to database on my centos installed pc.(this java file called by asterisk program using AGI). but I got below exception at runtime.
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
How could I solve this ?
Ok. I solved my question. when I run the asterisk program with AGI server, I added mysql connector classpath as below.
java -classpath asterisk-java-0.3.jar:mysql-connector-java-5.1.18-bin.jar:. org.asteriskjava.fastagi.DefaultAgiServer
you need this jar file: mysql-connector-java-{version}.jar
e.g.
http://findjar.com/jar/mysql/mysql-connector-java/5.1.9/mysql-connector-java-5.1.9.jar.html
I get following error using hibernate:
Exception in thread "main" javax.ejb.EJBException: org.hibernate.exception.JDBCConnectionException: Cannot open connection
...
...
Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/db
The problem is similar to: other question but I think my url is right!
Solution
i found the solution searching here on stackoferflow :)
I needed to place my mysql-connector jar file into jboss/server/default/lib.
Although I dont understand it since i added this jar file as a dependency and it was placed in the lib folder on deployment.