Patrik,
The controller that has generated the error does not have the MySQL
driver in its classpath.
What is confusing is that Sequoia will automatically scan the
directories in the classpath to find the jars (and you probably have
your MySQL dirver jar file in the drivers/ directory) but JGroups does
not use the Sequoia classloader and it will fail to load a driver class
file if it is not explicitely in the classpath.
You have to explicitly put '/path_to_drivers/mysql-connector-xxx.jar in
the controller classpath to solve that problem.
Hope this helps,
Emmanuel
With Sequoia 2.10.10, RAIDb-1 and MySQL (5.0.32) backends on a
different host, I geht get the following error in the controller:
2009-03-18 22:10:29,943 ERROR continuent.hedera.adapters
PullPushAdapter: Error while reading from channel
java.lang.IllegalArgumentException: java.lang.ClassNotFoundException:
com.mysql.jdbc.CommunicationsException
at org.jgroups.Message.getObject(Message.java:275)
at
org.continuent.hedera.channel.JGroupsReliableGroupChannel.receive(JGroupsReliableGroupChannel.java:216)
at
org.continuent.hedera.adapters.PullPushAdapter.run(PullPushAdapter.java:166)
at java.lang.Thread.run(Thread.java:595)
On the client side, the sequoia driver throws this exception:
SQLException: Message of cause: Request [....]... failed on backend
node03 (Communications link failure
Last packet sent to the server was 4 ms ago.)
The MySQL JDBC Connector (5.1.7) is in the classpath of the
controller. After starting up sequoia, the requests get processed
without problems. A few hours later the error above occurs. The node
with the MySQL backend gets disabled.
What should I change in the setup to prevent these errors?
Best regards,
Patrik
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--
Emmanuel Cecchet
FTO @ Frog Thinker
Open Source Development & Consulting
--
Web: http://www.frogthinker.org
email: [email protected]
Skype: emmanuel_cecchet
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