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Author Topic: ClassNotFoundException: org.jppf.server.protocol.JPPFTaskBundle  (Read 87 times)


  • JPPF Padawan
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Downloaded ( and configured  ...\JPPF62\JPPF-6.2-driver and run the startDriver.bat W2K12.
Driver starts and all nodes are connecting.
Problem: the jppf-driver.log file grows very quickly within 1 minute > 1 GB
following pattern:
2021-07-09 20:01:03,059 [ERROR][org.jppf.server.nio.client.AsyncClientNioServer.handleSelectionException(109)]: error on AsyncClientContext[uuid=null, connectionUuid=null, peer=false, ssl=false, jobEntries=0, sendQueue size=0, interestOps=1] :
java.lang.ClassNotFoundException: org.jppf.server.protocol.JPPFTaskBundle
   at java.lang.ClassLoader.loadClass(
Did anybody face the same error messages and can provide a solution
Any kind of help is highly appreciated
thanks in advance


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Re: ClassNotFoundException: org.jppf.server.protocol.JPPFTaskBundle
« Reply #1 on: July 10, 2021, 08:50:47 AM »


Just so this gets out ogf the way, could you check that jppf-common-6.2.jar is in the classpath of your JPPF driver? This is the jar file where the JPPFTaskBundle class is located.
Also, could you provide an instance of the logged error with the full exception stack trace, so we have a chance to understand what the driver is doing when the error occurs?

Thanks for your time,


  • JPPF Padawan
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Re: ClassNotFoundException: org.jppf.server.protocol.JPPFTaskBundle
« Reply #2 on: August 12, 2021, 02:58:37 PM »

Hi lolo,
First of all, I want to thank you for your reply.
I checked What you suggested and I can confirm that the file jppf-common-6.2.jar is in the classpath.

I enclosed the screenshot of what I capture in the taskbar.

Can you please suggest to me other checks that I can make?

Thank you,

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