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Failure in session communication between dispatcher and server

Hi Guys

Our customer is complaining that sometimes potal freezes and this resulted in all users being prevented from using the system for that period. Then it comes back again automatically after 10 minutes.

The error that I can see in defaultTrace.0.trc file is :

Failure in session communication between current dispatcher and server with ID 1446550. Cannot send request to the server. Sending notification message for disconnected client failed.

com.sap.engine.frame.cluster.message.DestinationNotAvailableException: Participant 1,446,550 is not available.

ClusterException: Invalid wait on message server connect

Anyone having any idea about this.

Thanks & Regards,

Kanchan M

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3 Answers

  • Best Answer
    Posted on Jul 26, 2011 at 11:18 AM

    This is most likely to be a problem related to the maximun amount of connections reached. check parameter ms/max_clients as far as I know default is 300 so if its set to default increase the value an monitor the system

    regards

    Juan

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    • Former Member Juan Reyes

      Hi Guys,

      Even after increasing parameter problem continued.

      Checked Note 1016241 - J2EE Engine hangs because of unsufficient system threads. It says increasing the MaxThreadCount in Global Dispatcher Config.

      Current setting is:

      MaxThreadCount

      70 custom , default is 200

      Note suggests seeting the value to Deafult, java heap memory is 2 GB in our system, will that be enough for accomodating 200 threads ?

      How can i analyse how much heap memory is used/free currently ?

  • Posted on Sep 27, 2011 at 03:19 PM

    Did you stop and start SAP after making the change in RZ10?

    Cheers,

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  • author's profile photo Former Member
    Former Member
    Posted on Sep 27, 2011 at 03:58 PM

    Yes...

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