Error "Dispatcher running but no server connected"

[Former Member]

Hi,

My system is ERP 6.0 SR2 ABAP+Java.

In IE, when I click some link in EP (such as User Administration-Identity Management), I sometimes see error "503 Service Unavailable - Dispatcher running but no server connected". Checking SAP Management Console, I find that Dispatcher process turns from green to yellow. Some minutes later, the Dispatcher returns green but EP is still in error.

Someone tell me how to debug this error.

Thanks,

Toan Do

[Former Member]

Hi,

The prob may be caused due to different causes. For a detailed analysis of the prob pl refer SapNote 72248 - NT Dispatcher in status Yellow SAP system running.

Hope this will definitely help to resolve.

Regards

[Former Member]

Thanks Manas,

But the error is OutOfMemoryError.

I have solved the problem by increasing Heap size, New size, Perm size, and shared memory segment.

[Former Member]

Hello Toan,

I am getting the same problem. Can you please letme know if you increased Heap, New, Perm and shared mem segment and where.

Which values shall we take here.

Thank you,

VR

[Former Member]

HI Vera,

Just follow SAP note 723909 to change value of:

-Xmx

-Xms

-XX:PermSize

-XX:MaxPermSize

[former_member182416]

Hi There !

Restart your J2EE Cluster.

Regards,

Rajendra

[JPReyes]

Hi Toan

Check this parameters,

-Xmx

-Xms

-XX:PermSize

-XX:MaxPermSize

Check SAP note 723909 for the recommended JVM settings

Regards

Juan

[Former Member]

Hi Juan,

Your info. is good. Thanks.

But I'm still little confused:

- I cannot find the Java parameter -Xmx as you said.

- What is the meaning of Max Heap Size value in Bootstrap tab in server node & dispatcher node? What's the diff. of Max Heap Size value bet. tab General and tab Bootstrap?

- After changing the values & saving new values, I need to restart the cluster. What is the cluster to be restarted & where to do that? Is it in the Visual Administrator?

Regards,

Toan Do

[JPReyes]

Hi Toan,

Check, std_server0.out, std_dispatcher.out and defaulttrace for errors and post them here... you should be able to find the cause of the problem in there

Regards

Juan

[Former Member]

Hi Jual,

All of them are in usr\sap\DEV\DVEBMGS00\work? (ABAP+Java sys.)

[JPReyes]

Hi Toan,

They must be at

\usr\sap\<sid>\DVEBMGSXX\work

or

\usr\sap\<sid>\JCXX\work

defaulttrace should be at,

\usr\sap\<sid>\DVEBMGSXX\j2ee\cluster\server0\log

Regards

Juan

[Former Member]

Hi Juan,

Yes, that the right folder - because my system is ABAP+Java.

But i find no defaulttrace file.

Here're the erros in file <b>std_server0.out</b>:

<i>...

...

...

FATAL: Caught OutOfMemoryError! Node will exit with exit code 666

================================================================================

java.lang.OutOfMemoryError

Full thread dump Java HotSpot(TM) 64-Bit Server VM (1.4.2_15-b02 mixed mode):

...

...

...

SAP J2EE Engine Version 7.00 PatchLevel is starting...

Error occurred while preloading classes of security providers from jre/lib/ext folder: java.util.zip.ZipException: The filename, directory name, or volume label syntax is incorrect.

...

...

...</i>

For quick fix of this error, do you have any solution?

Thanks,

Toan Do