Question Re: RFC Client Exception in Technology Q&A

RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:00:03 GMT

Hi All ,

Have encounter an issue , wherein sender is SOAP and receiver is RFC .

Its like two interfaces using the same RFC receiver channel and both the interfaces failed and says :

Error messages says :

For 1st interface :

Error Delivering the message to the application using connection RFC_http://sap.com/xi/XI/System failed, due to: com.sap.engine.interfaces.messaging.api.exception.MessageExpiredException: Sync application request expired.. Setting message to status failed

For 2nd interface :

Error Delivering the message to the application using connection RFC_http://sap.com/xi/XI/System failed, due to:

com.sap.engine.interfaces.messaging.api.exception.MessagingException: com.sap.aii.adapter.rfc.afcommunication.RfcAFWException: error while processing message to remote system:com.sap.aii.adapter.rfc.core.client.RfcClientException: resource error: could not get a client from JCO.Pool: com.sap.mw.jco.JCO$Exception:(106) JCO_ERROR_RESOURCE: Connection pool RfcClient[CC_XXXXXXX] is exhausted. The current pool size limit(max connections) is 1 connections.. Setting message to status failed.

Can any one suggest , how to resolve this issue ?

Currently the Max connection is 1 , if we increase the value for Max Connection to 2 or 5 in the receiver adapter , will this solves the issue ? Please suggest.

-Shweta

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:03:38 GMT

increase max connection in receiver rfc comm channel to 15 or 20 and see if it works.

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:03:51 GMT

Hi Shweta, Please check if the If the 1st RFC is getting executed successfully in SAP system. If the RFC is not closing properly, increasing the number of threads may not help as it might still max out the connections.

Thanks,
Sathya

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:27:33 GMT

Hi Satya ,

Have checked it , RFC connection is fine. Now , if i increase the RFC maximum connection value to 2 , will this be solved ?

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:31:37 GMT

increase max connections to 15 or 20 - as you may have more rfc scenarios coming up later.

or define a new receiver rfc comm channel with all connection details maintained in it for the second scenario and have max connection as 1 - though this is not a good approach.

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:35:18 GMT

Rajeev ,

Yea will do that , one more thing wanted to check here .

There was an option in NWA --- > under Java Service --- > under RFC adapter as syncMessageDeliveryTimeoutMsec , normally this can be increased to solve this kind of issues. But I can't see this parmeter in PI 7.1 .

Can some one tell me where is this parameter maitained in 7.1 ??

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:37:34 GMT

Hi,

If your two scenarios are not EOIO, you might have more simultaneous connections then scenarios. Simply think of several requests from each interface being processed at the same time - they will still fail if you set max connections to 2. It is much safer to set the paramter to a higher value, so that there was a chance for PI to "roll" the available connections dynamically, according to the current usage. Moreover - setting max connections to 10 doesn't mean PI maintains 10 permanent connections to the receiver. It is just a limit of connections that you globally want to allow.

Hope this helps,

Greg

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 13:42:29 GMT

Greg ,

Can you please specify which parameter you are talking about ?

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 14:26:48 GMT

increasing the above timeout parameter will enable to get response even if it is delayed slightly. But if two or more reqs come simultaneously, then this parameter though resolving first error, will still lead to second error if the max connections are not increased.

Re: RFC Client Exception

baskar_gopalakrishnan2 — Fri, 13 Apr 2012 14:28:31 GMT

RFC receiver channel.

Go to RFC client parameter and see for "maximum connections" and set value to higher value example 15

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 15:39:12 GMT

Hi Shweta Ganti,

The answers from RAJEEV GUPTA, Grzegorz Glowacki and Baskar Gopalakrishnan, about the RFC parameter, are the best solution to aovid that problem. Also you should think because this problem begins. I usually see this problem in synchrounous scenarios with a large XML or in scenarios with a large RFC reponse time. May be you could study if you need to pass all the XML to RFC, to improve the RFC code or wheter the problem is by a large runtime execution in ABAP endpoint code to make an asynchronous scenario.

Regards.

Re: RFC Client Exception

Former Member — Fri, 13 Apr 2012 22:03:39 GMT

Hi Sweta,

as Iñaki Vila reply, RFC might be taking more time to respond. for increasing the wait time, you need to set a parameter in SXMB_ADM.

Category: RUNTIME

Parametrs:HTTP_TIMEOUT

Current value: check the existing one, according to that try to increase the time 100000/200000 accroding to response time of RFC.

Thank You,

Madhav

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 13:49:34 GMT

Hi madhav ,

When i went and see in " RUNTIME " category , I can' find the parameter " HTTP_TIMEOUT"

Is that mean we need to create this parameter ? Pl Advise.

-Shweta

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 13:51:09 GMT

Hi Greg ,

Could you please tell me where should I go and increase the parameter .

Kindly let me know the exact path (I am working in 7.1 version)

Thanks

Shweta

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 13:56:24 GMT

Shweta,

yes, usually it can be 60000(60 sec), if you feel like response takes more time than a mminute, increase it further more according to your requirement.

Thank You,
Madhav

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 14:01:13 GMT

Hi,

Simply set it in the receiver RFC communication channel, in the field I marked with green below:

Hope this helps,

Greg

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 15:12:01 GMT

Solution to max connection: increaase value to 25 like that , RFC adapter can handle max connetcion more than 30 at a time.

Solution to Time Out issue: Fisrt debug why your target system is taking that much time to give response, debug your BAPI and implement best coding syandards to get response withing time,.

Then think about chnaging RFC time out parameter value

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 16:03:35 GMT

Greg ,

Apart from this, people are suggesting to increase the parameter at the admin level for the time out exception via SXMB_ADM. I understand this is the BASIS activity , but just wanted to know what is the exact path to change the settings for the same in SXMB_ADM . Pl advise.

Shweta

Re: RFC Client Exception

Former Member — Tue, 24 Apr 2012 16:10:03 GMT

shweta,

you can set the parameters as mentioned in above reply..

Thank You,

Madhav

Re: RFC Client Exception

Former Member — Wed, 25 Apr 2012 05:48:26 GMT

Hi,

Frankly speaking - it might turn out unnecessary. Most probably the timeouts were caused by the messages being "queued" at the receiver adapter level, because of only a single instance of the outgoing connection. In my opinion, it might be worth testing with only the communication channel paramter changed. Only if you still encounter problems, will you have to do further adjustments.

Regards,

Greg