2277223 - Maximal number of rfc connections reached in PI ESR

• When attempting to import an IDoc or RFC object in the Process Integration (PI) Enterprise Services Repository (ESR) the error below occurs:
  Maximal number of rfc connections reached
  
  
  
  
• In the defaultTrace, an entry similar to below is visible:
  Error#1#/Applications/ExchangeInfrastructure/Repository#Plain###JCO-Exception during login to R/3 system (group=116, key=RFC_ERROR_RESOURCE)
  Thrown:
  com.sap.mw.jco.JCO$Exception: Maximal number of rfc connections reached
  at com.sap.mw.jco.MiddlewareJRfc.generateJCoException(MiddlewareJRfc.java:211)
  at com.sap.mw.jco.MiddlewareJRfc$Client.connect(MiddlewareJRfc.java:1295)
  at com.sap.mw.jco.JCO$Client.connect(JCO.java:3671)
  at com.sap.aii.upload.sap.SAPConnection.connect(SAPConnection.java:39)
  at com.sap.aii.upload.sap.SAPConnection.<init>(SAPConnection.java:65)
  at com.sap.aii.upload.sap.SAPUploadSource.<init>(SAPUploadSource.java:149)
  at com.sap.aii.ibrep.sbeans.upload.UploadServiceBean.connect(UploadServiceBean.java:45)
  at com.sap.aii.ibrep.sbeans.upload.UploadServiceBean.openSAPSource(UploadServiceBean.java:22)
  at com.sap.aii.ibrep.sbeans.upload.UploadServiceRemoteObjectImpl0_0.openSAPSource(UploadServiceRemoteObjectImpl0_0.java:210)
  at com.sap.aii.ibrep.sbeans.upload.UploadServiceRemoteObjectImpl0_0p4_Skel.dispatch(UploadServiceRemoteObjectImpl0_0p4_Skel.java:184)
  at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:217)
  at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:167)
  at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:157)
  at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:55)
  at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:69)
  at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:21)
  at java.security.AccessController.doPrivileged(Native Method)
  at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:184)
  at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:161)
• A similar error may also be visible in the dev_jrfc trace file

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• SAP NetWeaver 7.0
• SAP enhancement package 1 for SAP NetWeaver 7.0
• SAP enhancement package 2 for SAP NetWeaver 7.0
• SAP enhancement package 3 for SAP NetWeaver 7.0
• SAP NetWeaver Process Integration 7.1
• SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1

SAP NetWeaver 7.0 ; SAP NetWeaver Process Integration 7.1 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, max no of 100 conversations exceeded, SM59, LCRSAPRFC, SAPSLDAPI, Java, RFC Providers , KBA , BC-XI-IBD , Integration Builder - Design , BC-MID-CON-JCO , Java-Connector , Problem