1923030 - JCO_COMMUNICATION_FAILURE when executing mapping

Queue is in system_fail status and XI messages are in automatic restart status, but constantly failing with the following error:

>>>>>>>>>>>>>>
Error when opening an RFC connection (CPIC-CALL: 'ThSAPOCMINIT' :cmRc=27 thRc=6 ) COMMUNICATION FAILURE during JCo call.
>>>>>>>>>>>>>>

In SMGW, the status of program AI_RUNTIME_<SID>  is Disconnecting. From the thread dump, you can see the following stack trace:

java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(J)V(Native Method)
- waiting on <0x0000000219c6c158> (a com.sap.aii.mappingtool.tf3.SynchroObject)
at java.lang.Object.wait()V(Object.java:485)
at com.sap.aii.mappingtool.tf3.SynchroObject.switchThread()V(SynchroObject.java:54)
- locked <0x0000000219c6c158> (a com.sap.aii.mappingtool.tf3.SynchroObject)
at com.sap.aii.mappingtool.tf3.RQSBuffer.gainValue()V(RQSBuffer.java:47)
at com.sap.aii.mappingtool.tf3.RQBuffer.getInt(I)Ljava/lang/Object;(RQBuffer.java:58)
at com.sap.aii.mappingtool.tf3.RQPtr.get()Ljava/lang/Object;(RQPtr.java:24)
at com.sap.aii.mappingtool.tf3.RQSBuffer$1.get()Ljava/lang/Object;(RQSBuffer.java:38)
- locked <0x0000000219c6c158> (a com.sap.aii.mappingtool.tf3.SynchroObject)
at com.sap.aii.mappingtool.tf3.ResultQueue.getResult()Ljava/lang/String;(ResultQueue.java:86)

... ...

• SAP NetWeaver Process Integration 7.1
• SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1
• SAP NetWeaver Process Integration 7.2
• SAP NetWeaver 7.3
• SAP enhancement package 1 for SAP NetWeaver 7.3

JCO_COMMUNICATION_FAILURE, mapping thread hanging, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31. , KBA , BC-XI-IBD-MAP , Integration Builder Design - Mapping , Problem