https://userapps.support.sap.com/sap/support/knowledge/en/1902003
1902003 - Many ARFC* jobs in SM37 and many "Error when opening an RFC connection" in SM58/SMQ1 at...
In SM37 there are many ARFC* jobs with unknown origin. This could cause other jobs to get delayed. In SM58 or SMQ1 , there are many entries with connection...