Log dev_rfc.trc is being populated even though RFC traces are set to 0

Issue/Introduction:

Error Message :
Example of the type of message that is continuously written to file /log/rfc/dev_rfc.trc
#################
**** Trace file opened at 2017-08-02, 18:38:46 GMT
RFC library: 721, Current working directory: /apps/DU/600/HKESAP_HKESAP03/bin/bin_sap, Program: uxagtsap
Hardware: AMD/Intel x86_64 with Linux x86_64, Operating_system: Linux 3.10.0-514.26.2.el7.x86_64, Kernel_release: 721 patchlevel 38
Hostname: vmstlce7hke, IP address: 127.0.1.1, IP address_v6: 127.0.1.1

Changing global trace directory to /apps/DU/600/HKESAP_HKESAP03/log/rfc
#################

The file dev_rfc.trc of the SAP Manager grows quickly with repeated messages even though the RFC trace level has been set to 0.

Cause:

Cause type:
Defect
Root Cause: For each connection, the librfc was writting a message into dev_rfc.trc file.

Environment:

OS: All

Resolution:

Upgrade the Dollar Universe node to 6.8.21 or superior.
We have limited the traces on this file to the strict minimum (one for each start/stop of the manager for SAP).

Fix Status: Released

Fix Version(s):
Component: Manager for SAP
Fixed version: Dollar Universe 6.8.21 - Available

Additional Information:

Workaround :
Remove file dev_rfc.trc manually when the manager is stopped.