Error Message :
Running jobs from the RA WebService version 3 Agent continuously creates temporary files and can cause out of disk space errors. These temporary files can be written to /var/tmp/, /tmp, c:\TEMP, etc. for every WebService call. This is a result of a known axis2 issue, AXIS2-3919. In order to get around this issue when running WebService version 3 jobs, see the workaround.
The issue no longer exists if running the Automation Engine v12+ and the RA Web Service Agent (REST or SOAP) version 4.0.0+ since the RA Web Service Agent uses a different framework.