Check the below-mentioned logs for UMC issues related to debugging.
UMC Server Details:
/var/opt/novell/log/umc/apps/umc-server/server.log
/var/opt/novell/log/umc/apps/umc-server/error.log
OES-REST related messages:
/var/log/messages
UMC Service Health Details:
/var/opt/novell/log/umc/apps/umc-server/health.log