Run below command on OMS to activate debug log and collect emoms.log/trc.Fetch the current setting of logging by running below command%/oms/bin/emctl get property -sysman_pwd -name log4j.logger.oracle.sysmanOracle Enterprise Manager Cloud Control 12c Release 12.1.0.1.0 Copyright (c) 1996, 2012 Oracle Corporation. All rights reserved.Value for property log4j.logger.oracle.sysman for oms :_Management_Service is nullThen set the log level to debug%/oms/bin/emctl set property -sysman_pwd -name log4j.logger.oracle.sysman -value DEBUG -module loggingOracle Enterprise Manager Cloud Control 12c Release 12.1.0.1.0 Copyright (c) 1996, 2012 Oracle Corporation. All rights reserved.Property log4j.logger.oracle.sysman for oms :_Management_Service has been set to value DEBUGOMS restart is not required to reflect the new property valueAfter enabling OMS java debug log, visit required EM pagesTake the OMS logs i.e. EMGC_OMS1.out, emoms.log and emoms.trc etc.