PDP-X has multiple location of log files.  

pdp component directories:

$POLICY_HOME/logs/

$POLICY_HOME/servers/pdp/logs/

$POLICY_HOME/servers/pdp/logs/Policy/

paplp component directories:

./servers/pdplp/bin/

./servers/pdplp/bin/logs/common-modules/integrity-monitor/

Detailed log locations:

pdp:

./servers/pdp/logs/localhost.2018-01-17.log
./servers/pdp/logs/host-manager.2018-01-17.log

./servers/pdp/logs/manager.2018-01-17.log
./servers/pdp/logs/catalina.2018-01-17.log

./servers/pdp/logs/Policy/ONAP-PDP-REST/metrics.log
./servers/pdp/logs/Policy/ONAP-PDP-REST/error.log
./servers/pdp/logs/Policy/ONAP-PDP-REST/audit.log
./servers/pdp/logs/Policy/ONAP-PDP-REST/debug.log

pdplp:

./servers/pdplp/bin/IntegrityMonitor.log

./servers/pdplp/bin/logs/common-modules/integrity-monitor/metrics.log
./servers/pdplp/bin/logs/common-modules/integrity-monitor/error.log
./servers/pdplp/bin/logs/common-modules/integrity-monitor/audit.log
./servers/pdplp/bin/logs/common-modules/integrity-monitor/debug.log 

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Log locations should be configurable.   Logging guidelines suggest this default, and as such should be the default.

/var/log/ONAP/<component>[/<subcomponent>]/*.log

Traditionally policy locations have been storing under the $POLICY_HOME/logs (non-privileged account where $POLICY_HOME contains all policy code) should be supported as well, hence the need of this parameter to be configurable to place location under

$POLICY_HOME/logs/<component>[/<subcomponent>]/*.log

component should be policy 

subcomponent should be pdp, or pdplp.