Use the WRKSPLF SELECT (QTMHHTTP) command to view current spool files owned by this user.
Delete spool files that are not important so your next selection will be easier to manage.
Start the HTTP server instance with the -vv option.
STRTCPSVR SERVER (*HTTP) HTTPSVR (JSMAPACHE '-vv')
Look for the completion message CPCA984 in the server job log for confirmation that the trace option you specified has been accepted.
User Trace option changed for job
534123/QTMHHTTP/JSMAPACHE.
This is the manager job for HTTP Server instance JSMAPACHE.
Run the HTTP client program that is causing the error to occur in the HTTP instance.
End the HTTP server instance:
ENDTCPSVR SERVER (*HTTP) HTTPSVR (JSMAPACHE)
Use the WRKSPLF SELECT (QTMHHTTP) again to view the created trace spool files:
QZSRHTTPTR QTMHHTTP PRT01 QSRV534123 HLD 16
QZSRHTTPTR QTMHHTTP PRT01 QSRV534124 HLD 1
QZSRHTTPTR QTMHHTTP PRT01 QSRV534125 HLD 30
QZSRHTTPTR QTMHHTTP PRT01 QSRV534126 HLD 21
Also you can start tracing any time (without stopping and starting the instance) by using the following commands:
TRCTCPAPP APP(*HTTP) HTTPSVR(JSMAPACHE) TRCLVL(*VERBOSE)
TRCTCPAPP APP(*HTTP) SET(*OFF)