You can check if server is running by command
WRKACTJOB SBS(QHTTPSVR) JOB(VSISVR)
Current
Subsystem/Job User Type CPU % Function Status
VSISVR QTMHHTTP BCH .0 PGM-VSPSVR TIMW
VSISVR QTMHHTTP BCI .4 JVM-org.apache SELW
Command VSI001LIB/ENDVSISVR will End Assure UI Server