I have issue with opmanager which keep recurring . today also I tried to open opmager console i have error message as mention in subject line .,I had restarted server than only its working fine

I have check the ports with netstat command port 9050 is occupied by opmanager it self . after the error message I am also not able to access my task manager so not able to kill the task event in command prompt . I have case open with manage engine support since long time but no proper solution has provided as of now. Please suggest if you any idea or experience with this error in such scenarios