redis_cache.1 error with bench start

i have installed ErpNext

but when i wrote ’ bench start ’ Command i get this error and i don’t know why

ahmedash@AhmedServer:~/frappe-bench$ bench start
12:32:00 system | redis_cache.1 started (pid=16699)
12:32:00 system | worker.1 started (pid=16698)
12:32:00 system | web.1 started (pid=16700)
12:32:00 system | workerbeat.1 started (pid=16701)
12:32:00 redis_cache.1 | [16702] 11 May 12:32:00.511 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
12:32:00 redis_cache.1 | [16702] 11 May 12:32:00.511 # Redis can’t set maximum open files to 10032 because of OS error: Operation not permitted.
12:32:00 redis_cache.1 | [16702] 11 May 12:32:00.511 # Current maximum open files is 1024. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase ‘ulimit -n’.
12:32:00 redis_cache.1 | [16702] 11 May 12:32:00.511 # Creating Server TCP listening socket *:11311: bind: Address already in use
12:32:00 system | redis_cache.1 stopped (rc=1)
12:32:00 system | sending SIGTERM to worker.1 (pid 16698)
12:32:00 system | sending SIGTERM to web.1 (pid 16700)
12:32:00 system | sending SIGTERM to workerbeat.1 (pid 16701)
12:32:00 system | web.1 stopped (rc=-15)
12:32:00 system | workerbeat.1 stopped (rc=-15)
12:32:00 system | worker.1 stopped (rc=-15)

You already have an instance of bench running on the same port…if you are unable to locate the instance then try restarting the system.

you are completely right .

i just restart my system and all things work’s fine now .

thank you :smile: