nginx nginx-1.2.1
OS HP-UX B.11.23 U ia64
built by gcc 4.2.3

When I start the nginx server,it throws some errors.

The error.log contains
2012/06/11 16:46:07 [notice] 6820#0: using the "/dev/poll" event method
2012/06/11 16:46:07 [notice] 6820#0: nginx/1.2.1
2012/06/11 16:46:07 [notice] 6820#0: built by gcc 4.2.3
2012/06/11 16:46:07 [notice] 6820#0: getrlimit(RLIMIT_NOFILE): 10240:10240
2012/06/11 16:46:07 [notice] 6821#0: start worker processes
2012/06/11 16:46:07 [notice] 6821#0: start worker process 6822
2012/06/11 16:46:07 [notice] 6821#0: start worker process 6823
2012/06/11 16:46:07 [alert] 6821#0: sendmsg() failed (9: Bad file number)
2012/06/11 16:46:07 [notice] 6821#0: start worker process 6824
2012/06/11 16:46:07 [alert] 6821#0: sendmsg() failed (9: Bad file number)
2012/06/11 16:46:07 [alert] 6821#0: sendmsg() failed (9: Bad file number)
2012/06/11 16:46:07 [notice] 6821#0: start worker process 6825
2012/06/11 16:46:07 [alert] 6821#0: sendmsg() failed (9: Bad file number)
2012/06/11 16:46:07 [alert] 6821#0: sendmsg() failed (9: Bad file number)
2012/06/11 16:46:07 [alert] 6821#0: sendmsg() failed (9: Bad file number)


Someone help me.
Thank you very much!