HELP! The '/var/adm/message' file increase every few seconds???

Hi, guys, I have a big problem.

I've got a sun solaris 4.1.4 workstation, and the /var/adm/message file will add one row every few seconds. It soon becomes a large file.

I wander if there are some mistakes configuring the workstation.

the /var/adm/message is as follow:

����������������
Sep 16 11:09:43 a580_2_s bootpd[3060]: bootp: BOOTP starting
Sep 16 11:09:43 a580_2_s bootpd[3060]: bootp: (re)reading /etc/bootptab
Sep 16 11:09:44 a580_2_s bootpd[3061]: bootp: BOOTP starting
Sep 16 11:09:44 a580_2_s bootpd[3061]: bootp: (re)reading /etc/bootptab
Sep 16 11:09:45 a580_2_s bootpd[3062]: bootp: BOOTP starting
Sep 16 11:09:45 a580_2_s bootpd[3062]: bootp: (re)reading /etc/bootptab
Sep 16 11:09:54 a580_2_s bootpd[3063]: bootp: BOOTP starting

THANK U VERY MUCH.

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Thank you.