dovecot - May 2013 - Error: Initial status notification not received

Hi ,

We are getting a below error on our Dovecot POP/IMAP server on every alternate
days. Please help us in knowing with the errors are related to

May 23 02:40:05 blade7 dovecot: master: Error: service(pop3-login): Initial
status notification not received in 30 seconds, k
illing the process
May 23 02:40:05 blade7 dovecot: master: Error: service(log): child 8697 killed
with signal 9
May 23 02:42:04 blade7 dovecot: master: Error: service(pop3-login): Initial
status notification not received in 30 seconds, k
illing the process
May 23 02:42:04 blade7 dovecot: master: Error: service(ssl-params): Initial
status notification not received in 30 seconds, k
illing the process
May 23 02:42:04 blade7 dovecot: master: Error: service(log): Initial status
notification not received in 30 seconds, killing
the process
May 23 02:42:04 blade7 dovecot: master: Error: service(anvil): Initial status
notification not received in 30 seconds, killin
g the process
May 23 02:42:04 blade7 dovecot: master: Error: service(imap-login): Initial
status notification not received in 30 seconds, k
illing the process

Regards,
Kavish Karkera