I am in the process of installing 10 ldap server, while installing some times, i get bellow error ,

auth4... server already stopped [FAILED]

*** Error: 1 instance(s) unsuccessfully stopped [FAILED]

Starting dirsrv:

auth4...[13/May/2013:20:13:33 +0200] - SSL alert: Security Initialization: Unable to authenticate (Netscape Portable Runtime error -8192 - An I/O error occurred during security authorization.)

[13/May/2013:20:13:34 +0200] - ERROR: SSL Initialization Failed.

[FAILED]

*** Error: 1 instance(s) failed to start

I followed the same steps on all servers but in 3 servers i am seeing above error

Why some times i see those error ??

When i see those error, I remove all rpm and install again , create certificate .. then its get ok

I am trying to do google. but could not find too much information,any help will be really appreciate ..

Thanks