Problem restart the apache with mod_ssl

[Ye Xiao-ting]

When I restart the apache server with command

'apachectl restart' or 'apachectl graceful',

all the https require retrun the message

'The connect to server is not establish!'.

Why? And how can I do with this problem?

I just want to use the command restart or graceful.

 

Thanks advance!!!

 

error_log:

httpd: [Fri Mar 12 09:10:11 1999] [error] mod_ssl: Unable to configure server certificate for connection (OpenSSL library error follows)
httpd: [Fri Mar 12 09:10:11 1999] [error] OpenSSL: error:140C3023:SSL routines:SSL_use_certificate:passed a null parameter

ssl_engine_log:

[12/Mar/1999 09:10:11] [info]  Connection to child 1 established (server test1:443)
[12/Mar/1999 09:10:11] [error] Unable to configure server certificate for connection (OpenSSL library error follows)
[12/Mar/1999 09:10:11] [error] OpenSSL: error:140C3023:SSL routines:SSL_use_certificate:passed a null parameter
[12/Mar/1999 09:10:11] [info]  Connection to child 1 closed (server test1:443)
....