[Koha] problem regarding zebra !

[rekhasaraswat]

Dear friends,
   While running my catalog search, i went through the output and error log and found fllowing errors:
1. zebra queue demon is stopped by signal 15.
2. can't connect to local mysal server through socket /var/run/mysqld/mysqld.sock
3. Explain schema is not found, check profile path.

I have checked profilepath in zebra-biblio.cfg and other two configuration files and this have the profile path containg explain.att.
What may be the problem. 
Any help would be appriciated.
Thanks in advance

Regards
Rekha
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