ORA-12537: Network Session:End fo file Error

ORA-12537: Network Session:End fo file Error

  
When i publishing the solution through service center , i got this erorr:
"ORA-12537: Network Session:End fo file".
and my publish process failed.
Why this happining ?
Also some time got this error when i published one espace from service center.
hi Amit,

I would recommend to validate the applicationpool settings and the configuration tool for the timeout settings. 
at last, you might take a look in the database alert log to verify if the database has problems.
Regards,

Hnas
Thanks Hans, will check it..