Application get crashed with no trace frequently after one or two days.

See more:

Apache

MySQL

Ruby

Rails

This is the last error after which the application stops working

[Fri Aug 31 02:07:23 2012] [error] [client 145.123.411.19] Premature end 
of script headers: 
[ pid=13552 thr=1 file=ext/apache2/Hooks.cpp:817 time=2012-08-31 
02:07:23.257 ]  The backend application (process 13680) did not send a 
valid HTTP response; instead, it sent nothing at all. It is possible 
that it has crashed; please check whether there are crashing bugs in 
this application. 
[Fri Aug 31 04:20:55 2012] [notice] child pid 27795 exit signal 
Segmentation fault (11) 
[Fri Aug 31 04:20:56 2012] [notice] child pid 22071 exit signal 
Segmentation fault (11) 
[Fri Aug 31 04:21:03 2012] [notice] child pid 13025 exit signal 
Segmentation fault (11) 
[Fri Aug 31 04:21:04 2012] [notice] child pid 24538 exit signal 
Segmentation fault (11) 
[Fri Aug 31 04:21:06 2012] [notice] child pid 17065 exit signal 
Segmentation fault (11)

>> I am using,

Ruby 1.9.2p180 
Rails 3.0.5 
Phusion Passenger version 3.0.13

>> For this i have modified the passenger.conf file as mentioned below,

PassengerUseGlobalQueue on
PassengerPoolIdleTime 0
RailsFrameworkSpawnerIdleTime 0
RailsAppSpawnerIdleTime 0
RailsSpawnMethod smart
PassengerMaxPoolSize 6
PassengerStatThrottleRate 10

But my application is still get crashed frequently after 1 or 2 days.

whats seems to be the problem?

Somebody please help,
Thanks in advance.