Request processing time for apache+Passenger+Rails is too long

This is my first time posting a question.Thank you for your cooperation!

• Apache/2.2.15(Unix)
• Phusion Passenger version 4.0.42
• Rails 3.2.18

I would like to ask you a question as the title says, but I am troubled because I do not know the cause.
I set the timeout for apache to 120 seconds, but there are very rare and unexpected defects, and when I looked into the cause, I found out
The apache access log is

[19/Nov/2015:07:35:37+0900] "GET/XXX HTTP/1.1" 200 66369825
[19/Nov/2015:07:30:34+0900] "GET/XXX HTTP/1.1"2007201738623
[19/Nov/2015:09:45:02+0900] "GET/XXX HTTP/1.1" 200 33323601

It looks like this, and the Status has returned 200 even though it is clearly over 120 seconds.
I checked the Rails log and found that the log in the first line of the action called is as follows:

[2015-11-1907:35:38] Hoge#fugacalled
[2015-11-1909:30:34] Hoge#fugacalled
[2015-11-1909:45:03] Hoge#fugacalled

The following processing has been completed as if nothing had happened.
In other words, the communication that came to apache at 07:30 was 09:30, and it suddenly seemed as if nothing had happened
The log appears to have been successfully processed.

Why did this happen?Is there any way to prevent it?
I don't mind if it's small, so please let me know.

Ideally, it would be nice to return an error status such as 500 instead of processing a request that is more than 120 seconds old.

Thank you for your cooperation.