mod_reqtimeout question:

[Brian McBride <brian@xxxxxxxxxxxxxxx>]

Given an apache 2.4 server with:

  ReadRequestTimeout header=60-65,rate=500

When a client opens a persistent connection to that server, does the 
request timeout apply to

  a) each request sent down the connection individually, or
  b) the whole connection, i.e. the connection will close after 65 
seconds of reading requests even if there
      are more requests ready to send

Background:

I have two apache 2.4 servers, one acting as a reverse proxy for the 
other.  Both have mod_reqtimeout enabled.

The reverse proxy is using persistent connections to talk to the backend.

I have applied a steady test load of 1 request per second; requests are 
quick to process in the backend

I'm getting 502 errors from the front end.  It appears that the backend 
is closing the connections, though its hard to be sure which end is.

The rate of 502 errors reduces the longer I make the 
ReadRequestTimeout.  I get no errors if I disable mod_reqtimeout. It 
looks like the backend is closing then connections after about N seconds 
where N is the timeout value, even in the presence of a steady load.

MaxKeepAliveRequests and KeepAliveTimeout are set very high.

I'm pretty new to this sort of thing.  I'd appreciate any thoughts or 
guidance.

Brian






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