question - are errors in the mod_jk logs TRULY errors?

[michael thomas <co...@yahoo.com>]

Hello,

We've been working hard to debug networking issues
that we believe we have.  No matter what we do,
though, we still seem to get at least SOME errors in
mod_jk.log

The system seems to work fine from a user's
perspective, but we still occasionally get these:

[Wed Mar 01 20:00:42 2006] [error]
ajp_connection_tcp_get_message::jk_ajp_common.c (961):
Can't receive the response message from tomcat,
network problems or tomcat is down (10.0.0.9:8009),
err=-113
[Wed Mar 01 20:00:42 2006] [error]
ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down
or refused connection. No response has been sent to
the client (yet)
[Wed Mar 01 20:00:42 2006] [info] 
ajp_service::jk_ajp_common.c (1721): Receiving from
tomcat failed, recoverable operation attempt=0
[Wed Mar 01 20:00:42 2006] [info] 
ajp_service::jk_ajp_common.c (1749): Sending request
to tomcat failed,  recoverable operation attempt=1

We don't get them that often... about once every 30
minutes.  Then again, we don't have much traffic right
now.  Only about 700 visitors a day, with about 15
page views per visitor.

Are these error messages a normal part of mod_jk, or
do they definitely indicate some sort of problem (like
network issues)?

We are using mod_jk 1.2.15, Apache 2.0.55 and Tomcat
5.5.15?

For what it's worth, we have other completely separate
system setups using mod_jk2, and they also all seem to
get occasional ajp errors.  This is our first setup
using mod_jk, and we are assuming these errors are a
bad thing.

Thanks,
-Michael


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