15 Jun 2020
03:05 AM
- last edited on
15 Mar 2023
09:09 AM
by
Ana_Kuzmenchuk
Hi all,
we've two apache processes with a connectivity problem since they are started:
The details only shows a Connectivity problem with the message: "TCP connectivity rate for process DMZ Apache on host xcpfhifws008 has decreased to 0 %"
and this screenshot:
so, what could be the connectivity problem in this apache? We don'nt see in Dynatrece any other details...
Thanks in advance!
Josep Maria
Solved! Go to Solution.
There are several reasons for Connectivity issues. I would suggest you start with some possibilities that are explained in:
Hi @Antonio S., the details on the problematic Apache process are this:so it seems to be a "Overloaded or poorly configured processes can have trouble accepting new network connections. This results in timeouts or resets of TCP handshakes. Such issues are tracked as TCP connection refused and TCP connection timeout errors. ". So, how can I view what are the attempts of TCP connections reffused by the appache? Regards!
I would suggest you take a look at:
https://www.dynatrace.com/support/help/how-to-use-dynatrace/networks/detect-network-errors/
Hi,
yes, I've read this article. So, the TCP connections refused seems to be associated to the Apache processes... With this in mind, can it be ruled out that they were due to connection attempts to a port where there is no process listening?
The key I think is to identify these connection attempts, how can we do it?
Regarding the first question, it should be related to ports that Apache is listening to. You can see those ports in the process properties.
Regarding the second question, you'll have to use the tools mentioned in the link. There can be many reasons, and security issues normally appear on top. I would say: