Hi William, I too receive problem reports from our Mid-tier users and struggled to determine which server they were connected to. I asked one of my JSP experts to write us a program that could run from the browser that would emit the name and IP of the Tomcat server that was serving the users session. We use LVS as our load balancer, which is IP based so once you are locked onto a server, you stay there.
I put this JSP program in the Tomcat webapps/ROOT directory and ask the user to invoke it as: https://myservicename/s*erver_id.jsp* and have them tell me which server they are locked onto. Here is the code: *server_id.jsp*: <%@ page import="java.util.*,java.io.*" %> <% String cmd = "hostname"; String outstr = ""; try { Runtime rt = Runtime.getRuntime(); Process p = rt.exec(cmd); try { InputStreamReader ise = new InputStreamReader(p.getErrorStream()); BufferedReader bre = new BufferedReader(ise); InputStreamReader iso = new InputStreamReader(p.getInputStream()); BufferedReader bro = new BufferedReader(iso); String line=null; while ( (line = bre.readLine()) != null ) { outstr += line; } while ( (line = bro.readLine()) != null ) { outstr += line; } } catch (IOException ioe) { ioe.printStackTrace(); } int exitVal = p.waitFor(); } catch (Throwable t) { t.printStackTrace(); } %> <br> Hostname: <strong><%=outstr%></strong><br> Your IP: <strong><%=request.getRemoteAddr()%></strong><br> Service IP: <strong><%=request.getLocalAddr()%></strong><br> Hope this is helpful. Larry On Thu, Oct 16, 2014 at 1:02 PM, William Rentfrow < wrentf...@stratacominc.com> wrote: > ** > > I sent this to our premiere support person and manager, but I'd be > interested to see what others have to say about this too. > > > > Original message below: > > > > Hi – > > > > This came up on our call and I wanted to write it out. > > > > BMC has stated that the Windows User Tool (WUT) is going to be > discontinued (in fact, it already was in 7.6x). What I need to know is > what is BMC’s recommendation for diagnosing problems with the AR Servers in > a server group? > > > > Currently our users will report an issue like this: “Remedy is slow/locked > up/whatever”. Routinely we get no more information than this. > > > > Right now our troubleshooting is to first diagnose which server(s) is > having problems. The fast way to do this is to login to every server with > the user tool. We usually know within a few seconds if one of the AR > servers is locked up, because we will not be able to log in to it. Then we > can bounce it and get service restored. > > > > If they are responsive we then move on the Mid-tier servers, etc. > > > > With a large load-balanced environment there is no way to * QUICKLY* do > this without the WUT. I could login with Developer Studio, but that > doesn’t use the same threads on the server as the WUT does. We have seen > instances where users are locked up and admins can log in with Dev studio > (and vice versa). Same goes for migrator and the import tool. > > > > Support suggesting checking the AR Error log, but there are two problems > with that – first, many lock-up scenarios do not results in errors in the > arerror.log file. There are numerous other logs to check on every server > as well (CMDB, Email, AIE, etc). Checking every log file on every server > is time consuming and not 100% guaranteed to show us which server is locked > up. > > > > The second problem with support’s suggestion is the sheer time it would > take to login to each server. We are on Linux, so we need to connect via > SSH using putty. We do that by first connecting to a gateway server. Then > we ssh to the actual AR server (direct access is not allowed). Finally, we > sudo to the user Remedy is running as. That means each time we connect > it’s 3X we login. If we multiply that by the 10 servers in our server > group it would take at least an hour just to triage the problem. > > > > I can do the same thing with the WUT in seconds. > > > > So here is the question: What is the proper way to QUICKLY triage which > server is having problems without using the WUT or Dev > Studio/Migrator/Import? > > > > William Rentfrow > > > _ARSlist: "Where the Answers Are" and have been for 20 years_ _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org "Where the Answers Are, and have been for 20 years"
