I need to profile our web application that's running on JBoss 7.1.1, so I started out by looking on the internet for examples of how this is done. To my surprise all information I found was a couple years old and related to older versions of JBoss. I did try some of these anyhow, but nothing worked, except for VisualVM. Problem with VVM was the performance. The system became completely irresponsive and as such, unusable.
Does anyone have experience with profiling JBoss 7? Which profiler works? Doesn't need to be a free tool. I'm willing to buy a profiler. But I first need to see it working. Any example setups would be welcome.
Related
Planning to Migrate the Websphere from 7.0 to 9 and 8.5 to 9.
Can anyone help me getting the detailed Process
Migration here is "In place". (Migration will be done on the same servers, where the old Installation are in)
if at all any migration tools need to be used, please provide the clear info on them.
any documental references, or any video references for the questioner is appreciated.
OS used : RHEL
CUrrent version: WAS 7x and 8.5
Migrating to : WAS 9.0
It sounds like you're in the very beginning stages of doing this migration. Therefore, I highly recommend you take some time to plan this out, especially to figure out the exact steps you'll be taking and how you'll handle something going wrong. For WebSphere, there is a collection of documents from IBM that discuss planning and executing the upgrade. Look around there for documentation on the tools and step by step guides for different kinds of topologies. The step by step guide for an in place migration of a cell is here.
You should make sure to take good backups before you start the process so you can restore back to before the migration if you need to.
In addition to doing the upgrade, an important part is to also make sure your applications are going to work on the new version if you haven't already. IBM provides this tool to scan applications and identify potential issues that developers will have to fix. There is documentation for the tool at that link as well.
If you are in the planning phase, I'd strongly suggest you to consider migrating to WebSphere Liberty instead of traditional WAS v9. All these migration tools (toolkit for binaries, Eclipse migration toolkit) support both migration scenarios.
Choosing Liberty might be a bit more work at the beginning, but you will gain more deployment flexibility and speed up future development. Liberty is also much better fitted for any cloud/containers environments, as it is much more lightweight, so in the future, if you would like to move to containers, it would be much easier.
Check this tutorial Migrate traditional WebSphere apps to WebSphere Liberty on IBM Cloud Private by using Kubernetes, although it shows the steps to migrate to Liberty on ICP, beginning is the same - analyzing of the application whether they are fit for Liberty and migrating. If you don't have access to IBM Cloud or ICP, you can use stand alone version of the Transformation Advisor that was released recently - IBM Cloud Transformation Advisor.
Having said all that, some apps include old or proprietary traditional WebSphere APIs and in that case it may be easier and cheaper to temporary migrate them to WAS v9, and modernize in the future.
Does anyone have any idea how this can be done?
It's my understanding that WebSphere 8.5 traditional is not compatible or will not run on OSX. I am looking for solutions for developers to develop with a WebSphere 8.5 traditional server locally.
Could we setup some servers on a windows machine so they can be used remotely during development?
I downloaded the Eclipse plugin but it gives me the warning saying OS X is not compatible with WebSphere traditional and to give it a remote server address. I tried to point eclipse to a server on a windows PC but it still wants a runtime installation directory.
I found a single thread on WASDev with a similar question talking about runtime stubs with a dead link.
I tried using a liberty server but I get nothing but null pointer exceptions and JMX errors, I don't think this is a valid alternative in my corporate environment.
For developing against WebSphere traditional on OSX, you could try Docker! We've published developer edition versions of 8.5.5.9 and 9.0.0.0, see:
https://developer.ibm.com/wasdev/blog/2016/06/15/websphere-traditional-ibm-http-server-docker-hub/
https://hub.docker.com/r/ibmcom/websphere-traditional/
The Dockerfiles used to produce these images are here, should you want to try building your own instead:
https://github.com/WASdev/ci.docker.websphere-traditional
However, your question is more specific to getting the tools working.
The last I read (and I'll try to confirm/update the answer when I do find it), is that the stubs are part of the full product install for RAD (selectable via Installation Manager).
You're correct that traditional WAS doesn't run on OSX. Remote servers are an option but traditional WAS is considered by some developers to be heavy and slow to restart, so your developers might appreciate something local and more nimble. Liberty is supposed to run on OSX, and things that run on Liberty -usually- will run on traditional, so getting to the bottom of your Liberty problems might be useful. If you haven't already, posting your question on WASDev might reach someone that has a better answer than this one.
I have been using apache-tomcat-6.0.35 in production environment. Our application is hosted on Amazon EC2 using Small Instance. The problem we are facing is that the apache tomcat is using 100% CPU. We have verified it by running htop and it shows multiple threads of tomcat running.
Out application has been developed in Grails 2.0.1.
We are puzzled that why it is happening? Can any body suggest any solutions?
Thanks
Probable Cause
Most likely this has been caused by the recent Leap Second and its impact on quite some unaware/unprepared IT systems, including parts of Linux, MySQL, Java and indeed Tomcat - see the Wired article about the ‘Leap Second’ Bug Wreaks Havoc Across Web for the whole story:
[...], saying it experienced the leap bug problem with the
Java-happy Tomcat web servers it uses to serve up its site. “Our web
servers running tomcat came close to zero response (we were able to
handle some requests),” read an e-mail from a site spokesman. “We were
able to connect to servers in order to reset them. Only rebooting the
servers cleared up the issue.” [emphasis mine]
Workaround / Fix
Accordingly, the solution usually boils down to turning it off and on again, i.e. restarting the server in question, though you might be able to avoid this by simply setting the date, as suggested e.g. in the context of:
Linux/Tomcat, see July 1 2012 Linux problems? High CPU/Load? Probably caused by the Leap Second!:
Apparently, simply forcing a reset of the date is enough to fix the
problem:
date -s "`date`"
MySQL, see MySQL and the Leap Second, High CPU and the Fix (also linked from the comments on wwwhizz' answer to MySQL high CPU usage, where you'll find two specific variations how to do this depending on your OS):
The fix is quite simple – simply set the date. Alternatively, you can
restart the machine, which also works. Restarting MySQL (or Java, or
whatever) does NOT fix the problem.
Background / Proposed Solutions
Please note that while the underlying issue is utterly tricky, it is all but unknown in principle, hence there have been prominent posts/users warning about and explaining this and offering suggestions on how to deal with it in principle, in particular:
An humble attempt to work around the leap second by Marco Marongiu
Time, technology and leaping seconds by Christopher Pascoe
We can't say anything for sure with the information provided. For performance issue, I would recommend a profiler, especially JProfiler, to investigate the cause of this problem. By this way you will be able to locate where the problem is.
This program has a trial license, I think that's enough for a quick look.
UPDATE: after carefully read your question, I see that you have many tomcat instance running for a website? It means that the previous tomcat instances failed to stop; they still run and hog up all the resources. This is possible. You must kill all the old tomcat process before trying to start a new one.
You can kill the processes by hand by "kill -9 " if you are on Linux, before trying to start the server again.
I am currently looking for a book that will teach me the in's and out's of using the Weblogic 10.3 as my application server.
I am currently using Servlet/JSP/EJB/JSF/JPA as the technology but right now, I am deploying it on Glassfish.
My new project involves the use of Weblogic Server and I dont have any idea how this is done.
Some of the books that I read on the net are a little dated and it covers the Weblogic 8 version.
Not sure though, but I would like to know if somebody has any instructions or preference on how to work around the Weblogic.
I basically wanted to create simple app/build/deploy on this server.
Any hints?
Thanks
I'd suggest you to get your hands dirty and try to build/deploy your app by yourself the first time. There is no mystery in doing it for a simple app. Later on, a good starting point is Oracle WebLogic Server 10g Release 3 (10.3) Documentation Site Map (this is a popular version of WebLogic, you should look for the specific version you intend to use). There is plenty of documentation over there that will help you getting started.
I am trying to get the svctraceviewer installed on windows server 2003. I found that it's part of the Windows SDK which is of huge size. Moreover, i wouldn't want install Windows SDK on a server unless it's a hot patch. Is there a way to download or copy the tool separately(probably from windows vista)?
Is there an alternative tool that can be downloaded with reasonable size?
Appreciate your response!
Your right, you probably don't want to push the Windows SDK to all of your servers! :) However, the SvcTraceViewer will run just fine by itself.
We copy it, and some other 'standard' tools to our servers to aid operators/developers in debugging those environments if absolutely necessary.
I don't know of any alternative tools that function as well as it does for specifically reviewing WCF/WF trace logs, but a protocol analyzer (NetMon, Wireshark) will let you see the network traffic. This doesn't help you if your problem is not at the wire level though!
Good Luck!