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  • debugging JBoss 100% CPU usage

    - by NateS
    Originally posted on Server Fault, where it was suggested this question might better asked here. We are using JBoss to run two of our WARs. One is our web app, the other is our web service. The web app accesses a database on another machine and makes requests to the web service. The web service makes JMS requests to other machines, aggregates the data, and returns it. At our biggest client, about once a month the JBoss Java process takes 100% of all CPUs. The machine running JBoss has 8 CPUs. Our web app is still accessible during this time, however pages take about 3 minutes to load. Restarting JBoss restores everything to normal. The database machine and all the other machines are fine, only the machine running JBoss is affected. Memory usage is normal. Network utilization is normal. There are no suspect error messages in the JBoss logs. I have set up a test environment as close as possible to the client's production environment and I've done load testing with as much as 2x the number of concurrent users. I have not gotten my test environment to replicate the problem. Where do we go from here? How can we narrow down the problem? Currently the only plan we have is to wait until the problem occurs in production on its own, then do some debugging to determine the cause. So far people have just restarted JBoss when the problem occurred to minimize down time. Next time it happens they will get a developer to take a look. The question is, next time it happens, what can be done to determine the cause? We could setup a separate JBoss instance on the same box and install the web app separately from the web service. This way when the problem next occurs we will know which WAR has the problem (assuming it is our code). This doesn't narrow it down much though. Should I enable JMX remote? This way the next time the problem occurs I can connect with VisualVM and see which threads are taking the CPU and what the hell they are doing. However, is there a significant down side to enabling JMX remote in a production environment? Is there another way to see what threads are eating the CPU and to get a stacktrace to see what they are doing? Any other ideas? Thanks!

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  • Mouse wheel not scrolling in JDialog

    - by Iulian Serbanoiu
    Hello, I'm facing a frustrating issue. I have an application where the scroll wheel doesn't work in a JDialog class. Here's the code: import javax.swing.*; import java.awt.event.*; public class Failtest extends JFrame { public static void main(String[] args) { new Failtest(); } public Failtest() { super(); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setTitle("FRAME"); JScrollPane sp1 = new JScrollPane(getNewList()); add(sp1); setSize(150, 150); setVisible(true); JDialog d = new JDialog(this, false);// NOT WORKING //JDialog d = new JDialog((JFrame)null, false); // NOT WORKING //JDialog d = new JDialog((JDialog)null, false);// WORKING - WHY? d.setTitle("DIALOG"); d.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE); JScrollPane sp = new JScrollPane(getNewList()); d.add(sp); d.setSize(150, 150); d.setVisible(true); } public JList getNewList() { String objs[] = new String[30]; for(int i=0; i<objs.length; i++) { objs[i] = "Item "+i; } JList l = new JList(objs); return l; } } I found a solution which is present as a comment in the java code - the constructor receiving a (JDialog)null parameter. Can someone enlighten me? My opinion is that this is a java bug. Tested on Windows XP-SP3 with 1 JDK and 2 JREs: D:\Program Files\Java\jdk1.6.0_17\bin>javac -version javac 1.6.0_17 D:\Program Files\Java\jdk1.6.0_17\bin>java -version java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing) D:\Program Files\Java\jdk1.6.0_17\bin>cd .. D:\Program Files\Java\jdk1.6.0_17>java -version java version "1.6.0_18" Java(TM) SE Runtime Environment (build 1.6.0_18-b07) Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode, sharing) Thank you in advance, Iulian Serbanoiu PS: The problem is not new - the code is taken from a forum (here) where this problem was also mentioned - but no solutions to it (yet)

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  • Smallest executable for Windows

    - by Andrew Warren
    Hi I need to create a very simple GUI application for Windows(open a file, do some changes based on user input, upload the file to an intranet server). The client company has the latest release versions of Java SE, .NET and Adobe AIR installed on all their machines. And their #1 requirement is to have the smallest possible package for xcopy deployment. So which of the 3 listed platforms should I use? Another option of course is a native exe. Thanks, Andrew

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  • Fanpage/Application integration: how to post to a fan page from an application

    - by Typeoneerror
    I have an existing client who has a fan page for their brand already. I need to create a Facebook Connect enabled website (so I'll be creating an application for it). I want the Facebook Connect application to post to the Fan page's wall as the brand. Is this possible? Is there a way to associate an application with a Fan page if I was an admin of both? Any direction would be much appreciated.

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  • Microsoft equivalent of Eclipse RCP

    - by Bermo
    I have heard positive things about Eclipse RCP (Rich Client Platform) - does Microsoft has similar plugin UI framework available? I found an article from the Eclipse.org marketing director where he states: "An organization that is 100% Microsoft probably won't/shouldn't consider Eclipse RCP." A colleague pointed out that this article was posted in 2005, so i was wondering if Microsoft has a competing product by now, and if not, why not?

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  • Creative Commons Attribution-Share Alike 3.0: Commercial Use?

    - by Jorre
    On the following URL are some icons I'd like to use in a website for a client. This would be commercial work. The site says "free for public use", what is public use and can I use them in commercial works? http://somerandomdude.com/projects/iconic I checked the license at: http://creativecommons.org/licenses/by-sa/3.0/us/ and there it says "free cultural works". Can anyone clear this up?

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  • ASP.NET Debugging Timing out with IIS

    - by Aren B
    Finally broke down and seeking help, my client/iis (not sure which) usually times out after about 30s - 1 minute while im debugging (stepping through code) which not only causes me to lose my spot and have to start over (usually stepping faster, making more mistakes) but the IIS Debug session closes completely and I have to warm up the entire session again. What's the best way to get more time out of a debugging session? Debugging a vanilla 3.5 Web Site (not app) on IIS 7.5 Classic Pipeline

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  • Centering a percent-based div

    - by Sarfraz
    Hello, Recently, a client asked that his site be percent-based rather than pixel-based. The percent was to be set to 80%. As you guys know, it is very easy to center the container if it is pixel-based but how do you center a percent-based main container? #container { width:80%; margin:0px auto; } That does not center the container :(

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  • How to force logout of all users on VSS?

    - by MatthewMartin
    VSS is resuming it's sabotage of my repository again. The repair command won't let me repair, the lock VSS doesn't seem to affect currently logged in users-- and it isn't a user, its claiming the only person logged in is admin (via the VSS admin tool!) and I have already closed all instances of the VSS admin tool and client.

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  • [C#] WebClient construction overhead

    - by Barguast
    I have a client which makes a limited number of concurrent web requests. I use WebClient for this purpose. I currently have a pool of WebClient-s which I create once and use whichever one is idle. This approach is becoming a little cumbersome though, and I'm wondering if there is any benefit to having a collection of pre-constructed WebClient instances, or if creating them on the fly wouldn't be too much trouble?

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  • Temporary table resource limit

    - by Jk
    Hi, i have two applications (server and client), that uses TQuery connected with TClientDataSet through TDCOMConnection, and in some cases clientdataset opens about 300000 records and than application throws exception "Temporary table resource limit". Is there any workaround how to fix this? (except "do not open such huge dataset"?) update: oops i'm sorry there is 300K records, not 3 millions..

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  • Email Code Error

    - by Sneha Joshi
    In Email code, I get following error. The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Is this indicating that we require SSL certificate ?

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  • how to fetch a url with javascript/jquery?

    - by fayer
    i need to fetch a url with javascript/jquery and not php. i've read that you could do that if you got a php proxy, but that means that it is still going through php. cause then it's still the ip of the server that is fetching it. could one fetch the url entirely with only front-end, and thus fetch it with the client's ip?

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  • What this Url ending means .....&123 ?

    - by simple
    Hey I am having some issues while using Nggalley plugin for wordpress the plugin makes use of a JW player and JW player needs an XML - so it requests link like this http://nextgen-gallery.com/index.php?callback=imagerotator&gid=1&149 The lay &xxx really creaps me out couse I am using it for joomla and joomla doesn't like this I am assuming that this has to do with wordpress but still unsure. what does this ending of URL really mean? PS. I would never ever use wordpress plugin in joomla but my client uses and I have to fix it

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  • Sync no privileges.

    - by william-hu
    Hi, I gave my client the app for test. He installed on iTunes,but when sync to his iphone, an error is : Application ** install on **'s iphone need privileges. His system is Windows Vista. What the problem is ? Thank you so much.

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  • Redefine folder structure of document library with metadata

    - by Sachin
    Hi all, I have a problem in my sharepoint document library structure. Currently the document library consiste of folder sub-folder structure to store a document categorywise. Now our client want to redefine this folder structure with a metadata structure. Can any one tell me how can I use metadata instade of folder sub folder structure..? any related articles or links will be appriciated. Thanks Sachin

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  • SFTP in android

    - by Mr. Kakakuwa Bird
    Hi I want to use SFTP in my android project. Can anybody tell me if android [code]already have SFTP library?? Or i have to implement it. If anybody have already done SFTP client in android then please guide me. Thanks in Advance.

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  • Biztalk Flat File Schema - how to accept a LF or CRLF as the line delimiter

    - by FullOfQuestions
    Hi, Our client sends us a flat file as input, which we then take and convert to an XML file before sending to the destination system. The flat file consists of multiple lines, each line is delimited by LF or CRLF. How do I create a Flat File Schema so that Biztalk can interpret each line of data regardless of whether the line was delimited by LF (0x0A) or CRLF (0x0D 0x0A)? Thank you in advance, M

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  • Handling Solr read and write timeout exception

    - by Azhar
    Hello, I am new to solr. I have developed a an website which uses solr for indexing. I want to handle the timeouts that can occur during solr read and write index.Please guide me on how can i handle these exceptions. I am using solrj as solr client and my website and solr server are running on the tomcat. Thnak you!

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  • Is it Asp.Net or Ajax or can both technologies be used together when developing web sites?

    - by AspOnMyNet
    1) A while ago I’ve started learning Asp.Net, but then I’ve heard that Ajax is “the new thing”. Since I don’t want to throw away the time I’ve invested into Asp.Net, I’d like to know if it is a common/recommended practice to use both technologies ( Asp.Net and Ajax) when creating websites and web apps in general? 2) If it indeed is a common practice to use the two technologies together, is that only true for server-side Ajax and Asp.Net or can client-side Ajax also be used in conjunction with Asp.Net? thanx

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  • Open source Mac video streaming server solutions?

    - by John Wright
    In my application, I want to stream videos shot on an iPhone, *.movie files, from a server running on a Mac desktop to an iPhone or iPad client. What are some possible open source servers that do this that are small enough to be shipped or embedded with a downloadable Mac app? There is a product StreamToMe by Matt Gallagher that does this. I noticed a lot of open source alternatives like ffmpeg, VideoLan, and the like but I not sure which one would be good for the Mac.

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  • Sharepoint Filter

    - by Albert
    Hi All, I have two lists, Status Name (string) Active (yes/no) Task Name (string) Status (Lookup to Status list) I have the following statuses (These can be changed at any time by the client): New, Active = Yes Open, Active = Yes Not Resolved, Active = No Resolved, Active = No I want to create a view for the Projects list, that shows all active tasks... How would I go about this? Thanks! Albert

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