Search Results

Search found 23 results on 1 pages for 'visualvm'.

Page 1/1 | 1 

• VisualVM over ssh

  - by erwin

  I've read Visual VM remotely over ssh but I think I've not fully understood because it was not working for me :-( Please can someone give some example? ssh -D 9696 [email protected] and visualvm.exe -J-Dnetbeans.system_socks_proxy=localhost:9696 -J-Djava.net.useSystemProxies=true starts visualvm, but no processes of external machine are shown (only the local ones like visualvm itself). Moreover sometimes (but not always) I got the message "channel 3: open failed: connect failed: Connection refused" in my ssh window. Any help?

  Read the article

• Why won't the VisualVM Profiler profile my application?

  - by Luke

  I've created a simple 1 file java application that iterates through a loop, calls some functions, allocates some memory, adds some numbers, etc. I run that application via eclipse's Run As->Java Application. The running application shows up in Java VisualVM under Local. I double click on that application and go to the Profiler tab. The default settings are: Start profiling from classes: my.main.package.** Do not profile classes: java.*, javax.*, sun.*, sunw.*, com.sun.* I click on CPU. The CPU and Memory buttons gray out. Nothing happens. The Status says profiling inactive. When my application terminates the Status says application terminated. What am I doing wrong here? Are there some settings I need to tweak? Do I need to set a VM flag when I launch my application?

  Read the article

• Problems to connect Java visualVM to a EC2-instance

  - by kasten

  I'm trying to profile a AWS EC2 instance via visualVM. The instance is in a securitygroup which allows all connections and i'm runing jstatd with a grant codebase "file:${java.home}/../lib/tools.jar" { permission java.security.AllPermission; }; policy on it. When i try to connect from my local machine with visulVM nothing happens. When i use jps i get the following response $ jps -l -m -v rmi://ec2-xxx-xxx-xxx-xxx.compute-1.amazonaws.com Error communicating with remote host: Connection refused to host: xxx.xxx.xxx.xxx; nested exception is: java.net.ConnectException: Connection timed out But i can ssh into the instance and use jps locally. Has anyone a pointer in which direction i can debug further?

  Read the article

• Remote application monitoring through Visual GC

  - by Poole

  I am trying to monitor an application available on remote machine using VisualVM & Visual GC. I have enabled the jmxremote on the remote side as follows: -Dcom.sun.management.jmxremote, -Dcom.sun.management.jmxremote.port=8888, -Dcom.sun.management.jmxremote.ssl=false, -Dcom.sun.management.jmxremote.authenticate=false While monitoring through VisualVM, everything runs fine but VisualGC doesn't displays any stats (getting Not Supported for this JVM error). While tried to monitor one local application, VisualGC runs fine... Got success with the remote app once started jstad on the remote jvm. Is this a known issue with VisualGC...? Remote JVM - 1.5 Local JVM - 1.6

  Read the article

• Remote tunning of jboss using visaulVM

  - by sagarzond

  Hi, I am using visualVM for tunning jboss remotly. I followed following step but unable to get JVM information in visualVM. Start jstatd server on remote machine where jboss running using command jstatd -p 1234 -J-Djava.security.policy=tools.policy In this tools.policy file is added to $JAVA_HOME/bin folder content of tools.policy file is - grant codebase "file:${java.home}/../lib/tools.jar" { permission java.security.AllPermission; }; Start visualVM remote connect on 1234 port using jstat I unable to get information of jboss plz help me........

  Read the article

• Allow JMX connection on JVM 1.6.x

  - by Martin Müller

  While trying to monitor a JVM on a remote system using visualvm the activation of JMX gave me some challenges. Dr Google and my employers documentation quickly revealed some -D opts needed for JMX, but strangely it only worked for a Solaris 10 system (my setup: MacOS laptop monitoring SPARC Solaris based JVMs) On S11 with the same opts I saw that "my" JVM listening on port 3000 (which I chose for JMX), but visualvm was not able to get a connection. Finally I found out that at least my S11 installation needed an explicit setting of the RMI host name. This what finally worked:         -Dcom.sun.management.jmxremote=true \        -Dcom.sun.management.jmxremote.ssl=false \        -Dcom.sun.management.jmxremote.authenticate=false \        -Dcom.sun.management.jmxremote.port=3000 \        -Djava.rmi.server.hostname=s11name.us.oracle.com \ Maybe this post saves someone else the time I spent on research 

  Read the article

• Spring Web application internal visual monitoring heap space and permgen.

  - by Veniamin

  If I have created web application used Spring framework(based on maven), can I include some module/dependency/plugin into my app to monitor Heap space, Permgen, etc. It whould be greate to get some charts output likes as in VisuaVM. For example: http://localhost:8080/monitoring = Including something likes VisualVM I have found next dependency without link to repo: <dependency> <groupId>com.sun.tools.visualvm</groupId> <artifactId>core</artifactId> <version>1.3.3</version> </dependency> How to use it?

  Read the article

• eFX on NetBeans Platform at Silicon Valley JavaFX User Group

  - by Geertjan

  Below you can watch (in addition to seeing Steve Chin and Ben Evans) Sven Reimers presenting eFX, a JavaFX application framework on the NetBeans Platform, yesterday at the Silicon Valley JavaFX User Group. While watching, you'll learn quite a few things about the NetBeans Platform, at the same time. In the end, you see a VisualVM clone written in JavaFX on the NetBeans Platform. Sven will also talk on this topic at NetBeans Day and during his sessions at JavaOne.

  Read the article

• Java: How do you really force a GC using JVMTI's ForceGargabeCollection?

  - by WizardOfOdds

  I'm not looking for the usual "you can only hint the GC in Java using System.gc()" answers, this is not at all what this question is about. My questions is not subjective and is based on a reality: GC can be forced in Java for a fact. A lot of programs that we use daily do it: IntelliJ IDEA, NetBeans, VisualVM. They all can force GC to happen. How is it done? I take it they're all using JVMTI and more specifically the ForceGarbabeCollection (notice the "Force") but how can I try it for myself? http://java.sun.com/javase/6/docs/platform/jvmti/jvmti.html#ForceGarbageCollection Also note that this question is not about "why" I'd want to do this: the "why" may be "curiosity" or "we're writing a program similar to VisualVM", etc. The question is really "how do you force a GC using JVMTI's ForceGarbageCollection"? Does the JVM needs to be launched with any special parameters? Is any JNI required? If so, what code exactly? Does it only work on Sun VMs? Any complete and compilable example would be most welcome.

  Read the article

• Servlet Profiling

  - by MontyBongo

  What is the best way to undertake Servlet profiling? In particular I am looking for a solution that can show the execution times of the method calls within the servlet. I am running the Servlet within a Tomcat environment. I have tried VisualVM but it only allows me to see the method calls from the Tomcat thread rather than the Servlets themselves.

  Read the article

• Profiling short-lived Java applications

  - by ejel

  Is there any Java profiler that allows profiling short-lived applications? The profilers I found so far seem to work with applications that keep running until user termination. However, I want to profile applications that work like command-line utilities, it runs and exits immediately. Tools like visualvm or NetBeans Profiler do not even recognize that the application was ran. I am looking for something similar to Python's cProfile, in that the profiler result is returned when the application exits.

  Read the article

• Is Tomcat 6 ready for continuous integration or how to get it work?

  - by Philipp Sende

  Hello stackoverflow community, I'm looking for a hint how to make tomcat CI ready or an servlet container / application container which stand often redeploys like they happen when using hudson ci. I experienced that Tomcat 6 does not properly undeploy webapps, leaving classes in jvm. For example I monitored tomcat 6 with VisualVM: on start 2000 classes, on deploy of an app 3000 after redeploy 4000 and redeploy 5000 classes and so on - leading to crashes, memory leaks... Okay hope one have a hint on tomcat and continuous-integration or other app servers. Best,

  Read the article

• Java Spotlight Episode 113: John Ceccarelli on Netbeans @JCeccarelli1

  - by Roger Brinkley

  Interview with John Ceccarelli on Netbeans. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News JCP Star Spec Leads 2012 Nominations open now until 31 December Java EE 7 Survey Results JavaFX for Tablets Survey JavaFX Scene Builder - Developer Preview Release Oracle JDK 7u10 released with new security features jtreg update, December 2012 Food For Tests: 7u12 Build b05, 8 b68 Preview Builds + Builds with Lambda & Type Annotation Support Developer Preview of Java SE 8 (with JavaFX) for ARM Project Nashorn: The Vote Is In Events Dec 20, 9:30am JCP Spec Lead Call December on Developing a TCK Jan 15-16, JCP EC Face to Face Meeting, West Coast USA Jan 14-17, IOUG, Redwood Shores Jan 29-31, Distributech,  San Diego Feb 2-3 FOSDEM, Brussels Feb 4-6 Jfokus, Sweden Feature Interview John Jullion-Ceccarelli is the head of engineering for the NetBeans open source project and for the VisualVM Java profiler. John started with Sun Microsystems in 2001 as a technical writer and has since held a variety of positions including technical publications manager, engineering manager, and NetBeans IDE 6.9 Release Boss. He recently relocated to the San Francisco Bay Area after 13 years living in Prague, the Czech Republic. What’s Cool Glassfish is 3 years old Arduino/Raspberry-Pi/JavaFX mash-up by Jose Pereda Early Access of Drombler FX for building modular JavaFX applications with OSGi and Maven Eclipse Modeling Framework Support coming for e(fx)clipse 8003562: Provide a command-line tool to find static dependencies Duke’s Choice Awards Winners LAD - includes JCP EC Member TOTVS London Java Community and SouJava jointly win JCP member of the year

  Read the article

• Tab Sweep: FacesMessage enhancements, Look up thread pool resources, JQuery/JSF integration, Galleria, ...

  - by arungupta

  Recent Tips and News on Java, Java EE 6, GlassFish & more : • Fixing remote GlassFish server errors on NetBeans (Igor Cardoso) • FacesMessage Enhancements (PrimeFaces) • How to create and look up thread pool resource in GlassFish (javahowto) • Jersey 1.12 is released (Jakub Podlesak) • VisualVM problem connecting to monitor Glassfish (Raymond Reid) • JSF 2.0 JQuery-JSF Integration (John Yeary) • JDBC-ODBC Bridge Example (John Yeary) • The Java EE 6 Example - Gracefully dealing with Errors in Galleria - Part 6 (Markus Eisele) • Logout functionality in Java web applications (JavaOnly) • LDAP PASSWORD POLICIES AND JAVAEE (Ricky's Hodgepodge) • Java User Groups Promote Java Education (java.net Editor's Daily Blog) • JavaEE Revisits Design Patterns: Aspects (Interceptor) (Developer Chronicles) • Java EE 6 Hand-on Workshop @ IIUI (Shahzad Badar) • javaee6-crud-example (Arjan Tims) • Sample CRUD application with JSF and RichFaces (Mark van der Tol) • 5 useful methods JSF developers should know (Java Code Geeks) Here are some tweets from this week ... Almost 9000 Parleys views at the #JavaEE6 #Devoxx talk I did with @BertErtman. Not even made available for free yet! #JavaEE6 is hot :-) Sent three proposals for Øredev, about #JavaEE6, #OSGi and a case study about Leren-op-Maat (OSGi in the cloud) together with @m4rr5 [blog] The Java EE 6 #Example - Gracefully dealing with #Errors in #Galleria - Part 6 http://t.co/Drg1EQvf #javaee6 Tomorrow, there is a session about Java EE6 #javaee6 at islamia university #bahawalpur under #pakijug.about 150 students going to attend it.

  Read the article

• How can I install oracle-java7 from webupd8 ppa?

  - by Ahmed Zain El Dein

  I installed ppa:webupd8team/java and I get the following error Output from: sudo apt-get install oracle-java7-installer Reading package lists... Done Building dependency tree Reading state information... Done Suggested packages: binfmt-support visualvm ttf-baekmuk ttf-unfonts ttf-unfonts-core ttf-kochi-gothic ttf-sazanami-gothic ttf-kochi-mincho ttf-sazanami-mincho ttf-arphic-uming The following packages will be upgraded: oracle-java7-installer 1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. Need to get 0 B/16.0 kB of archives. After this operation, 64.5 kB of additional disk space will be used. Could not exec dpkg! E: Sub-process /usr/bin/dpkg returned an error code (100) i did afterwords those line of code trying to resolve the issue becuase it is not existed actually in the /usr/bin/dpkg there is no dpkg mkdir /tmp/dpkg cd /tmp/dpkg wget http://archive.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.15.5.6ubuntu4_i386.deb ar x dpkg*.deb data.tar.gz tar xfvz data.tar.gz ./usr/bin/dpkg sudo cp ./usr/bin/dpkg /usr/bin/ sudo apt-get update sudo apt-get install --reinstall dpkg then i get this $ sudo apt-get install --reinstall dpkg Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 6 not upgraded. 1 not fully installed or removed. Need to get 0 B/1,814 kB of archives. After this operation, 0 B of additional disk space will be used. dpkg: warning: 'dpkg-deb' not found on PATH. dpkg: 1 expected program(s) not found on PATH. NB: root's PATH should usually contain /usr/local/sbin, /usr/sbin and /sbin. E: Sub-process /usr/bin/dpkg returned an error code (2) How can I fix this?

  Read the article

• Java SE 6 Update 23 is released!

  - by [email protected]

  Java SE 6 Update 23 includes the following key changes: Java VisualVM 1.3.1 introduces the following features and enhancements:           o Added Java version and vendor information to the application Overview view           o Built on NetBeans Platform and profiler 6.9.1 Swing JMenuItem Corrections for right-to-left languages           o Non-default alignment and text orientation for the menu items in Swing have been fixed           o The position of the icon and the text where text used to overlap the icon in a menu item was corrected           o All platform Look and Feel configurations will now handle menu items in right-to-left language situations. Updated HotSpot 19 JVM Engine with improvements to overall performance and reliability. Additional Languages support in SuSE Linux Enterprise Server 10 and 11 on Chinese(Simplified), Chinese (Traditional), Japanese, and Korean locales. Supported system configuration, check - http://java.sun.com/javase/6/webnotes/install/system-configurations.htmlSee Release Notes for additional details.

  Read the article

• Core dump equivalence for Java

  - by m3rLinEz

  So far I have learned about generating thread dump and heap dump using jstack and and jmap respectively. However, jstack thread dump contains only texts describing the stack on each thread. And opening heap dump (.hprof file) with Java VisualVM only shows the objects allocated in the heap. What I actually want is to be able see the stack, to switch to particular stack frame, and watch local variables. This kind of post-mortem debugging can be done normally with tools like WinDbg, gdb and a core file (for a native C++ program.) I wonder if such 'core' file (which will allow me to debug in non-live environment) exists in Java?

  Read the article

• Getting Out Of Memory: Java heap space, but while viewing heap space it max uses 50 MB

  - by ikky

  Hi! I'm using ASANT to run a xml file which points to a NARS.jar file. (i do not have the project file of the NARS.jar) I'm getting "java.lang.OutOfMemoryError: Java heap space. I used VisualVM to look at the heap while running the NARS.jar, and it says that it max uses 50 MB of the heapspace. I've set the initial and max size of heapspace to 512 MB. Does anyone have an ide of what could be wrong? I got 1 GB physical Memory and created a 5 GB pagefile (for test purpose). Thanks in advance.

  Read the article

• Java Swing app hangs when run in normal mode but runs fine in debug mode

  - by snocorp

  I am writing a basic Java application with a Swing front-end. Basically it loads some data from a Derby database via Apache Cayenne and then displays it in a JTable. I'm doing my development in Eclipse and I don't think it's important but I'm using Maven for dependencies. Now this works fine when I run using Debug but it seems to hang the display thread when I use the Run button. I've done a thread dump and I'm not 100% certain but everything looks good. I used Java VisualVM and the threads look fine there as well. Strangely it seems to work intermittently. It's pretty consistent though and easy to reproduce. If anyone has any ideas, I'm all out of them.

  Read the article

• What is the easiest straightforward way of telling which version performs better?

  - by Peter Perhác

  I have an application, which I have re-factored so that I believe it is now faster. One can't possibly feel the difference, but in theory, the application should run faster. Normally I would not care, but as this is part of my project for my master's degree, I would like to support my claim that the re-factoring did not only lead to improved design and 'higher quality', but also an increase in performance of the application (a small toy-thing - a train set simulation). I have toyed with the latest VisualVM thing today for about four hours but I couldn't get anything helpful out of it. There isn't (or I haven't found it) a way to simply compare the profiling results taken from the two versions (pre- and post- refactoring). What would be the easiest, the most straightforward way of simply telling the slower from the faster version of the application. The difference of the two must have had an impact on the performance. Thank you.

  Read the article

• debugging JBoss 100% CPU usage

  - by Nate

  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!

  Read the article

• JDK bug migration: components and subcomponents

  - by darcy

  One subtask of the JDK migration from the legacy bug tracking system to JIRA was reclassifying bugs from a three-level taxonomy in the legacy system, (product, category, subcategory), to a fundamentally two-level scheme in our customized JIRA instance, (component, subcomponent). In the JDK JIRA system, there is technically a third project-level classification, but by design a large majority of JDK-related bugs were migrated into a single "JDK" project. In the end, over 450 legacy subcategories were simplified into about 120 subcomponents in JIRA. The 120 subcomponents are distributed among 17 components. A rule of thumb used was that a subcategory had to have at least 50 bugs in it for it to be retained. Below is a listing the component / subcomponent classification of the JDK JIRA project along with some notes and guidance on which OpenJDK email addresses cover different areas. Eventually, a separate incidents project to host new issues filed at bugs.sun.com will use a slightly simplified version of this scheme. The preponderance of bugs and subcomponents for the JDK are in library-related areas, with components named foo-libs and subcomponents primarily named after packages. While there was an overall condensation of subcomponents in the migration, in some cases long-standing informal divisions in core libraries based on naming conventions in the description were promoted to formal subcomponents. For example, hundreds of bugs in the java.util subcomponent whose descriptions started with "(coll)" were moved into java.util:collections. Likewise, java.lang bugs starting with "(reflect)" and "(proxy)" were moved into java.lang:reflect. client-libs (Predominantly discussed on 2d-dev and awt-dev and swing-dev.) 2d demo java.awt java.awt:i18n java.beans (See beans-dev.) javax.accessibility javax.imageio javax.sound (See sound-dev.) javax.swing core-libs (See core-libs-dev.) java.io java.io:serialization java.lang java.lang.invoke java.lang:class_loading java.lang:reflect java.math java.net java.nio (Discussed on nio-dev.) java.nio.charsets java.rmi java.sql java.sql:bridge java.text java.util java.util.concurrent java.util.jar java.util.logging java.util.regex java.util:collections java.util:i18n javax.annotation.processing javax.lang.model javax.naming (JNDI) javax.script javax.script:javascript javax.sql org.openjdk.jigsaw (See jigsaw-dev.) security-libs (See security-dev.) java.security javax.crypto (JCE: includes SunJCE/MSCAPI/UCRYPTO/ECC) javax.crypto:pkcs11 (JCE: PKCS11 only) javax.net.ssl (JSSE, includes javax.security.cert) javax.security javax.smartcardio javax.xml.crypto org.ietf.jgss org.ietf.jgss:krb5 other-libs corba corba:idl corba:orb corba:rmi-iiop javadb other (When no other subcomponent is more appropriate; use judiciously.) Most of the subcomponents in the xml component are related to jaxp. xml jax-ws jaxb javax.xml.parsers (JAXP) javax.xml.stream (JAXP) javax.xml.transform (JAXP) javax.xml.validation (JAXP) javax.xml.xpath (JAXP) jaxp (JAXP) org.w3c.dom (JAXP) org.xml.sax (JAXP) For OpenJDK, most JVM-related bugs are connected to the HotSpot Java virtual machine. hotspot (See hotspot-dev.) build compiler (See hotspot-compiler-dev.) gc (garbage collection, see hotspot-gc-dev.) jfr (Java Flight Recorder) jni (Java Native Interface) jvmti (JVM Tool Interface) mvm (Multi-Tasking Virtual Machine) runtime (See hotspot-runtime-dev.) svc (Servicability) test core-svc (See serviceability-dev.) debugger java.lang.instrument java.lang.management javax.management tools The full JDK bug database contains entries related to legacy virtual machines that predate HotSpot as well as retired APIs. vm-legacy jit (Sun Exact VM) jit_symantec (Symantec VM, before Exact VM) jvmdi (JVM Debug Interface ) jvmpi (JVM Profiler Interface ) runtime (Exact VM Runtime) Notable command line tools in the $JDK/bin directory have corresponding subcomponents. tools appletviewer apt (See compiler-dev.) hprof jar javac (See compiler-dev.) javadoc(tool) (See compiler-dev.) javah (See compiler-dev.) javap (See compiler-dev.) jconsole launcher updaters (Timezone updaters, etc.) visualvm Some aspects of JDK infrastructure directly affect JDK Hg repositories, but other do not. infrastructure build (See build-dev and build-infra-dev.) licensing (Covers updates to the third party readme, licenses, and similar files.) release_eng (Release engineering) staging (Staging of web pages related to JDK releases.) The specification subcomponent encompasses the formal language and virtual machine specifications. specification language (The Java Language Specification) vm (The Java Virtual Machine Specification) The code for the deploy and install areas is not currently included in OpenJDK. deploy deployment_toolkit plugin webstart install auto_update install servicetags In the JDK, there are a number of cross-cutting concerns whose organization is essentially orthogonal to other areas. Since these areas generally have dedicated teams working on them, it is easier to find bugs of interest if these bugs are grouped first by their cross-cutting component rather than by the affected technology. docs doclet guides hotspot release_notes tools tutorial embedded build hotspot libraries globalization locale-data translation performance hotspot libraries The list of subcomponents will no doubt grow over time, but my inclination is to resist that growth since the addition of each subcomponent makes the system as a whole more complicated and harder to use. When the system gets closer to being externalized, I plan to post more blog entries describing recommended use of various custom fields in the JDK project.

  Read the article

• 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!

  Read the article

1