I want to connect my jconsole to the jboss 6.1 via remote access and I am using the jdk and jre 1.7 version can anyone tell me how to do it from scratch please.
I am struggling with this for few past days.enter link description here
error while connecting
The remote connection cannot be able to established but you can use the below command to manually generate the heap dump file of a particular java process.
Linux command: sudo -u jboss jmap -dump:format=b,file=.bin
: It is the name of the file you want to give the file extension can be either .bin or .hprof .
: It is the process id of the java process to which you want to create a memory heap dump.
Related
I need to be able to "remotely debug" a Java/Jakarta EE servlet running under Wildfly 20 under Ubuntu 20 from Eclipse 2020-06 running on Windows 10 at a different IP.
My research has discovered what appears to be two different approaches: one is what I want and the other is a simpler "subset".
*** First the "simple" approach. This approach is supposed to let me debug from Eclipse an app that is already deployed and running on Wildfly. To do this I uncomment this line in standalone.conf:
JAVA_OPTS="$JAVA_OPTS -agentlib:jdwp=transport=dt_socket,address=8787,server=y,suspend=n"
Then I start Wildfly and ensure the app also starts.
In Eclipse I create in Debug Configuration a new Remote Java Application and ensure I use the same port 8787 as above. Then I just push "Debug".
I get this error:
Failed to connect to remote VM. Connection refused. Connection refused: connect
If I return to the Wildfly system and run the following I see that port 8787 is not being monitored so that sure looks like a problem:
ss -tp | grep 8787
(nothing is found)
*** The other approach appears to be what I want to do which is to have Eclipse deploy changed files to Wildfly and also allow me to debug remotely. That is how I worked with Eclipse Oxygen and Wildfly 10 when both were installed on the same Windows machine.
In this case I set up a new Remote Connection in Eclipse and then a new Server (and attach my Project to the Server) using that Connection. I then start the Server in Debug mode. In the Progress View I can see files being copied to a Path on the Wildfly server so that seems like progress but after 20 seconds I see the same error I got in the "simple" approach above.
Failed to connect to remote VM. Connection refused.
What's interesting is that if, in the Remote Systems View I open the Remote Connection I created, I am able to use the sftp item to see files on the remote Wildfly system. So it seems that I am able to connect to Wildfly.
I need help fixing both of these problems but especially the last one since I need to have Eclipse deploy changes to Wildfly as it did when Wildfly was local.
Thank you in advance.
I'm having some issues getting JProfiler connected to a remote WebSphere 8.5.5 instance that is running on Linux. When I start JProfiler on my Windows 10 machine I select the "Profile an application server, locally or remotely" and select the option to integrate with IBM WebSphere 8.x Application Server.
The part I'm having an issue with is the "Specify the remote address" section of setting up the profile. The setup says I need the profiling agent running on target JVM. I download the tar file from the JProfiler website and extract it on Linux machine and run jpenable as it says I should but I get this message.
"No suitable Java Virtual Machine could be found on your system. The version of the JVM must be at least 1.6 and at most 11. Please define INSTALL4J_JAVA_HOME to point to a suitable JVM."
I have made edits to the arguments file that came with the JProfiler in order to remedy this issue but I just can't seem to get JProfiler to see the IBM Java that WebSphere is using on this machine. I have tried using the INSTALL_JAVA_HOME_OVERRIDE variable in the arguments file by putting the full path to the WebSphere Java install. I have tried using the INSTALL4J_JAVA_PREFIX variable and I have created a INSTALL4J_JAVA_HOME variable in the arguments file and put the full path to the WebSphere Java.
Any help would be appreciated greatly appreciated in getting me around this issue. I have verified that WebSphere is using Java version 1.8.0_171.
but I just can't seem to get JProfiler to see the IBM Java that WebSphere is using on this machine.
That's because IBM JVMs are not supported for attach mode.
The setup says I need the profiling agent running on target JVM.
Generally, this is achieved by adding an -agentpath VM parameter to the profiled VM. The remote address that you are asked for in the wizard will be added as an option to that parameter. The wizard will then modify the server config file and add the complete VM parameter, so you don't have to it manually.
More information is available at
https://www.ej-technologies.com/resources/jprofiler/help/doc/main/profiling.html
I am new to NetBeans & PHP Scripting, so please forgive me..
Issue: Unable to upload the php files via NetBeans IDE into remote server Ubuntu (FTP port: 21).
SSH Port 22 is working fine,even with NetBeans
Error Log:
My Operating Environment
NetBeans 7.4 Patch 3 is installed in Windows 10.
Remote server is a virtual machine (Ubuntu 16.4)
Check List Done
FTP Clients are working fine(WinSCP Manual....which I am trying to avoid)
NetBeans Terminal I can edit the files (noticed the port is different 22)
Remote folder is owned by the FTP User
Played with NetBeans Run Configuration Parameters [Passive Mode, Pure FTP...etc]
Any Help is greatly appreciated and Thanks is advance.
Ravi
Solution Steps:
Edit /etc/vsftpd.conf
uncomment #write_enable=YES --> write_enable=YES
Restart vsftpd (sudo service vsftpd restart)
Closed NetBeans IDE and opened it again
I'm stumped. On my old Mac, Jconsole couldn't connect to local JVMs. I thought I had done something to mess up system configuration. Then I got a new Mac. The first thing I did was download a jdk, install it and check to see if jconsole could connect. It could.
Then I pulled over users and applications from my old mac using my Time Machine backup drive except my system files. Still worked.
But I found that odd things were happening with my development environment. In eclipse, I could start my Jboss server, but eclipse never recognised that the Jboss server had started. So, I could never add or delete war files to it through eclipse.
Also, the jboss instance could not connect to my localhost PostGres database even though the ds file clearly gave localhost as the host to connect to.
I fixed these problems by giving my new Mac the hostname the old Mac had had.
But now I am back to not being able to connect to my local JVMs through jconsole.
This affects not just jconsole, but jprof as well so I'd like to get it fixed.
jconsole can see the JVM processes. It just times out when I try to connect.
I also tried connecting to localhost: by writing a java class that slept for five minutes and running it with the following command line:
java -Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=9010 -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.authenticate=false
but I cannot connect to localhost:9010 or :9010 either.
My guess would be this is some network configuration problem, but any help would be really really appreciated.
Thanks,
George
I had similar issues with timeouts. Looking at the packets being sent, it seems that jconsole was trying to connect via an external interface and being blocked by the firewall.
I added
JAVA_TOOL_OPTIONS=-Djava.rmi.server.hostname=localhost
to my environment to ensure all java processes used localhost instead of an external interface for RMI (which is what jconsole is using for connections)
I tried searching for this problem here and in other forums but could not resolve this issue.
I have downloaded NetBeansBeans 7.0 Java EE pack which also installs Tomcat 7 which it did.
I created sample web application and when trying to deploy I get an error:
Starting of Tomcat failed, the server port 8080 is already in use.
I tried changing the ports but no success. However, when i try to run same Tomcat from Command prompt using "startup.bat" command, it runs successfully.
Operating system is Vista. I tried checking for open ports using "netstat -a" but no open port for 8080. also tried to see if any "java.exe" process is running but it was not.
Thanks in advance for the help.
Sometimes Vista, especially after hibernation, doesn't free a previously used port. Have you tried restarting the pc?