Local java processes are grayed when trying to connect via JMX

I'm running a number of java processes on a windows XP professional machine. When i attempt to connect to these processes via a local JConsole the processes are grayed out.

However i can run the same proces开发者_C百科ses on another machine and connect via a local JConsole on that machine.

Both machines are running java 1.6 version for the processes and jconsole.

Any ideas why these processes are grayed out?

I'm fighting with this issue right now and I found out a work around:

You can change the local user's temp dir to something that they can definitely access (e.g. D:\temp). Make sure to do this for the process you're trying to monitor and the jconsole process.

Another thing that can apparently cause issues are usernames with uppercase letters in them. The directory will always be created with all lowercase letters, but simply renaming it to exactly how it's being shown in the Task Manager made all the issues go away: http://planeofthought.com/wp/?p=75

if the processes are running as a different user (e.g. if you start them as services), then you won't be able to connect to them. also, if they are running under an older jvm, you most likely won't be able to talk to them either.

in some cases, the local jmx communication mechanism uses the local filesystem and may have issues if permissions are not defined correctly. are you possibly running any of these processes on networked filesystems (nfs, samba)?

Say your windows user name you use to start your java application seen in task manager is YOUR_USER_NAME. Please check a folder whose name looks like hsperfdata_XXXXX (XXXXX should be your user name) in your temp folder and make sure YOUR_USER_NAME and XXXXX are exactly the same (be careful about the upper and lower case).

From http://download.oracle.com/javase/6/docs/technotes/guides/management/jconsole.html:

Applications that are not attachable, with the management agent disabled. These include applications started on a J2SE 1.4.2 platform or started on a J2SE 5.0 platform without the -Dcom.sun.management.jmxremote or com.sun.management.jmxremote.port options. These applications appear grayed-out in the table and JConsole cannot connect to them. In the example connection dialog shown in Figure 3-1, the Anagrams application was started with a J2SE 5.0 platform VM without any of the management properties to enable the JMX agent, and consequently shows up in gray and cannot be selected.

Despite what's being written in the documentation, most likely your process is running under a different user. You can run jconsole as an administrator and try then.

Here is what worked for me. I changed my %TEMP% and %TMP% environment variables to point to a folder I created in my %HOME% location (like C:\Users\[YOUR_NAME]\Temp). Once I did this, all problems vanished.

I had the problem as described earlier, but was advised a simpler solution: just close all programs using Java ("IntelliJ IDEA", "SoapUI", etc. - to unlock the temporary folder) and then delete %TMP%\hsperfdata_<user.name> folder. Then, after opening any Java program, this folder will be recreated but this time with correct name (most likely %TMP%\hsperfdata_<User.Name>). And after that, local Java processes can be monitored through "JConsole" or "VisualVM" (now runs without starting error with a link to VisualVM: Troubleshooting Guide) again.

instead of this steps you can just goto the CMD and then type in jconsole.exe (PID)

Remember to go to the path where jconsole is present and then run the executable file.

Change the name of the hsperfdata folder which for me was found at C:\Users\pmimgg0\AppData\Local\Temp\hsperfdata_pmimgg0 to match the User name found on task manager. Once I changed hsperfdata_pmimgg0 to hsperfdata_PMIMGG0 my local process was no longer greyed out on jconsole.

Change your TEMP paths in Environment Variables to something like D:\temp as it could be a permission issue. Fixed this issue for me

The best way is to run local process like a remote process.

Add these conditions in runtime arguments -

-Dcom.sun.management.jmxremote=true
-Dcom.sun.management.jmxremote.port=6001
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname=localhost
-Dcom.sun.management.jmxremote.rmi.port=6001

Then select Remote Process and point to localhost:6001 as shown

Click Connect and Jconsole is connected successfully.

For me this fixed as I had some admin constraints.