Distinguishing Between Instances of the Java launcher in Task Manager
I'm interested in being able to distinguish between multiple instances of the standard Java launcher, specifically javaw, in the Windows Task Manager. The multiple javaw instances are Java applications that are part of a commercial software product. The installation and launching of the Java applications is already handled and I'm merely interested in being able to tell them apart in the Task Manager.
Are there any obvious problems/issues, including licensing issues, related to creating multiple renamed copies of the standard Java launcher javaw that would then be launched by our software product to allow them to be distinguishable in the Windows Task Manager?
Technically, it works - as for the licensing, you need to resolve that question by reading Sun's license that you agreed to by downloading Java - and maybe consulting Sun. (A link to "Licensing" is below.)
Similar Messages
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Unable o create an instance of the java virtual machine Located at path
I am installing oracle sql developer on Windows XP SP2
I have downloaded sqldeveloper-3.1.07.42 and extracted it.
when i double click sqldeveloper it shows dialog box
Unable o create an instance of the java virtual machine Located at path
..\..\jdk\jre\bin\client\jvm.dll
and OK button
i have tried a solution posted on a site
1- Open the ide.conf file located under <Oracle SQL Developer>jdev\bin\
2- Edit :
AddVMOption -Xmx1024M
AddVMOption -Xmx256M or 512 MB change into 512 instead of 1024
it does not work for me
What is the cause & how to resolve it please help
I would be thankful to you guysHi,
I've got the exact same problem when launching to JDeveloper.
And I've searched on internet for days.
I did try to modify the number of
MaxPermSize in jdev.conf
and
Xmx and Xms in ide.conf
I've tried several combinations, and sometimes it works.
The disappoint fact is that even with the same combination of the settings, sometimes it works and sometimes it doesn't.
Sometimes it just work. Sometimes it doesn't...and after rebooting it works again......Sometimes even rebooting doesn't help.......Sometimes when change MaxPermSize to a smaller number it works...and next time it may not work again....Sometimes you change the MaxPermSize to some other number, save, and then change it back,,,,and it works again...but next time you try to use it, it may not work..........
I don't know what leads to these problems.....anyone could help? Thanks in advance.... -
Unable to create an instance of the Java Virtual Machine
I hope someone can help me to encounter this problem. Well, I have read the instruction over and over on how to setup SQL Developer.
The version i have installed Oracle Database 11g Express Edition and downloaded sqldeveloper-4.0.0.13.80-no-jre and the jdk version 1.7.0_45. Problem is when setup oracle sql developer, pop-up screen highlight on
Unable to create an instance of the Java Virtual Machine
Located at path : C:\Program Files/Java/jdk1.7.0_45\jre\bin\client\jvm.dlll.
I have select the path earlier stage and direct to the C:\Program Files/Java/jdk1.7.0_45 ONLY FOLDER. It turns out to this error.
At the cmd screen error message as below :
Error occurred during initialization of VM
Could Not reserve enough space for object heap
Anyone do give me advise on how to solve this issue. Thank's alot.What I did was:
Use
Windows Explorer to browse to C:\Users\user\AppData\Roaming\sqldeveloper\1.0.0.0.0Open
product.conf with wordpad
Go
to the bottom of the file
Uncomment
the 32 bit entry and change it to:Add32VMOption -Xmx512m -
Caching values in JNI having multiple instances of the Java wrapper object
Hi,
I have a Java lib that wraps and more complex 3 ^rd^ party C++ lib using JNI. This C++ lib is asynchronous. So, there's the need to register callbacks. I've already done this. I can register a callback from Java to the C++ lib and I can get notified, also in Java, when the C++ lib fires an event.
To achieve this I had to cache some information in my "JNI glue code". I've cached a JavaVM* and a jobject to that I can call a Java method in "glue code" callback. Something like this:
// This is supposed to be a callback registered in the 3 ^rd^ party lib's object that I'm wrapping
void callback_OnSomething(int someInfo) {
// Call a the "fireOnSomething" method from Java
So, all of this is working, but I have a small problem. When I have more than one instance of my "Java wrapper object", my cached values in the glue code will get mixed up, because "glue code" cached variables are the same.
Have you ever done something like this? How have you solved it?
Many thanks in advance.Hi,
Thanks for you answer! By "glue code" I mean the C code that's used to "glue" the Java code to the 3 ^rd^ party lib. I've seen this term here: en.wikipedia.org/wiki/Glue_code.
I've already converted my objects to "GlobalReferences". My example is running perfectly when I have just one instance of the Java wrapper object.
So, if I understood it correctly you're suggesting that I cache the values in the Java object itself? So, what I have to do is to just have a "long" in my Java object with the memory addresses. And is the "long" always valid, whether I'm running a 32 bits or 64 bits version?
Just one more thing. When you say "Make sure to delete it when finished with it", what do you mean?
Once again, many thanks! -
JDeveloper: Unable to create an instance of the Java Virtual Machine
Hi,
I've got this
Unable to create an instance of the Java Virtual Machine Located in path: C:\u01\app\Oracle\Middleware\JDev11g\jdk160_21\jre\bin\client\jvm.dll
problem like many people else who use JDeveloper.
The OS is Windows XP, I've got 4G memory but maybe just 3G of it works.
But this is not the problem, because I've searched this problem on internet for days.
I did try to modify the number of
MaxPermSize in jdev.conf
and
Xmx and Xms in ide.conf
I've tried several combinations, and sometimes it works.
The disappoint fact is that even with the same combination of the settings, sometimes it works and sometimes it doesn't.
Sometimes it just work....
Sometimes it just doesn't work....
Sometimes it doesn't...and after rebooting it works again......
Sometimes even rebooting doesn't help.......
Sometimes when change MaxPermSize to a smaller number it works...and next time it may not work again....
Sometimes you change the MaxPermSize to some other number, save, and then change it back,,,,and it works again.....
but next time you try to use it, it may not work..........again....
I don't know what leads to these problems.....anyone could help, please?
Thanks in advance....having mentioned that you have tried all possible options. can u try to change the jdk??
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I trying to set up the Java Launcher program so I can use it in the windows command line by just entering java. How do I do this?
This works pretty much the same was as for previous versions of Windows -- place your JDK directory's "bin" subdirectory in your path and all of the Java executables, including the Java launcher, will then be in your path and run without specifying the specific directory they are in each time. See end of [this blog entry|http://marxsoftware.blogspot.com/2008/07/visualvm-included-in-java-se-6-update-7.html] for additional details.
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When we click on the icon to start firefox even though the process opens in task manager, the program screen doesn't open
If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes -
''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/793259]''
I installed Adobe dlm add-on and now Firefox will not open. I see the process starting in Task Manager but no window opens. Unistalled Firefox then re-installed but still no luck. HELP ME! I do not want to use IE! I presume it has something to do with Adobe DLM as ever since then it is not working.I had this problem for a couple weeks as well and it was extremely frustrating considering we use firefox for all our company tasks. Here is the solution:
First of all if you have no bookmarks you want to save, then go directly to step 7. If you want to save your bookmarks first, then follow these steps.
1. Shut down the computer
2. Reboot and open firefox
3. Go to Task Manager, right click firefox.exe, and click END PROCESS TREE
4. WAIT 30 SECONDS! Then Double-click the shortcut to try and open firefox again
5.Repeat steps 3 and 4 until firefox finally opens (trust me, eventually it will)
6. Once it finally opens, backup your bookmarks,
7. Download a copy of firefox from there website
8. Uninstall from programs menu and make sure to check the box REMOVE ALL COMPONENTS
9. install the new copy and BOOM! it works
If it doesn't work, you're an idiot. If you don't want to reinstall firefox, then you're out of luck. Good Luck! -
After altering the "Processes" list in Task manager, almost all of my programs show the iTunes icon, and when I click on, for example, Firefox, iTunes will load. Uninstalling iTunes restores the normal loading of other programs, but re-installation of iTunes makes the problem recur. Any answers?
First I'd set up a System Restore point. Then try applying the LNK registry fix from the following document:
File Association Fixes for Windows 7
Does that get your icons back to normal? -
Communication between UME on the Java Stack and ABAP Stack
Please look for the thread
Unable to log on to IR, ID, SLD....
before going any further. This thread follows.
The prob in brief is that,
On XI homepage, I am not able to get into anything after I entered the user name and pw.
I have some roles SAP_XI_ADMINISTRATOR for my user. I have checked in SU01 on ABAP Stack.
I thought that the error could be that the UME on the Java Stack is not able to communicate with the ABAP stack.
Any direction on this would really help me.
Regards,
-Naveen.Can any one help me in this.
-Naveen. -
Unable to create an instance of the Java Virtual Machine error
After extraction of SQLDeveloper files ran sqldeveloper.exe, received an error "Unable to create an istance of the Java Virtual Machine Located at path: C:\sqldeveloper\jdk\jre\bin\client\jvm.dll".
CMD WARNING from bin/sqldeveloper.exe: "Uknown directive: SetSkipJ2SDKCheck
Error occured during initialization of VM
Could not reserve enough space for object heap"
I'd appreciate any help.
THANKS!!I have the same problem.
But it seems that the problem occurs after windows update :
Test case :
1. extract SQLDeveloper.
OK
2. install IE7
OK
3. install update for IE7 + restart
(Cumulative Security Update for Internet Explorer 7 for Windows XP (KB939653)
and Security Update for Internet Explorer 7 for Windows XP (KB938127) )
KO with error message
"Unable to create an istance of the Java Virtual Machine Located at path: C:\sqldeveloper\jdk\jre\bin\client\jvm.dll".
It seems that the problem occurs after installation of
Cumulative Security Update for Internet Explorer 7 for Windows XP (KB939653)
Here the détails about update :
Cumulative Security Update for Internet Explorer 7 for Windows XP (KB939653)
Size: 2,0 MB - 8,3 MB
Security issues have been identified that could allow an attacker to compromise a system running Internet Explorer and gain control over it. You can help protect your system by installing this update from Microsoft. After you install this item, you may have to restart your computer.
More information for this update can be found at http://go.microsoft.com/fwlink/?LinkId=95045
Security Update for Internet Explorer 7 for Windows XP (KB938127)
Size: 213 KB - 780 KB
A security issue has been identified in the way Vector Markup Language (VML) is handled that could allow an attacker to compromise a computer running Microsoft Windows and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.
More information for this update can be found at http://go.microsoft.com/fwlink/?LinkId=94737
An idea to install IE7 update and continue to works with SQLDeveloper?
Thanks
Regards,
Eric -
Multiple instances of explorer.exe running in task manager
I got a dropper trojan virus on my computer that microsoft security essencials do not recognized but after running "superantispyware" antivirus I got discover it and delete it. After that, I still could find the infected files in my
administrator folders as .temp files and I just erased them. After that my computer started crashing and runing several instances of explorer.exe in the task manager with different memory values, some of them ascending to 350,000. I have set up my computer
to run just the basic services, I have tried windows in safe mode, ran other antivirus programs but still it is performing the same. As far as I have noticed other unusual process present are host.dll, dllhost.exe, and logonUI.exe. Any idea about it? Thanks
in advance for your help.I have the same issue. It started about a month ago when I was filling out a form online and had to quit and close the window. My system got very buggy (can't remember details), flashing, then really slow. Found a bunch of explorer.exe instances
in Task Manager. Ran Security Essentials and several other anti-viruses, nothing found.
Running Win7 Pro, sp1, 64-bit, CoreI5, 4Gb Ram
Restored system to a previous version, didn't work
Restored last system image, didn't work
Used System Repair Disk - ran Memory Diagnostic. Said it would give me report after reboot. Never saw a report after reboot. But only one instance of explorer.exe in task manager at that point. Took disk out, rebooted normally. After
20 minutes or so, the multiple instances were back.
Used Repair Disk again, ran Memory Diagnostic. Again, no report after reboot (leaving disk in machine both times), but only one instance running again.
Did this a few times with the same result, so now leaving disk in system and always boot from it.
Ran Security Essentials again, found that rovnix virus, removed, ran again, found it again.
Ran search for instances and found many. Here's an example:
C:\Windows\explorer.exe
C:\Windows\winsxs\wow64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7601.17567_none_b9fc4815c4e292b5
C:\Windows\winsxs\amd64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7601.21669_none_b0333b22a99da332
C:\Windows\winsxs\wow64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7601.21669_none_ba87e574ddfe652d
C:\Windows\winsxs\amd64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7601.17567_none_afa79dc39081d0ba
C:\Windows\SysWOW64
When I check properties on the now single one on Task Manager, this is what it shows:
C:\Windows\winsxs\amd64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7601.17567_none_afa79dc39081d0ba\explorer.exe
C:\Windows\explorer.exe
I was going to reinstall entire system, but was from an Anytime Upgrade which now says it's invalid. Much more to story on that (calls to MS support, etc.). -
Hello,
Please how can one run java application but will be invisible in the Windows task manager.
Which method can I use to make this possible.
Thanksbezgodo wrote:
Hello,
Please how can one run java application but will be invisible in the Windows task manager.
Which method can I use to make this possible.
ThanksYou can't do that in Java. But, there are some tools that wraps your java programs in a executable
format, some of them even includes the entire/partial JRE so you can run your Java program on any
Windows machine.
After you do the wrapping you can use other tools meant for Microsoft PE/NE executable (.exe, .com, etc files)
in order to make then undetectable in the process list.
But you loose portability. -
Can I revert to an older version? I tried all your published trouble shooting procedures to no avail to get Firefox 4 to open. When I try to run it, there is a process running in the Task Manager but no task or program actually opens.
I never had any problems with previous versions.There are various causes for this error, see [[Firefox is already running but is not responding]] for details.
-
Firefox does not appear on screen when started from the start menu or the shortcuts, but task manager says the process is running.
No - I get the message basically saying "Can't run program while Firefox is running. Please close down Firefox & try again".
I rebooted my computer and it all works now - but that's weird it was happening before. Kinda weirded out that it happened at all.
To avoid that happening again, I still wanna know what to do to avoid it or fix it for next time. Thanks
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