When Os Kills JVM Process?

How can we write OS Schedular to run as cron job? It
should work as a platform independent .These two statements are not compatible. Cron is not cross platform.

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How to limit the CPU% when invoking another JVM process

I need to keep the JVM's CPU% into a limitation like 20%, is that possible?
Thanks in advance.
Edited by: Lorna_Hu on Feb 4, 2008 11:26 AM
Edited by: Lorna_Hu on Feb 4, 2008 11:26 AM

I think you have the same problem with this thread.. check this .
MyPOV
Yesterday is history. Tomorrow is mystery. Today is a gift.

The plug in container for Adobe Flash eats up 100% of my CPU on a regular basis and I have to go in to task manager and kill the process.

Screen updates become very slow and intermittent. I then start task manager to see what is using either ram or cpu, and invariably it is Plug-in container for Firefox using most of the cpu resources. When I kill the process, I get the message at the top of the browser that Adobe Flash plug-in has crashed.
I understand that Flash is useful/necessary for many applications, but is there a way to limit the resources it uses?

Do you have Logitech gaming software installed on the PC? If so, perhaps try the suggestion from the following post:
Re: Everytime I close Itunes it loads back up

When I exit firefox it closes the program but it gets stuck in memory so when I open it again i have to kill the process in task manager

When I exit firefox it closes the program but it gets stuck in memory so when I open it again i have to kill the process in task manager, and it can be right away or I can come back a few hours later and its still stuck in task manager, I am tired of having to kill the processes every time I use firefox.
== This happened ==
Every time Firefox opened
== a week or so a go ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; AntivirXP08; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Hanging at exit is most often caused by an Extension or a Plugin.
'''Kill Application'''
In Task Manager, does firefox.exe show in the '''Processes''' tab?
See: [http://kb.mozillazine.org/Kill_application Kill Application]
'''Causes and solutions for Firefox hanging at exit:'''
[[Firefox hangs]]
[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit]
[[Firefox is already running but is not responding]]
'''Safe Mode'''
You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode. When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". Test to see if the problem you are experiencing is corrected.
See:
'''[[Troubleshooting extensions and themes]]'''
'''[[Troubleshooting plugins]]'''
'''[[Basic Troubleshooting]]'''
If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it by enabling '''one at a time''' until the problem reappears. '''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

Firefox will be hung when begining to download a file. Only using the tasker to kill the process can be resolved.

when beginning to download a file especially a big file, my firefox will be hung, and it will occupy about 50% of the cpu resource. I can only kill the process to solve this problem.
The problem was happened before installing the plugin "flashgot".
this problem was occured in version 3.6.12 too.

Questions:
* How can I download a binary file like an mp3 from a server to a client?There are a ton of examples on the internet on how to download files. If you are having a problem, please post your code.
>
* Where I have to put my server application? I supose that I must create a jar, save it on a folder and execute it at PC start-up, right?Your server application will exist on a server and will run the application. hence the reason for the server. The best best for you is to read some online tutorials on client/server and how it works.

What Happens when u kill a backgroud process

What Happens when u kill a backgroud process?
such as kill- 9 ora_smon
Will the oracle automatically perform recovery???
will the database startup?

If you want to face what actually will happen, just make it on test environment (test db).
Then check your db status, instance will be abort.
Do you know what SMON`s purpose ?
If you_dont_know then
make it; (ps -ef | grep smon take PID, then kill -9 PID);
end if;
SMON - System Monitor process recovers after instance failure and monitors temporary segments and extents. SMON in a non-failed instance can also perform failed instance recovery for other failed RAC instance.
Here you can read about Oracle background processes:
http://www.dba-oracle.com/t_background_processes.htm
and
http://download.oracle.com/docs/cd/B10500_01/server.920/a96524/c09procs.htm

Anybody could told me when the JVM process will disappear?

1.The system is RHEL5.1 and PC is my private machine, not connect to internet or local network.
2.I was had a tomcat performance test, login as "tomcat" and start tomcat server, it's pid was 8902.
3. after 12 hours, I relogin to the server but can not found process 8902.
4.I could not found any hs_err_pid.log and core.pid file under "tomcat" home, and only myself use this machine.
5. the jvm process have enough privilege for the file read and write.
So, I lost my road, why the jvm process will disappear and not leave any mark? thank you for help me !

Roy_Li wrote:
1.The system is RHEL5.1 and PC is my private machine, not connect to internet or local network.
2.I was had a tomcat performance test, login as "tomcat" and start tomcat server, it's pid was 8902.I don't know how you start it, but it's possible that your program gets a hangup signal and quits when you logout. You should in that case start it with nohup.
[http://en.wikipedia.org/wiki/Nohup]
Kaj

Taskkill /F broken in windows 8 when applied to a process that crashes on exiting

It appears that Windows 8 has broken the taskkill command in part at least (actually, I think it is more likely a broken ability to set the debug attribute, which in prior Windows versions allowed taskkill to kill programs even if in a different security
context; but I don't know exactly how to test that or prove my hypothesis). When attempting to kill a process that is hung on exit (e.g., attempted a normal exit from the program, but it hangs and fails to exit, and continues to consume system resources),
there appears to be no way to terminate the application/service, and an "access denied" error is generated even though run from the administrator command prompt.
I have had this happen now many times with chrome.exe (which seems to have lots of issues with Windows 8 in general, but especially when exiting), as well as Skype.exe (a perpetual problem child program under any system). It is repeatable if you can
get any program to crash/hang on exit:
(1) start a bunch of chrome.exe windows, especially ones that require resources like scripts, and then attempt to exit chrome window by window - this will cause chrome to crash on exit 5/10 times. Confirm hung process via ctr-shift-esc and see
that at least one chrome task is still running (chrome window may or may not still be visible)
(2) From the administrator command line: "taskkill /IM chrome /F" which will give the access denied error.
(3) psutils is also unsuccessful: pskill chrome /F also gives same error (run from administrator command prompt)
As I understand prior Windows releases, there is a debug attribute that was set by these particular utilities (under Windows 7 and earlier) which allowed taskkill and pskill to kill processes even when the task manager failed to do so. It seems
that something is broken under Windows 8 now in that regard.
Any ideas how to fix? is there a registry fix? Another utility that works under Windows 8?
JeffN

Hi,
I tried the command in Windows 8, it works with no problem. I can even kill explorer.
Juke Chou
TechNet Community Support
The problem is with killing certain "runaway" processes. I can kill chrome just fine ... until it crashes! Once it crashes, it is unkillable. Something is not right.
JeffN

Unable to kill work process and user sessions.

Hi Gurus,
Iam facing a different problem in my prd system.Dialog process of a particular user has been running continuosly for long time, when i killed it with cancel with core or with out core option in sm50 still it is starting automatically on different PID and going in to loop.Even though user is not logged in and no back ground jobs are running still the process is running on its own.Even i tried killing the PID from OS level using DPMON but was of no help.
I tried to kill the user session and log him out from sm04 from it was not happening, locked the user also but was of no help.
Has anybody faced this situation?Is there any option excluding restarting the system to solve this issue.
Thanks&Regards
Prashant

Hi Prashant,
In case of multiple instances you have to log off the user from system wide select this option from SM04 while deleting user session again look for the action in SM50 for the process and if possible get details by activating trace from ST05 and filter with user, wp.
Thanks,
Saleem

Frozen process on report server after killing user process

Hi,
I've following problem. When user kill request(user process on PC) on creating report during process
(PDF file, report server 10g), the process on OAS stay frozen and nobody is able to create own report. When we use for creating report(PDF) Adobe destiller it was OK, but in this time we use options in ORACLE Report for creating PDF
Ivan

Primary Server Listener File
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.200)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = jsl)
(ORACLE_HOME = D:\oracle\ora92)
(SID_NAME = jsl)
Standby Listener File
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.201)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME = D:\oracle\ora92)
(SID_NAME = jsl)
Thanks & Regards
Vijayaraghavan K

Urgent need to kill a process

Hi,
I have loaded the data through DTP to DSO. The load was successful and the activation was taking long time so i cancelled it manually. went to sm50 server and pid and cancelled without core and with core also
Job log is
Job started
Step 001 started (program RSODSACT1, variant &0000000000041, user ID .....
Activation is running: Data target USR_LOGN, from 974 to 974
Overlapping check with archived data areas for InfoProvider USR_LOGN
Data to be activated successfully checked against archiving objects
Status transition 2 / 2 to 7 / 7 completed successfully
Job was mannually set to cancelled
NOw when i am tryig to delete the req itsnot the deletion job is gng to released state and is not getting to active state for somany times. checked no locks for the DSO and a job for the same rpocess id isrunning
I am unable to kill a job in the sm37 is there any way through which i can kill that process. I tried sm66 and sm51 many times but no use
its urgent please
K Janardhan KUmar
Job status was manually set to 'cancelled'
Message was edited by: Janardhan
Janardhan Karmala

Hi,
you said job is in release state. follow the below steps:
1. Select the job in sm37.
2. Go to change mode.
3. change the priority to A.
4. Click on schedule and schedule it immediately.
your deletion job will start immediately and after deletion you can start your activation again.
Let me know if it helps?
Mayank

Inserting a Recordset Kills PHP Processing

In Dreamweaver 11.0 (CS5) on both MAMP and a live server, I am experiencing a puzzling issue.
Inserting any Recordset kills PHP processing. For example, this document works perfectly:
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Untitled Document</title>
</head>
<body><?php echo “Hello, world.” ?><?php phpinfo() ?></body>
</html>
As soon as I add any Recordset to the page, those two php statements simply stop working. In fact, the Recordsets return no data on the page. After I delete the Recordset code that Dreamweaver had inserted, and restore the page, php statements magically begin working again!
(During the creation of the Recordset, the Test button confirms all columns are present, and the two rows are fine.)
Any clue to what’s going on?

I've solved part of this issue. It turns out that Dreamweaver copies to the testing server all new files and changes to files EXCEPT... the Connections folder it creates and that folder's contents. The user needs to do that manually.
However, after I copied the Connections folder, Dreamweaver refuses to Insert any Data Object.
For example, it won't insert a Repeat Region or a Dynamic Table. When I select
Insert->Data Objects->Dynamic Data->Dynamic Table
Dreamweaver returns this error:
While executing insertObject in DynamicTable.htm, a JavaScript error occurred.
Ditto the Repeat Region.

How to increase JVM Process size for WebLogic running SOA Applications.

Hi,
I believe 32 Bit OS can address up to 4GB memory so theoretically 32 Bit JVM can use 4GB but practical convention is 2GB as other 2GB is used by OS itself and also this default JVM Process size is set somewhere and I also believe that if JVM is 32 bit on 64Bit OS even though JVM will run on 32Bit Virtual Machine so JVM does not know that it is 64Bit OS in that case again it can use max Process default size up to 2GB.
And for 64Bit JVM, I can allocate more than 4GB depend on my available RAM size to Xmx, MaxPermSize parameters in java.exe file and after that I can set the same value in “setSOADomainEnv.cmd” or to “setDomainEnv.cmd” file.
But I am 99% sure by just assigning more memory value to Xmx, MaxPermSize in “setSOADomainEnv.cmd” file only won’t work (not setting Xmx in java.exe), if it would have worked then in my case when I was assigning 1536 to Xmx in “setSOADomainEnv.cmd” file then why it was showing out of memory error. I think that is because it was only taking default 2GB for my 32 Bit JVM not considering 3GB or 4GB. So i think i have to change default memory size what JVM can use (<http://www.wikihow.com/Increase-Java-Memory-in-Windows-7> but i am using windows 8 so for that I don’t know the option to change this default Process Size)
I also believe that first JVM start and before start it check how much memory it can use from it’s own –Xmx parameter in some ware configuration or java.exe file and after that it allocate that much size of JVM Process Memory in RAM then after it loads Weblogic or Java Applications in its (Heap + Non-heap + Native Area) which are parts of JVM Process memory
I read post on :< http://stackoverflow.com/questions/3143579/how-can-jvm-use-more-than-4gb-of-memory > and < http://alvinalexander.com/blog/post/java/java-xmx-xms-memory-heap-size-control >
All used :
java -Xmx64m -classpath ".:${THE_CLASSPATH}" ${PROGRAM_NAME}
java –Xmx6g //command which will call java/JVM interpreter which will hold –Xmx parameter to set Heap size for JVM
before JVM comes in memory (JVM process memory)
now my question is can I manually open any configuration file or java.exe same like “setSOADomainEnv.cmd” or “setDomainEnv.cmd” (I know since java.exe is exe I can’t open simply but I want similar work around)
so that I don’t need to type java –Xmx6g every time when I run weblogic (and then later I can change weblogic “setDomainEnv.cmd” Xmx and PermSize to more than default size 4GB to 5GB or 6GB in the case of 64Bit OS)
Please correct me if I am wrong in my understanding.
Thanks.

These days the VM will detect a "server" machine and set up the memory appropriate for that.
You can create a simple java console application and have it print the memory settings (find the appropriate java class fort that.)
There is of course the possibility that your application is running out of memory because it is doing something wrong and not because the VM doesn't have enough memory. You can force that in a test setup by LOWERING the maximum amount of memory and thus making it more likely that an out of memory exception will occur.

Killing child process, not just the shell

Killing child process, not just the shell
#241 - 07/11/03 11:30 AM
Edit post Edit Reply to this post Reply Reply to this post Quote
Hi,
I am working on a system for automatically testing student submissions on an introductory course about unix scripting. The program works by running a test script on a student submission, using Runtime.getRuntime().exec(). The Process object has a limited life span of 10 seconds (by default), and if it is still running after these 10 seconds, Process.destroy() is used to kill it.
A bug exists when one of the submissions being tested times out. When the destroy() method is used it leaves a child process running... since students can also run
some tests from the file submission client, the number of hanging processes soon adds up as they test and test again to get it right before submission. Eventually this results in too many processes and the server keels over.
Does anyone have any ideas on killing these hanging processes?

Not much help, but I think this is a known bug ...
http://developer.java.sun.com/developer/bugParade/bugs/4770092.html

Can't kill hung process in Leopard

I am having very annoying issue with Leopard. Time to time some applications get stuck and I can't kill them using "force quit" or command line "kill -9". Most of the times when this happens, I can't log out and start new applications. I cannot even restart the computer cleanly as it cannot log me out cleanly (BTW, is there a force log out or force restart?) Once this happens everything goes downhill and eventually I have to do hard reboot by pressing power off key in the back. That creates another problem. I have a USB external disk that I use as time machine backup. After I do hard reboot and machine boot up, finder thinks that index on the external disk is not up to date and starts indexing it from scratch and takes 2-3 hours. Also, when it starts building index, it spends good 5 minutes or so trying to estimate the index building time. During that time, I cannot search anything on the machine.
I called Apple support twice. First they asked me to do "archive and install". I did that but problems still continued. After that they said do "disk check" and "disk permissions check". "Disk check" didn't show any problem. "Disk permissions check" found many files with permissions problem and they were all fixed. Even after that the problem continues.
I have 4 users on the machine. I am the administrator. Others are limited accounts. I have noticed hang problem with all accounts. On my account it occurs with many processes like Safari, imovie, iPhoto, and even finder. On other accounts I have seen it mostly with Safari. I saw the problem with Safari on other accounts even with Tiger. On other accounts though I am able to kill the application using "force quit" but not on my account.
I think the root cause of all of these is Leopard's inability to force-kill a process. I have a hunch that this happens (not able to kill app in my account) with processes that deal with devices. For example, Iphoto deals with external memory card, Imovie deals with external digital camcorders and so on.
I have an open case with Apple support. I want to see if others are running into same issue.

I was having these very same issues.
I wiped the drive with zeroes and tried to reinstall Leopard from scratch. Install failed. Checked the install DVD, it passed its own test. Verified the hard drive, fine.
Reinstalled Tiger. Everything fine. Tried to upgrade to Leopard, install DVD was again failng.
I did some research.
*It turns out that Leopard on PPC Macs will freak out on many types of third party RAM.*
I removed the aftermarket stick of RAM and Leopard installed just fine and ran fine. No more problems. I put the RAM back in, problems returned.
There you have it. Tiger was fine with the memory, Leopard isn't. And this is for some reason a PPC-specific issue.
Search for:
"The installer could not validate the contents of the ‘base system’ package. Contact software manufacturer for assistance."
Here are two to get you started:
http://forums.macrumors.com/showthread.php?t=374917&page=2
http://www.mobrec.com/2007/10/27/leopard-is-damage-if-you-are-on-powerpc-do-not- install/
The key is in realizing that both sets of symptoms occur for some people because they're 'lucky' to get Leopard installed in the first place. If you wipe and install, you get to witness all the behaviors under a controlled experiment (memory in vs out).

When Os Kills JVM Process?

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