Setting jvm arguments

Hello,
I know there is a way to get jvm arguments from a java program using the java.lang.management.RuntimeMXBean.getInputArguments() method.
But, is there a way to set them from a java program ?
Would appreciate any help.

For a web application, the JVM properties indeed need to be set for the application server's JVM and as such it cannot be set in the IDE. (The IDE cannot pass the parameters anyway since it merely invokes the commands provided by the appserver to start/stop/deploy-apps).
To solve your problem, you will need to set the JVM arguments at the appserver. You can set the JVM arguments in the admin console of the appserver. If you jush wish to set some environment properties for a given webapp, then you can use 'System.setProperty("environment.setting","local");' in the app's initialization code.

Similar Messages

Why are my JVM arguments not taking effect

Hi,
I'm trying to set the -Dweblogic.security.SSL.protocolVersion=TLS1 at the server level as well as application.
For the application (Agile PLM), I added the above into the Arguments section in the Console UI and I can see the change in the config.xml but I can still connect to .../Agile using nothing SSL3 when I set my browser to use it only. I know my browser works OK because I changed our Atlassian product and it gives me errors with just SSL3.0.
I'm also trying to set the set setting at the server level because I believe that the LDAP SSL error that I'm getting is due to the Domain Controller no longer accepting SSL 3.0 but I tried changed SetDomainEnv.cmd and SetEnv.cmd and neither would work as I can still get the /Console page.
I'm on Windows 2008R2, WLS 12.c Agile 9.3.4
in every case, I shut down WLS and restarted it.
What is the correct file for WLS12.c on Windows to set the JVM arguments as I find answers to update different files or use WLST which I haven't used it yet but I should be able to just update the correct file and get the Protocol enforced?
The command that I added to my two files:
on SetDomainEnv.cmd:
set JAVA_OPTIONS= -Dweblogic.security.SSL.protocolVersion=TLS1 %JAVA_OPTIONS%
on SetEnv.cmd:
SET JAVA_OPTIONS_WIN=-Dweblogic.security.SSL.protocolVersion=TLS1
Thanks
Anatole

Connect your device to a computer's itunes - that's the most reliable way to copy photos. You should be doing this anyway, otherwise if the device craps out, you may end up losing all your photos. Even if you have backup to icloud turned on - many users have discovered that a restore didn't return their pictures.
As for photo stream...
Check the following:
From your Home screen, tap Settings > iCloud > Photo Stream, and make sure the slider is set to the ON position.
From the Home screen, tap Settings > Wi-Fi, make sure the slider is set to ON, and that your device is connected to a wireless network.
Ensure that Camera app is closed on the device where you took the photo. Photo Stream will not upload photos from an iOS device until the Camera app is closed.
Ensure your iOS device has not fallen below 20% battery power. To preserve battery life, Photo Stream downloading and uploading are disabled when the battery reaches this threshold. Downloading and uploading will resume once you charge your device, and the battery charge is greater than 20%.

Specified in jnlp jvm argument but not   applied   by browser

jlnp file specifies passing passing vm arguments   using java-vm-arguments attribute , it also provides list of acceptable arguments as mentioned here http://docs.oracle.com/javase/7/docs/technotes/guides/javaws/developersguide/syntax.html.
In my case , jvm argument is   -Djava.security.debug=sunpkcs11,pkcs11. I added   this to jlnp file but this is never loded by the browser jvm. This is not mentioned in the above link so can this argument be passed to an applet?
here is my jnlp file
<pre>
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
    <information>
        <title>Applet</title>
        <vendor>ARTMS</vendor>
    </information>
    <resources>
        <j2se version="1.7+" java-vm-args="-Djava.security.debug=sunpkcs11,pkcs11"/>
        <jar href="dsapplet.jar"/>
    </resources>
    <property name="java.security.debug" value="sunpkcs11,pkcs11"/>
    <applet-desc
         name="Applet"
         main-class="com.service.TestApplet"
         width="900"
         height="300">
             <param name="java_arguments" value="-Djava.security.debug=sunpkcs11,pkcs11"/>
     </applet-desc>
<security>
<all-permissions/>
</security>
     <update check="background"/>
</jnlp>
</pre>

I tried with java web start still the jvm argument is not applied , please advice can this argument -Djava.security.debug=sunpkcs11,pkcs11    be applied to java web start ?

Why does buckminster not resolve my passed JVM argument?

I have a jenkins job which uses buckminster to build an eclipse product.
At the beginning I have an "Extended Choice Parameter" where the "customer" key can be selected.
In the buckminster configuration I use this "customer" variable to select the right cquery:
import '${WORKSPACE}/source/scodi-customer/${customer}/server/features/ch.scodi.${customer}.server.feature/site.cquery'
Since the variable "customer" is per default not available in the commands, I added the following to the "JVM arguments":
-Dcustomer=${customer}
This all used to work well, but now I updated the server and build environment from Java 1.7 32-Bit to Java 1.8 64-Bit. Since then I get the following error trying to build:
java.io.FileNotFoundException: [Path to job]\source\scodi-customer\${customer}\server\features\ch.scodi.${customer}.server.feature\site.cquery (The system cannot find the path specified)
Before the variable was resolved fine.
Is this a buckminster or java8 problem, not being able to resolve the ${customer} variable? Is there maybe another (cleaner) way to pass the variable to the buckminster configuration?
I did some further testing and added the following to the JVM arguments, I get the same exception referring to a missing ${customer}. It looks to me that JVM arguments are ignored.
-Dcustomer=CUSTOMER

Finally I found a workaround.
I had to rename my "customer" variable to "CUSTOMER", now it is resolved in the buckminster command area:
From:
import '${WORKSPACE}/source/scodi-customer/${customer}/server/features/ch.scodi.${customer}.server.feature/site.cquery'
To:
import '${WORKSPACE}/source/scodi-customer/${CUSTOMER}/server/features/ch.scodi.${CUSTOMER}.server.feature/site.cquery'
Also my JVM parameters from:
-Dcustomer=${customer}
To:
-Dcustomer=${CUSTOMER}
Found out the JVM parameters are not relevant to the buckminster command interface but are used later in "cspex" files.
Running Jenkins on a Windows machine this might be the Problem...
So the actual problem was the naming of the "Extended Choice Parameter", not being capitalized.

Default JVM arguments

Hi
I would like to know what are the default JVM arguments when server jvm is started without any additional flags, like this:
java -server myapp
I have been unable to find bullet proof document from those. I'm running Sun 1.5.0_08 on 32bit Win2003.
I would espacially be interested on thread stack size, useTLAB?, xmx & xms...
Br
Draes

Ah, yes - it is the defaults for MaxPermSize
that are 32m for client and 64m for server.The default MaxPermSize is 64m for both client and
server, at least in 1.4 and later releases.
However, starting with 1.5, the default value for
PermSize, which is the initial size of the
permanent generation, is different: server is 16m,
client is 8m in 1.5 and 12m in 1.6.Already from 1.4.2: http://java.sun.com/docs/hotspot/gc1.4.2/faq.html (FAQ #30)
I do find it strange that I can find no mention of these changes in the release notes;
http://java.sun.com/products/archive/j2se/1.4.0_04/ReleaseNotes.html
http://java.sun.com/products/archive/j2se/1.4.1_07/ReleaseNotes.html

Peformance of setting JVM attribute or callback.

I have a program that receives feeds in the native world and then calls the JVM through JNI with a callback like receivedFeed(attr1, attr2 ....attr20). There are a large number of attributes being passed back for each callback.
The question I have has to do with performance.
Is it faster to use this callback approach where the attributes are put in the signature and then reassembled on the java side into an object? Compared to directly setting each attribute on the Java object from within the native world and then prompting the JVM with a callback like updated();

Very true. I would normally agree. Wrap the parameters in an object to minimize the number of arguments and make it flexible.
Specifically, I am thinking about performance and I am willing to compromise a bit on the beauty of the solution, if it is faster.
I have receiving a feed that has about 20 data items. Mostly ints and longs, and maybe a string. This format is relatively fixed and is not likely to change any time soon. If it does, it is all of my own code so the changes are easy.
In the parameter passing approach, my assumption is that I would have a callback into the JVM with a long signature like
receiveFeedCallback(jint1,jint2,jint3,...jint20);
For the object wrapping approach, I would first have to construct an object. and then do the callback:
jvalue args[4];
     args[0].i=(int) 0;
     args[1].i=(int) val1;
     args[2].i=(int) val2;
     args[3].i=(int) val3;
jobject trans = jniENV_->NewObjectA(clazz,"<init>",args);
jniENV_->CallStaticVoidMethod(jObj,_method_JNITEST_callback,feedTransaction);
In the end, I probably need to know what the overhead of creating a class in Java vs. C++ is compared to the parameter passing approach.
I may be doing this callback about 20(or more) times per millisecond. About 85% of the time in my program is on this one step so I would like to try the fastest approach possible.
In the end, I am trying to write a test case to test the performance....which leads me to another questions and likely another thread in the JNI world....to be posted soon.
Thanks for the help.

Setting jvm size

hi guys
i am using this command line argument to increase my jvm. it must be done on the command line as i am going to create a bat file for my users to set up their environment.
java -Xmx256m -Xms128mi not sure if its working as it just lists all the java options (the ones you get when you type 'java' and press return) when i hit return.
does this mean its working? im expecting a more definitive message.
thanks

hm... this is interesting.. so if i am able to get
this file in my applet and update the appropriate
line, it should update the jvm heap size? the lineid
update is :
deployment.javapi.jre.1.5.0_06.args=-Xmx164mSince the applet already runs, the heap size will not
change.
It will change for the next applet run, after closing
the browser.
Note that I did not try all this, so it is up to you
to experiment.
My idea was not to change the file from the applet.
You said 'I cannot ask all the users to change the
heap size
in the Java control panel'. I just offered you an
alternative to
this: write a program that changes the file and find
a way
to make them run this program.ok thanks for the suggestion..
i think i may have a link on the homepage which opens an applet that sets this file.. and then instruct them to restart the browser. it would be nice to keep it all within the browser instead of having them click an exe..
ill let you know if it works.
thanks again so much.

Spaces in JVM arguments

On Windows, I want to hand a directory path to the JVM in the following way
java -Dworking.dir=<mydir>
Unfortunately, the <mydir> is provided by the %USERPROFILE% environment variable and
contains whitespace (c:\documents and settings\username). How can I quote this argument to prevent the JVM from complaining about the bad option 'and' which supposedly starts after the first whitespace?
Thanks a lot
Andreas

If I do:
set JAVAOPTIONS=-Dworking.dir="%USERPROFILE%"
java ...
quoting does NOT workWindoze shell (cmd.exe) deals with the quotes you supplied EXACTLY as it is supposed to.
contrary to the
straightforward shell command.
I need JAVAOPTIONS because it is the only way to
have the parameter passed to Java WebStart.The exact behavour varies between different Windoze versions.
You need to think laterally. Starting from
set _JAVA_OPTIONS=-Dworking.dir=%USERPROFILE%first, there are spaces in that so we need the whole thing quoted
set _JAVA_OPTIONS="-Dworking.dir=%USERPROFILE%"next, that probably won't work as it is, assuming JAVAOPTIONS expands to
-Dworking.dir=C:\Documents and Settings\fubarso we need to insert some escaped quotes as well
set _JAVA_OPTIONS="-Dworking.dir=\"%USERPROFILE%\""which, with any luck, should see JAVAOPTIONS expanding to
-Dworking.dir="C:\Documents and Settings\fubar"If you still have problems, Google for how to escape special characters in the Windoze shell.

Adding JVM arguments programmatically

Hi,
I want to start my JVM without -Xdebug etc. arguments. E.g. java MyClass
And on specific event it will programmatically (without restarting JVM) set the debug arguments and will be accessible for remote debugging. Is it possible and how?
Thanks.

Benzion wrote:
I already explained. We want the Server to run without debug, to get best performance. And to be able to switch debug on and off when we need debugging. Without restarting the server.No, you didn't explain that at all. You just said you wanted to turn debug on and off. You didn't say why.
Have you measured any kind of performance degradation with leaving it turned on all the time? I doubt there is any. It will just sit listening for a debugger to connect. If one doesn't, then no resources will be consumed (apart from one listening server socket).

How to set JVM heap?

Hi,
I don't know where to set the JVM heap...can anybody give me step by step to set the JVM heap..

What do you mean by set the heap? Set its size?Yes, what I mean is heap size. I got the problem java.lang.outOfmemory, and try ind the solution. Some of solution said set the heap size but it didn't explain in more detail.
Look at the arguments to java. (I mean "java" as in
"java.exe", the JVM executable.)What u mean look at the arguments to java?

How to set JVM system properties in Oracle Portal ??

Hello Guys,
I want to set javax.net.ssl.trustStore="path to keystore" ,JVM system properties on oracle portal,
Like i want to configure my keystore with oracle portal so that my application can make a success full connection with back end using https.
i read the following note from one of the Oracle tech note,which says that
It is important that this system property is passed as a command line option to Oracle Application Server Containers for J2EE (OC4J). Setting the property in oc4j.properties will not help because the system property is read first before OC4J reads this file. Therefore, it is best to modify the <java-option> line in the OC4J_portal section of ORACLE_HOME/opmn/conf/opmn.xml.
So, i made the required changes to OC4J_portal section of opmn.xml file as below
added value is shown in bold
<data id="java-options" value="-server -Xrs -Djava.security.policy=C:\oracle\OraPortal\j2ee\OC4J_Portal\config\java2.policy -Djava.awt.headless=true -Xmx256m -Djavax.net.ssl.trustStrore=C:\keystore1 -Djavax.net.ssl.trustStrorePassword=password1"/>
Even after making these changes, my application not able to make connection using https.
Could u guys explain me, what things are going wrong or somethings else i need to do to make it work.
Any thoughts would be highly appreciated.
Thanks
<Neeraj Sidhaye/>
http://ExtremePortal.blog.co.uk

Hello Guys,
I want to set javax.net.ssl.trustStore="path to
keystore" ,JVM system properties on oracle
portal,
-Xmx256m -Djavax.net.ssl.trustStrore=C:\keystore1
-Djavax.net.ssl.trustStrorePassword=password1"/>Hi,
if the above is an exact copy of the values you inserted then it looks like you have two typos in the command line parameters.
-Djavax.net.ssl.trustStrore -> trustStore
-Djavax.net.ssl.trustStrorePassword -> trustStorePassword

Setting JVM options in a capi program with JMSJVMOPTS

Hello,
          We are using Weblogic's capi to access JMS from a C program. We are running on a Sun Solaris 2.9 machine and linking our program with the 1.4.2 Java Vritual Machine. The program runs ok but we would like to turn on the "verbose:gc" option of the JVM that's started by the capi.
          We've tried using the JMSJVMOPTS environment variable specified in the capi documentation to do this but it doesn't apprear to be working. We set JMSJVMOPTS to "-verbose:gc" and run our program but it doesn't seem to have any affect. Is this the proper way to specify additional options to the JVM when using the capi? Are we doing something wrong? Any help or suggestions would be appreciated.
          Thanks,
          Bill Sublett

Yes you can but you will be implementing a type a schedule which you will have to develop within your BPEL process.
I'm assuming that you are populating a open interface table, or a custom table and the concurrent program reads from this location.
A way you could do this is select from the table before you do an insert, if the row count is X or greater then invoke a concurrent program.
cheers
James

Unable to set JVM file encoding to UTF-8 on Windows

Hi,
I am running Tomcat on 1.5.0_05 JRE. I tried several things to set the jvm file encoding to UTF-8 instead of the default Cp1252, but no luck yet.
The most intuitive approach seems to be to use a JVM option like
"-Dfile.encoding=UTF-8"
but this does not seem to have any effect. I have a WinXP pro m/c. I saw some bug reports which seemed to indicate that changing the JVM file encoding is not an available feature....is that correct? I would really appreciate any help/pointers on this. I will post the solution if I find something in the meantime.
Thanks,
Sriram

I am fail to set it too. I think it is better to separate the file.encoding into two, one for accept local OS, the other for compile .java and .jsp and so on files. So we can change it and the bugs will be decrease!

Setting Partition Arguments (log flags) using FSCRIPT??????

Hi,
I can't succeed in setting parameters in FSCRIPT that require quotes (as
__-fl "(err:sh:*)"__:
1)
SetPartArgs VisionFrontEnd "-fl aFile(err:sh:*) +(trc:user9:*:*) -fm
(n:1024,x:800000,i:128)"
This sets the line, but the partition can't start.
2)
SetPartArgs VisionFrontEnd "-fl "aFile(err:sh:*)"
"+(trc:user9:*:*)" -fm "(n:1024,x:800000,i:128)"
(with or without '\' protecting)
This sets the line to 'empty', with an error saying that aFile(err:sh:*)
can't be found
How to set something on the parameter arguments list that contains log flags
?

While the user long and short name is a matter of convenience when logging in (the computer will "prefill" the user name at the server login window based on what account was used to log on to the local machine), what counts is the UID number of the account.
Most "home" user accounts end up with a "501" UID meaning that it is the first account created and it is an administrator account on the home machine.
What we have found is users are quite creative as to what they use for account names on their home machines and most times they are not compatible with the company standard of first initial last name we use for accounts.
So we let them do what they want but let them know the login and password of the network account so they receive access to network resources based on that account.

JVM arguments

Hi,
I am using a pre-determined set of VM arguments where -Xmx was 500m. I am a bit skeptic about the 500m, would there be any problem of not using VM memory arguments which are not multiples of 256m(I am not sure if there is a word for memory sizes which are exact figures like 256, 512, 1k etc).
Would there be any performance difference(big or small) between using 500m and 512m as the -xmX VM argument.
Thank you very much,
Amnesiac.

1) You have allocated 500 MB. You use 296.
2) You have allocated 512 MB. You use 296.
Do you think there's a performance difference? :) There won't be unless your program's GC behavior accidentally leads to thrashing in that lat particular 12 MB, which is unlikely.
The word you are looking for are "powers of 2" I think, by the way.

Setting jvm arguments

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