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  • Why are all the tabs except MBeans disabled in JConsole?

    - by Kem Mason
    I'm trying to connect to JConsole on a server running: java version "1.6.0_0" OpenJDK Runtime Environment (IcedTea6 1.4.1) (6b14-1.4.1-0ubuntu12) OpenJDK 64-Bit Server VM (build 14.0-b08, mixed mode) from my local machine, running: java version "1.6.0_24" Java(TM) SE Runtime Environment (build 1.6.0_24-b07-334-10M3326) Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02-334, mixed mode) When I connect to jconsole on the server, all the tabs except the MBeans tab are disabled. If I run the same application on my local machine, and use jconsole to connect to it there (using the remote interface still), all the tabs are enabled just fine. Everything I have seen only suggested the possibility that the server was 1.4 or earlier.

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  • Running 32bit eclipse on 64bit windows.

    - by james
    I am trying to use a 32bit installation of eclipse on my 64bit windows machine. I have eclipse extracted to my C: Drive and Java installed in ProgramFiles(x86) When I go to start eclipse I get the error:Failed to load the JNI shared Library"C:Program Files(x86)\Java\jre6\bin\jvm.dll" I looked and the file is not there. I am setting something up wrong?Just did a fresh install of Java before trying to run eclipse.

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  • Adding a jar file to CLASSPATH is still not executable

    - by Simon O'Hanlon
    Perhaps I just don't understand how the whole CLASSPATH environment variable works when trying to find .jar files on your system. I thought if you specified it, you could launch .jar files with java in much the same way that you can launch executables that are on your path. I have an executable java archive (.jar file) on my system, that I stuck in /usr/local/bin/gatk/. I added this to my CLASSPATH via: export CLASSPATH=/usr/local/bin/gatk/GenomeAnalysisTK.jar I thought this would make the .jar file visible to my JVM. When I try to invoke it with java -jar GenomeAnalysisTK.jar #Error: Unable to access jarfile .gatk/GenomeAnalysisTK.jar I can invoke it setting the absolute path, e.g. java -jar /usr/local/bin/gatk/GenomeAnalysisTK.jar, however I'd rather not type the full path each time. I have read many of the linked tutorials but somehow I don't seem to be getting this right and I can't understand what I am doing wrong.

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  • "Error occurred during initialization of VM" in linux server

    - by Khoyendra Pande
    I am trying to run java command in linux server it was running well but today when I tried to run java I got some error- Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. my memory space is - root@vps [~]# free -m total used free shared buffers cached Mem: 8192 226 7965 0 0 0 -/+ buffers/cache: 226 7965 Swap: 0 0 0 How can I solve this problem.

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  • JVM disappeared on Mac OS X Snow Leopard 10.6.8

    - by weisjohn
    I'm working in Eclipse one night, (also using Android's DDMS from the commandline). The next morning, I open the lid... attempt to run Eclipse and get an error. me$ sudo /Applications/eclipse/eclipse JavaVM: requested Java version ((null)) not available. Using Java at "" instead. JavaVM: Failed to load JVM: /bundle/Libraries/libserver.dylib So I then attempt to find out where my JDKs are pointed: me$ ls -la /System/Library/Frameworks/JavaVM.framework/Versions/ total 64 drwxr-xr-x 12 root wheel 408 Nov 16 10:44 . drwxr-xr-x 12 root wheel 408 Sep 7 09:39 .. lrwxr-xr-x 1 root wheel 5 Sep 7 17:07 1.3 -> 1.3.1 drwxr-xr-x 3 root wheel 102 Dec 2 2009 1.3.1 lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.4 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.4.2 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.5 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.5.0 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.6 -> CurrentJDK drwxr-xr-x 9 root wheel 306 Nov 16 10:44 A lrwxr-xr-x 1 root wheel 1 Sep 7 17:07 Current -> A lrwxr-xr-x 1 root wheel 59 Sep 7 17:07 CurrentJDK -> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents Everything looks normal so far... me$ ls -la /System/Library/Java/JavaVirtualMachines/ total 0 drwxr-xr-x 2 root wheel 68 Nov 16 10:44 . drwxr-xr-x 5 root wheel 170 Nov 16 10:44 .. Apparently, my virtual machines have been deleted or moved? I'll probably be able to just re-install Java, but does anyone have any insight into why this may have happened or how to prevent in the future?

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  • Stop jucheck from running

    - by Ken
    I've installed Java on Windows Vista, and every day I get a Vista security warning asking me if I want to run "jucheck". Apparently this is the Java automatic updater. Well, I don't want it to run on its own, ever. I cancel it, and quit it. I right-click on the taskbar and unclick "Check for Updates Automatically", and then click "Never Check", and "Apply". And yet, it never remembers this setting. If I come back to the "Java Control Panel" right after clicking "OK", the very same box is checked again, all on its own. Is there some way to kill jucheck once and for all? If I simply delete jucheck.exe, will Java (other than the automatic check) still work, and will manual updates still work, and will it stop even trying to update every morning?

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  • How to make an x.509 certificate from a PEM one?

    - by Ken
    I'm trying to test a script, locally, which involves uploading a file using a Java-based program to a FileZilla FTPES server. For the real thing, there is a real certificate on the FZ server, and the upload step (tested alone) seems to work fine. I've installed FileZilla Server on my dev box (so it'll test uploading from localhost to localhost). I don't have a real certificate for it, of course, so I used the "Generate new certificate..." button in FZ. It works fine from an interactive FTPES program (as long as I OK the unknown cert), but from my Java program it throws a javax.net.ssl.SSLHandshakeException ("unable to find valid certification path to requested target"). So how do I tell Java that this certificate is OK with me? (I know there's a way to change the Java program to accept any certificate, but I don't want to go down that route. I want to test it just as it will happen in production, and I don't want to ignore unknown certificates in production.) I found that Java has a program called "keytool" that seems to be for managing this sort of thing, but it complains that the certificate file that FZ generated is not an "x.509" file. A posting from the FZ side said it was "PEM encoded". I have "openssl" here, which looks like it's perfect for converting between certificate formats, but I think my understanding of certificate formats is wrong because I'm not seeing anything obvious. My knowledge of security certificates is a bit shaky, so if my title is stupidly wrong, please help by fixing that. :-)

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  • Glassfish v3 failure when startup. "Cannot allocate memory "

    - by Shisoft
    It is clear in this Question Fail to start Glassfish 3.1: java.io.IOException: error=12, Cannot allocate memory But in my case,I have a 512M memory Ubuntu 10.04 vps.It seems that I don't need to change any configure.But when start the server,I got this exception VM failed to start: java.io.IOException: Cannot run program "/usr/lib/jvm/java-6-sun-1.6.0.22/bin/java" (in directory "/home/glassfish/glassfish/domains/domain1/config"): java.io.IOException: error=12, Cannot allocate memory So,I set <jvm-options>-Xmx512</jvm-options> to <jvm-options>-Xmx400</jvm-options> The exception remains.What did I do something wrong? result of free -m total used free shared buffers cached Mem: 512 43 468 0 0 0 -/+ buffers/cache: 43 468 Swap: 0 0 0 result of cat /proc/user_beancounters Version: 2.5 uid resource held maxheld barrier limit failcnt 146049: kmemsize 2670652 5385253 51200000 51200000 0 lockedpages 0 8 2048 2048 0 privvmpages 11134 134522 131200 262200 4 shmpages 648 1352 128000 128000 0 dummy 0 0 0 0 0 numproc 12 73 500 500 0 physpages 6519 28162 0 200000000 0 vmguarpages 0 0 512000 512000 0 oomguarpages 6527 28169 512000 512000 0 numtcpsock 4 14 4096 4096 0 numflock 0 5 2048 2048 0 numpty 1 2 32 32 0 numsiginfo 0 3 1024 1024 0 tcpsndbuf 159600 265744 20480000 20480000 0 tcprcvbuf 65536 3590352 20480000 20480000 0 othersockbuf 44232 90640 20480000 20480000 0 dgramrcvbuf 0 12848 10240000 10240000 0 numothersock 22 31 2048 2048 0 dcachesize 0 0 10240000 10240000 0 numfile 1002 1474 50000 50000 0 dummy 0 0 0 0 0 dummy 0 0 0 0 0 dummy 0 0 0 0 0 numiptent 24 24 2048 2048 0 Thanks

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  • log4j-1.2.8.jar gets deleted from the path when a Webservice is created from Eclipse

    - by Seema
    When I try to create a Webservice from Eclipse, the log4j-1.2.8.jar which is configured in the project's build path just gets deleted, and when I try to invoke the Webservice it gives error as below: 2014-06-05 11:47:48,742 ERROR ServiceRequester:55 - RemoteException 2014-06-05 11:47:48,742 ERROR ServiceRequester:56 - ------ AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.generalException faultSubcode: faultString: java.lang.NoClassDefFoundError: org/apache/log4j/Logger; nested ex ception is: java.lang.NoClassDefFoundError: org/apache/log4j/Logger faultActor: faultNode: faultDetail: {http://xml.apache.org/axis/}hostname:INPUSCPC07719 java.lang.NoClassDefFoundError: org/apache/log4j/Logger; nested exception is: java.lang.NoClassDefFoundError: org/apache/log4j/Logger We also tried to place this jar to a different path than where the project is located, but it still delete this jar from that path too. Can anyone help in this?

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  • Top - what does Virtual memory size mean? ...linux/ubuntu

    - by user42159
    I am running Top to monitor my server performance and 2 of my java processes show virtual memory of upto 800MB-1GB. Is that a bad thing? What does virtual memory mean? And oh btw, I have swap of 1GB and it shoes 0% used. So I am confused. Java process = 1 Tomcat server + my own java deamon Server = Ubuntu 9.10 (karmic)

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  • Get SMTP to work

    - by user664408
    We upgraded to exchange 2010 and this broke an old java based script that connected and sent out e-mail messages. Many hours later we still can't get exchange to work like exchange 2003 did. That hope was abandoned and we decided to create a linux postfix server to forward the e-mail from the old system to exchange, eliminating exchange on the java side. This still doesn't work with similar errors. I need help figuring out what is different between exchange 2003 with SSL and authentication and the new servers, both linux and exchange 2010. My guess is both have TLS and for some reason the java code won't revert back to the older version of SSL, instead it just fails. Can someone help me either setup exchange 2010 to work like 2003 used to, OR to setup postfix to mandate it use SSL 2.0 instead of TLS? unfortunately no one knows anything about the Java code and they can't decompile it apparently. Any help is appreciated.

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  • Where can I find MSVM-specific applets?

    - by math
    For a specific project, I need to install and test the (now discontinued) Microsoft Java VM. But now that it is installed, I'm unable to find any applet which still work or require the Microsoft Java VM on the net... Do you know any site where I can access Java applets (or application) which work in this environment?

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  • Java Program Specialization - What is it? I don't understand it..

    - by KP65
    I'm reading about program specialization - specifically java and I don't think I quite understand it to be honest. So far what I understand is that it is a method for optimizing efficiency of programs by constraining parameters or inputs? How is that actually done? Can someone maybe explain to me how it helps, and maybe an example of what it actually does and how its done? Thanks

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  • Is there an iconv with //TRANSLIT equivalent in java?

    - by Keith
    Is there a way to achieve transliteration of characters between charsets in java? something similar to the unix command (or similar php function): iconv -f UTF-8 -t ASCII//TRANSLIT < some_doc.txt > new_doc.txt preferably operating on strings, not having anything to do with files I know you can can change encodings with the String constructor, but that doesn't handle transliteration of characters that aren't in the resulting charset.

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  • How to obtain position in file (byte-position) from java scanner?

    - by september2010
    How to obtain a position in file (byte-position) from the java scanner? Scanner scanner = new Scanner(new File("file")); scanner.useDelimiter("abc"); scanner.hasNext(); String result = scanner.next(); and now: how to get the position of result in file (in bytes)? Using scanner.match().start() is not the answer, because it gives the position within internal buffer.

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