Java is a general-purpose programming language and a computing platform called the Java Virtual Machine (JVM).

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300 views

How do I execute in background / return early?

For reference, I'm using phpseclib to control a remote SSH server using the 'root' account. I have to start/stop a java process which is ran in the background. Stopping works fine with killall java ...
3
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175 views

Flipping Control/Command in GNOME breaks Alt key in JVM

I want to switch Control and Command modifier keys in GNOME / Debian Jessie, because I use a Macintosh laptop. I have managed to get these changed via the TweakTool -> Typing panel, like this: Ctrl ...
3
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253 views

Implement Java/JavaFX on ARM

I am working on ARM Linux. I have found this link that says that JavaFX could work on ARM. I am confused about Embedded Java SE and JavaFx ARM. Do I need to setup a JVM for those or not? I have ...
3
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0answers
390 views

VMO Changes After Adding New RAM To AIX?

We have a server at a client site running AIX 5.3, which we just up the RAM to 32GB, from initially 16GB (if I'm not mistaken). This server is our Application server running J2EE applications on top ...
2
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75 views

Java programs steal focus in X11

I run IntelliJ IDEA & some other Java GUI apps on my linux box. Every one of them tends to steal focus when launching up, and doing it in stealthy way. E.g.: I run IDEA, it starts up in ...
2
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68 views

JVM low-memory tuning

What command-line options would provide the lowest memory-footprint JVM, in OpenJDK, or possibly other JVMs (Linux/Debian)? I'm willing to disable JIT, live with slow or choppy garbage collection, ...
2
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195 views

How can the RES memory reported for a Java process be higher than the VIRT memory?

I've been monitoring a Java process (Oracle Weblogic) using TOP and have observed that sometimes the following will happen: RES will increase from it's usual stable level of 2,097,152 KB up to ...
2
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953 views

Tomcat unable to create file in dir owned by same group

I have a server running Tomcat, and I need Tomcat to create a file in a particular folder. Tomcat (technically a Java app) runs as the user 'tomcat', as evidenced by top: #top 1251 tomcat 20 0 ...
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495 views

Java plugin not working with FireFox 24.3.0 on Red Hat Enterprise Linux 5.10

In the about:plugin tab, there is not Java plugin. I have created the symbolic link as suggested. The output of the 'ls -al' command is: lrwxrwxrwx 1 shehab shehab 58 Jun 4 11:21 libnpjp2.so -> ...
2
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330 views

Installing jdk 1.4.2 on fedora 14

I am trying to install wsdgate, In the installation they have recommended to use jdk 1.4.2, I already have jdk 1.7 but I am not able to install JDK 1.4.2 on fedora 14. I got error like this could not ...
2
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512 views

can't open netbeans IDE in Fedora 17

my linux version is: Fedora 17 I installed Netbeans IDE 7.1.2 and it was working fine, but now, when I try to open it, nothing happens after double clicking on it. I think updating the kernel may be ...
2
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187 views

Any way for Unix to ignore lpoptions and let Java do it's job?

I'm using the javax.print API to print a Jasper Report on Debian Linux. For some reason the saved lpoptions (CUPS settings) always override settings chosen on the Java Print dialog. At this point the ...
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66 views

Java Process hangs with .exec and ssh

EDIT: I believe the issue is that the ssh connection is creating background connections that are still open (cf. http://superuser.com/a/617670). I would run ssh with the -f flag, but I need to be sure ...
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0answers
20 views

Java screen session starting

I am trying to launch a sh file wich starts a screen Session, but nothing happens. When I try to launch it manually it works fine. su minecraft -c "screen -S $1 -d -m sh start2.sh $2" and in the ...
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20 views

the case of the missing /usr/bin/jexec

I was upgrading a package when I came across the following - $ sudo aptitude install openjdk-9-jre=9~b87-1 openjdk-9-jre-headless=9~b87-1 -y The following packages will be upgraded: openjdk-9-jre ...
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0answers
92 views

Java related error met when installing COMSOL

I would like to install a software called COMSOL on Redhat (Red Hat Enterprise Linux Server release 6.4 (Santiago)) cluster. COMSOL is designed as a Windows software, and its installation requires X ...
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31 views

Is it possible to create aliases that affect services starting?

Currently I have a custom service that executes java in multiple places. I want to be able to add an option to any executions of java this service will spawn (I'm specifying the error log location, ...
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27 views

Help with java on Fedora

I have installed java on my fedora, because when I execute java -version I get: openjdk version "1.8.0_25" OpenJDK Runtime Environment (build 1.8.0_25-b18) OpenJDK 64-Bit Server VM (build 25.25-b02, ...
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44 views

after reboot server, service start without special chars

I write simple Java server. This service (java server) connect with mySQL database. I am connecting with this service by socket connection. Everything work well when i start my service by line ...
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273 views

Java process gets killed frequently by OOM - Killer on upgraded hardware

I am running solr on an Ubuntu server along with 4 other java processes. Current index size is 30 GB. My solr process gets killed frequently in few hours. It clearly mentions that its an OOM killer. I ...
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263 views

java version not found in redhat

My OS is redhat linux. It's having the default java 1.4.2, but I need java 1.7.45, for that I am trying as follows: /usr/sbin/alternatives --install /usr/bin/java java /u01/java7/bin/java 5 ...
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46 views

How to make aptitude recognize Oracle Java as a valid java dependancy

I have Oracle Java 7 on my Debian. I want to install tomcat server using aptitude, but it keeps trying to install icedtea, and unnecessary java related packages, is it possible for aptitude to know ...
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23 views

Solaris JRE Mozilla

In an thin client setup where Solaris 10 is being used on client and server side. Java based web apps are opened in Mozilla web browser 1.7. JRE version 1.4.2.6 is installed for Mozilla. On a few ...
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281 views

Measuring context switches of a LWP gives incorrect results. Why?

I have a Java thread pinned at my cpu core. It is busy spinning and I see through top that it is running fine: %Cpu0 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu1 : ...
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270 views

JVM memory limit on Linux (Debian)

When running my java program, I get following error: Exception in thread "main" java.lang.OutOfMemoryError: Requested array size exceeds VM limit I am wondering how I can increase the limits on my ...
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347 views

X high CPU when using Java applications

Only recently, my Freemind program has become extremely sluggish and unresponsive (big lag) when moving my mind map around. I use Arch Linux with xfce4. Freemind is made with Java. If I move the mind ...
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203 views

Ant error after installing NetBeans 7.3 in Lubuntu

I have NetBeans 7.01 from Debian repository - all works. But I have a problem with NetBeans 7.3 from the official site (installed on the same machine) - I can't compile anything: ERROR - Ant is ...
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247 views

Rogue Java process brings my computer to a halt

In reference to my earlier post: Is there a log of past threads that are now closed? I gave the process a kill -STOP signal and started examining the details. I can't seem to figure out why it is ...
0
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17 views

Unable to load shared libraries in java

I have copied existing java to differentlocation and applied setcap on it. #setcap cap_net_bind_service=-epi /usr/lib/jvm/jre-1.7.0-openjdk.x86_64_test/bin/java Now, i got the below error and one ...
0
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23 views

the problem when install Cytoscape on Opensuse 42.1

I want to install Cytoscape on my computer. I download the installation file from Cytoscape official site and I install it like this sudo sh Cytoscape_3_3_0_unix.sh but I get the wrong message ...
0
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6 views

Amazon Linux 2015.09 + JRE 1.4?

I need JRE 1.4.2 for a script that calls several jars, which needs to run on an Amazon Linux 2015.09 server. How can I install that?
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50 views

NetBeans IDE - Warning

I'm using Linux Mint 17.3. I installed NetBeans on it and whenever I open the Netbeans App, I receive this warning message: The package containing the class javax.swing.JComponentBeanInfo was ...
0
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0answers
128 views

Install Java 8 on ARM Nas (Debian Wheezy)

I need Java 8 on my NAS (Arm7, 32bits, Debian Wheezy) for fim software. uname -a Linux ReadyNAS 3.0.101.RN_ARM.3 #1 Mon Dec 15 23:39:16 PST 2014 armv7l GNU/Linux I tried the packages way : sh ...
0
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0answers
25 views

Build fails as the Java not recognized (Amazon EC2)

My java path is set in .bashrc and we had to run source ~./bashrc when we run the build or the build fails saying java is not recognized . Any solution for this with out running the source bashrc ...
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35 views

Dealing with broken pipes in ssh X11 forwarding with an intensive numerical simulation

I have a hydrodynamic code I inherited that has a java gui. It is quite user friendly but it is a nightmare to run through ssh because when I do X11 forwarding, if the connection experiences problems ...
0
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39 views

Java process seems to always be bound to a single CPU

This is a bit of a puzzler. I have 28 VMs, running on ESXi 5.5, each with 6 vcpus assigned to them. They're not particularly loaded, and they're not running anything other than a single java process ...
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150 views

JAVA_HOME set to /usr/lib/jvm/jdk1.8.0_60, yet when running java it does not work?

I needed to set JAVA_HOME and DATABASE_HOME to install Adempiere, so I did it by editing .bashrc as shown here, and then restarting virtual machine. [Linux version is Ubuntu 14.04.3]. When I run ...
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13 views

OpenDaylight and Java flavour

This is my first time installing OpenDaylight, and I never dealt with Java before. I'd like to understand what flavour of Java is required for the correct operation of OpenDaylight -- OpenJDK or ...
0
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0answers
59 views

Check OpenSSL version in Android with java runtime or shell command

I have a problem with checking OpenSSL version in Android device. I've tried to: grep OpenSSL from system/lib/libssl.so with java runtime.exec. but it doesn't work? Anyone can help me, how to make a ...
0
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0answers
101 views

Why java and java based apps work fine when JAVA_HOME and PATH variables are not set?

I installed jdk8-openjdk in Arch Linux using official repositories. Actually it works fine even before JAVA_HOME and PATH environment variables are not set. javac print the usual output. also java ...
0
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0answers
121 views

Cannot install NetBeans 8 in Ubuntu 14

I am trying to install NetBeans 8 in Ubuntu 14. When I execute the .sh file using ( I have already set the file as executable ) ./netbeans-8.0.2-linux.sh I get this ( Out of memory error ) I ...
0
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0answers
23 views

Interrupted OpenCV building

I was following a tutorial on building opencv for java, but accidentally I interrupted it. Now everytime i want to run the same command to build it, it throws this error: CMake Error at ...
0
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0answers
46 views

Linux capabilities for java to resolve symbolic links

I run a java program by a non-root user. The program has to resolve a symlink to the real file name, but the link is owned by a different non-root user. I used setcap to set capabilities to open ...
0
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72 views

Too many “ESTABLISHED” connection

I have a setup where my client talks to the server via CORBA connection. Both client and server runs on different machines. When I start my client a connection is "ESTABLISHED" with the server. Once ...
0
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0answers
49 views

Focus stealing under Xfce in Matlab (Java programs?)

I'm using Matlab R2015a under Debian Linux. I recently switched to Xfce 4.12 as my desktop environment, and since then I am experiencing weird focus behavior: When I try to interact with the ...
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78 views

XFCE strange behaviour on Java applications

I recently moved to XFCE 3.12 on my laptop and everything is working great except for a strange behaviour in Eclipse and other Java applications. When expanding a line selection with Shift+Up or Down ...
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19 views

OS X Java Security Edit Site List En Masse

I'm sure, like many other systems administrators like myself who use Mac, you've come across the dreaded Java Security site list and the need to add IP's for individual blades, servers and anything ...
0
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125 views

installing java on cent os 6.6 64 bit system

am trying to follow this link: How to Install JAVA 7 (JDK 7u79) on CentOS/RHEL 7/6/5 and Fedora So I downloaded the jdk tar and untarred it.However when I run java -version from within bin I get the ...
0
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45 views

Remove or decrease JAVA Security openjdk AWS centos instance

How to decrease or remove java security level in CentOS openjdk? I tried removing the java security level but I didn't find any option, my OS is in an ec2 aws machine.
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98 views

What font settings would Java Applications Use without Fontconfig?

I have a java application that looks fine without fontconfig installed, however, I need fontconfig as a dependency for a package, and when I install it my java app's fonts change drastically. My goal ...