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

learn more… | top users | synonyms

-1
votes
2answers
271 views

wheezy maven install

I have wheezy installed from a pen drive. Updated things and thought I had got maven and eclipse. But maven projects would not compile. I uninstalled all the maven programs I could find in Add/remove ...
2
votes
1answer
3k views

How to set Oracle Java's JAVA_HOME in Fedora 19

I just installed Fedora 19 and managed to get FedoraUtils installed. So I chose java oracle. after installation I could see in the FedoraUtils list that oracle java (installed) but I can't see the ...
2
votes
2answers
124 views

Change PATH in Debian 7.1.0 for JAVA

I would like to change the PATH of my Debian 7.1.0 system to link the java version I want. If I insert into the terminal: java -version I get: java version "1.6.0_27" OpenJDK Runtime Environment ...
1
vote
2answers
279 views

Hugepages in linux - how to make sure that java process will start using hugepages

I'm running java server on Red Hat Enterprise Linux Server release 5.9. Recently I started to use HugePages as it has some advantages I would like to use. System was configured correctly (as many ...
3
votes
1answer
1k views

How to get Oracle java 7 to work with setcap cap_net_bind_service+ep

I am trying to grant the java executable the right to open ports below 1024 on Linux. Here is the setup /home/test/java contains the Oracle Server JRE 7.0.25 CentOS 6.4 Here is what getcap ...
1
vote
2answers
3k views

install java sdk 6, wheezy

Followed debian Java Sun wiki, and later 1[open jsk 7 ]2 which has a note on installing 6 : link to java 7 on debian aptitude install sun-java6-jdk No candidate version found for ...
0
votes
0answers
55 views

Eclipse : GLib-ERROR

I have an JAVA application which includes .so file.I have included the VM argument path in the Run configuration -Djava.library.path="${workspace_loc}/JlibFprint/resources:${env_var:PATH}" But when ...
3
votes
2answers
95 views

How to make apt recognize an installed tar package?

I've installed Oracle Java. I want to be able to remove OpenJDK, but when trying to do so apt wants to install another version of Java. How can I configure apt so that it knows I already have a ...
0
votes
0answers
27 views

hadoop namenode host login issue

hduser1@bycb4y1:/$ ssh -p 9000 hadoop-namenode Welcome to Ubuntu 12.04.2 LTS (GNU/Linux 3.5.0-23-generic x86_64) * Documentation: https://help.ubuntu.com/ Last login: Mon Aug 5 17:05:47 2013 from ...
7
votes
1answer
998 views

What is the safe way to allow Java 7 to run on SELinux

Short version: What is the most secure way to allow Java 7 to run on (with?) SELinux? Long version: Sorry in advance if I use incorrect terminology. I'm really just a Java developer with a meager ...
2
votes
1answer
104 views

Autocomplete doesn't work for file parameters to jarsigner

I'm using Lubuntu 12.10. Assume I've got a file called test.apk in my current folder. 1.) In LXTerminal/bash if I type, adb install t<TAB> the terminal autocompletes it correctly to ...
2
votes
2answers
303 views

Problem downloading Java JDK with WGET on Ubuntu

I'm attempting to install the Java JDK through the command line using WGET on ubuntu (no desktop). Here is the picture I took. The file that was downloaded was not the tar ball of the JDK: How can I ...
0
votes
0answers
187 views

Jitsi crashes sound every time

No matter which version of the software I download and install from jitsi.org, running Jitsi causes the sound on my OpenSUSE 12.3 machine to be replaced by a low hissing noise. This persists even if I ...
2
votes
2answers
2k views

Find the process id of a java application in a bash script (to see if the target application is already running)

I know there are a million questions on getting the process ID, but this one seems to be unique. Google has not given me the answer, so I hope stackexhange will help rather than close this question. ...
0
votes
1answer
149 views

Init script partially launches java app

I have a java application that I manage to execute by hand. The application normally opens several ports for local communications (7180 => 7183). Port 7182 serves as a web console and allows me to ...
0
votes
0answers
43 views

High Availability of Services

I want to monitor a couple of services in linux. In case they go down I want to restart them. I'm writing a crontab which will get the name of the services using jps command every 60 seconds, and if ...
0
votes
1answer
90 views

TCLBLEND FAILURE - Centos 6.4

I have been trying to use a home grown test tool and after doing an update to Centos 6.4, I am no longer able to run the tcl based tool. I am getting the following error and I have no internet access ...
2
votes
1answer
60 views

Can connect from RPi to laptop, but not other way around

I'm developing a server-client application (command-line based) in Java. I want to run it on my Raspberry Pi (RPi), but it turns out I can't login to my server-part from my laptop. The problem is that ...
0
votes
0answers
169 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 ...
0
votes
1answer
1k views

Alternatives not working well for Java installation on Centos 6.4

I am trying to installing on Centos java from Oracle. Following are my steps. yum install /usr/local/jdk-7u3-linux-x64.rpm alternatives --install /usr/bin/java java /usr/java/latest/jre/bin/java ...
0
votes
1answer
156 views

Red5 can't find JAVA_HOME

I'm setting up a Red5 server on Cygwin I get this /usr/share/red5$ sh red5.sh Running on CYGWIN_NT-6.1-WOW64 Unable to locate Java. Please set JAVA_HOME environment variable. However, I can also ...
0
votes
1answer
777 views

Java installation having issues on Centos java and javac showing different version

I have this package of java jdk-7u3-linux-x64.rpm. So I have been doing this normally yum install jdk-7u3-linux-x64.rpm. Then immediately I will do this alternatives --install /usr/bin/java java ...
2
votes
2answers
298 views

Search class names in jars

I'm using this command to search *.jar files for java classes, and I only get the name of the jars that contain those classes: grep -ral --include=*.jar SignonEJB . How can I also get the class ...
1
vote
1answer
257 views

Java application locks up after playing sound

Our Java application plays short notification sounds periodically (in response to user actions). On some hardward, our application will lock up after the 3rd or 4th short sound. We have to pkill java ...
0
votes
1answer
914 views

Can't load IA 32-bit .so on a IA 32-bit platform

I'm trying to install an 32_bit_application on CentOS (64-bit), while running the setup.bin file it return the following error Invocation of this Java Application has caused an ...
-2
votes
1answer
67 views

Novice Ubuntu 12.04 user needs help! [closed]

I'm new to Unix/Linux and someone suggested I try Ubuntu. I like it but I can't figure a couple of things out and don't really have time to google up ways to solve the problem. Answers from a quick ...
2
votes
4answers
96 views

any feature on linux like Perfermance Counter on Windows servers?

I have a tomcat web application, when invoking an unstable remote API, I want to get realtime http request time at any time. On windows server, I can use Performance Counter, does centos provide ...
4
votes
3answers
792 views

Uniquely identifying java processes with same name

I have two java processes which run using the same file name, MyApp.jar (for example). /usr/java/latest/bin/java -jar MyApp.jar These jars exist in different places and use different ...
1
vote
3answers
625 views

Linux / JVM - OutOfMemoryError: unable to create new native thread

I have a memory problem with a Linux server (CentOS). It is a VM. Below is the context. It has 70Gb of RAM. There are 2 tomcat running on it. One tomcat is given a heap of 13Gb and the other one a ...
0
votes
0answers
84 views

Prevent Java to escalate CPU usage on Slackware64?

I use Slackware64-current on my work laptop and though I love running Slackware, sometimes it hangs on me near to the point of starting considering falling back to Windows. I develop on Java and use ...
2
votes
1answer
698 views

Minimal Java installation for Linux with no GUI

I'm working on a CentOS 6.3 x86_64 minimal OS (installed using the netinstall ISO). This system is not expected to run anything beyond console apps/services and Tomcat7. When I attempt to install ...
3
votes
0answers
109 views

RES memory more than initial and maximum memory for java

We have a java application running on Centos 6.4 what we notice is that the RES is around 370m which is more then the allocated max that is 256m. Does this signify that we the application is leaking? ...
1
vote
0answers
141 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 ...
2
votes
2answers
145 views

Do I need to remove all “java|jre” packages from my system to be secure from java vulnerabilities?

Currently I have these installed on my Scientific Linux 6.3: [root@localhost ~]# rpm -qa | egrep -i 'java|jre' java-1.7.0-openjdk-1.7.0.9-2.3.7.1.el6_3.x86_64 ...
1
vote
3answers
5k views

Kill only one Java process

I usually run few Java applications, one for server running locally and other for some IDE like NetBeans. And from time to time, after lots of redeployments, my server get stuck on ...
1
vote
1answer
147 views

Point IP to an application instance

I was just wondering how I go about pointing a static IP address which I have purchased to an application instance on my server, using a different IP from the one I currently have pointing to my main ...
2
votes
1answer
444 views

IBM Java Runtime Environment on CentOS

I need to install IBM's JRE, but I can't seem to find an appropriate download or guide to installing it on CentOS. I've found various zips, but none of them include an RPM and I have no idea where to ...
1
vote
1answer
6k views

Missing 32 bit library on a 64 bit Linux install

I am trying to figure out why Eclipse is complaining about being unable to find a library. I've managed to reproduce/reduce the java problem to: $ ldd ...
3
votes
1answer
560 views

update-alternatives just for one user

I'm using a shared server. On that server different versions of Java are installed: Selection Path Priority Status ...
3
votes
1answer
1k views

Cannot kill a java process

I have a java process that cannot be killed. I have tried every method I know, or that I have found on the internet to no avail. I have tried: killall java kill -9 <pid> kill -11 <pid> ...
1
vote
4answers
9k views

Java update on Centos

I have a Centos 6.2 machine. It currently has JDK 1.6.0_26 installed. I would like to update that to 1.6.0_38, the current release version. I saw a comment somewhere about sudo apt-get; apt-get does ...
3
votes
2answers
707 views

What is meant by stack in connection to a process?

From the book Advanced programming in the Unix environment I read the following line regarding threads in Unix like systems All the threads within a process share the same address space, file ...
3
votes
4answers
9k views

Installing JDK 7 on debian

So I just rented a dedicated server running Debian, and I know nothing about Linux. Anyway, I want to install the JDK 7, first I connected through SSH and granted myself administrator rights by ...
2
votes
0answers
373 views

Java uses max 8 cores on Debian, even though 16 are available [closed]

I have two servers at hand, both with 16 cores. The first is running Debian, the second running Ubuntu. I have written a small multithreaded java app that creates 16 threads. On the Debian machine, ...
0
votes
0answers
458 views

Java SWT App: Need 64-bit swt.jar

I have a Java app that I want to run in Ubuntu, but I have Java 64 so I can't run it because it only has the 32-bit swt.jar. I can't build it myself, so Is there anyone that can provide the 64-bit ...
1
vote
1answer
153 views

Visually-transparent & Input-transparent Windows

I'm a Java programmer who's rather new to Linux. I'm on Suse / Gnome and I need to create a window which: Is visually translucent/transparent. This is the usual alpha blending that composes a ...
8
votes
3answers
3k views

How to trace a java-program?

As a sysadmin I sometimes face situations, where a program behaves abnormally, while not creating errors at all or creating nonsense error-messages. In the past - before java came in - there were two ...
3
votes
0answers
156 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 ...
5
votes
1answer
2k views

Use certain version of JRE / JDK for certain programs

I use ArchLinux, and an IDE called PyCharm. On its download page, it recommends using Java 6 instead of OpenJDK. ArchLinux has an OpenJDK package (jdk7-openjdk) that I have installed, installed, and ...
1
vote
1answer
290 views

How to start java application after machine reboot?

I'm wondering if there is easier way to start java application (just tomcat server) after machine has been rebooted? Possible answers: Add the application as a service and then add it using ...