0
votes
0answers
18 views

Preferred “Chef/Berkshelf/Vagrant” Way to Change Java Versions

On a Linux box, what's the preferred, best-practice way of switching Java versions? For example - let's say that I want to build & test out my app on Java 7, and then Java 6. Here's a few ...
0
votes
0answers
29 views

How to enable kerberos authentication to a Java web app

I'm currently using Centrify to aid with Kerberos/AD integration in our environment. Right now we have Kerberos enabled on a Centrified version of Apache. We are trying to run jnlp files through ...
0
votes
0answers
25 views

new relic are able to show server data but not application data

I had managed to install newrelic and the data are showing up at the "Servers" tab. However it showing "This server isn't hosting any apps that report to New Relic" at the App section. I had put a ...
0
votes
2answers
71 views

Installing a minimal java on Ubuntu VM

I don't have java installed on a Ubuntu virtual machine (just server, no X11): bash: java: command not found I want to install a minimal version to run some scripts. When I issue: sudo apt-get ...
0
votes
1answer
11 views

Tomcat 7.0.42 Manager Weird behavior

Good morning folks! I'm playing with my brand new tomcat installation today, and everything run pretty smoothly except that I got a weird reaction using the manager with virtualhosts. The problem ...
1
vote
1answer
52 views

Load Balancer on Amazon does not have secure flag set for Cookie

We have a java based application running on Amazon and have configured our Amazon ELB to connect to them successfully. However, we are seeing that the Cookie flag not set as Secure. Name Value ...
0
votes
0answers
42 views

Background process and read from /dev/pts/X

I tested it on Ubuntu 12.04. First, I run java process from user1 in background and close terminal. Then I open a new terminal (from user1) run special script that sends current tty name (/dev/pts/2) ...
0
votes
1answer
109 views

Cannot start cassandra: numactl: execution in CentOS 6

I trying to install Datastax Apache Cassandra with OpenJDK # java -version java version "1.7.0_51" OpenJDK Runtime Environment (rhel-2.4.4.1.el6_5-x86_64 u51-b02) OpenJDK 64-Bit Server VM (build ...
0
votes
1answer
96 views

change java process name

I am trying to change a java process name using the start-stop-daemon. When running the process without the daemon I simply add to the script: "exec -a kuku" And the java process name in the proc file ...
1
vote
0answers
70 views

Preventing Linux Kernel from killing a Java process prematurely

Running Ubuntu 12.04.3 LTS with 32 cores 244GB. Its the Amazon EC2 memory instance the big one and Java 1.7u25 My java process is running with -Xmx226g I'm trying to create a really large local ...
0
votes
0answers
39 views

top output seems fine, yet server is overloaded

This server I am benchmarking gives no obvious signs of getting overloaded at a first glance. top output: top - 22:48:25 up 5 days, 3:41, 3 users, load average: 3.19, 3.34, 3.25 Tasks: 146 total, ...
0
votes
1answer
41 views

JVM dying with no error, no OOM in kern.log

My JVM sometimes, but not always, dies on startup with no error in any application or system log file. There is nothing in /var/log/kern.log, nothing relevant in dmesg. The thing is, even when I use ...
1
vote
1answer
114 views

Access secured windows folder with java on a linux server

We're trying to mount a secured windows share on a linux server, but until now we're unable to do so. This is the setup we're having: A linux server that runs a java application A windows share that ...
0
votes
0answers
39 views

Controlling Apache Tika with Supervisord

I am using TikaJAXRS on my server to process files, a part of Apache Tika project. I made a service wrapper to run it. So normally, I run it with service tikaserver start. But basically, the command ...
0
votes
1answer
267 views

permission denied to start tomcat as root

I just started using CentOS. I install Java yum install java-1.7.0-openjdk-devel Added a user: $useradd supersite Downloaded tomcat: $wget ...
0
votes
4answers
78 views

Upgrade to latest tomcat/ JRE or stick with what's provided by LTS?

Running a server with Ubuntu 12.04 which ships Tomcat 7.0.26. Should I care about updating the tomcat installation to latest 7.0.42 version or should I stick with what's provided? If I stick then am I ...
1
vote
1answer
89 views

How does it harm if I install JDK on my ubuntu server when JRE is just enough for me?

I just need JRE for my programs. But how does it harm if I use JDK when JRE is enough for my webserver? Does it only mean more harddisk space for JDK & except for that, no other waste? I use ...
1
vote
1answer
114 views

Reasons for a TCP Timeout scenario

I am actually currently investigating long running connections of a Java/Tomcat based Web application. After ruling out any internal or application based reasons, I am now down to the network layer. ...
0
votes
0answers
250 views

Tomcat6 does not start correctly when specifying jdk5

I have installed tomcat6 on debian 7 using apt-get install tomcat6 tomcat6-admin. It also installed java6. The tomcat service starts up just fine and I can also restart it: root@dd:/home/user# ...
1
vote
2answers
2k views

Does kill -3 actually terminate a java process? Or just generate a thread dump?

CentOS 5.9 If I run kill -3 <java process pid> what actually happens? As per this red hat article, I understand that a Java Thread Dump is generated but is the process terminated? It doesn't ...
0
votes
1answer
24 views

Tomcat 6 path issue on Linux Debian

I'm facing an anoying issue on Linux/Debian Tomcat configuration: I've set up path variables, but when I try to start or shutdown Tomcat nothing happens. Log is empty and the following appears: ...
1
vote
0answers
54 views

Does chpst honour ulimit settings?

We are currently experiencing issues with a JBoss-based server on a linux platform - effectively, we are running out of available file-handles within the process, and the server croaks. We have set ...
0
votes
1answer
34 views

How to set multiple paths with update-alternatives

For example, the following command install java to /usr/bin/java update-alternatives --install /usr/bin/java java /opt/java7/bin/java 1 && update-alternatives --set java /opt/java7/bin/java ...
0
votes
0answers
226 views

authenticating mongodb from a remote machine with ssh tunnelling

I have mongo db running in a remote server (debian) with authentication on. I need to connect to it with UMongo (UI tool for mongodb) from my local machine (windows) to visualize the data. I have not ...
-1
votes
1answer
123 views

Tomcat - How to stop, start, restart

I installed Tomcat7 from source on a debain. However, based on the information online I should be able to start and stop the service using the following command: service tomcat7 stop/start However ...
2
votes
1answer
93 views

Specify a different location to install Java - RHEL6

Is there a way to specify the location where all the installed files would go when installing Java JDK on red hat linux 6? Currently when I follow the steps mentioned in Installation Guide, it ...
0
votes
1answer
82 views

Bind a Java process to a virtual interface

I'm trying to bind a java process to a specific virtual interface having IP address <myIFaddr> as follows: export BIND_ADDR=<myIFaddr> LD_PRELOAD=./bind.so exec java -jar ppp.jar The ...
0
votes
2answers
58 views

Kerberos with active directory from linux

I have windows stations and a linux server - and I would like to perform SSO using Windows-Kerberos (via Active Directory - the same one all users on the windows station use). And so - I have ...
0
votes
1answer
118 views

Is auto-restarting services (like tomcat) a good idea?

Are there any reasons to not auto-restart tomcat in the case of a crash? It seems like a no-brainer to restart the process, especially in production, if that can mean less downtime due to a crash, but ...
0
votes
2answers
51 views

Managing security (Java) access in a shared environment

While developing a shared hosting solution for Java applications we have encountered an issue, since users can upload their own jars how do we restrict them from running Linux commands such as df -h ...
0
votes
1answer
192 views

Find Java install on CentOS Linux

I have new install of Centos 6.4 x64, it comes with openjdk 1.7.09. Obviously there are exploits/vulnerabilities in that version. The new version is 1.7.17, I try to install install it, and I don't ...
6
votes
2answers
302 views

SSH unresponsive after stopping Tomcat, many ksoftirqd CPU usage

I have a weird issue. Every time I stop Tomcat, SSH becomes very slow, almost totally unresponsive. It takes a minute or even more for SSH to accept any command. When I finally get Tomcat started ...
2
votes
1answer
72 views

Why would disk reads be heavier than writes with a simple java app that creates many small files?

I've got a very simple java 7 app that reads from a proprietary file format (Hadoop sequencefile) sitting on disk xvdb and creates millions of 2-20kb files on disk xvdf. ByteBuffer byteBuffer = ...
0
votes
2answers
644 views

Connection Refused Error Java/Linux

I'm trying to move an existing project over to a new (linux) server environment (note, I have no direct access to the code nor do I have any knowledge about the project in general - talk about a great ...
1
vote
1answer
226 views

How to find out what files are open? [duplicate]

lsof -n contains thousands of entries like this: COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME java 27181 root 5044u FIFO 0,8 ...
0
votes
0answers
300 views

java crashes with Illegal memory access. [54]

I'm using java on OEL 5.8 and it crashes in some applications with "Illegal memory access. [54] error". It occurs with 3 different java installations. 2 of them are Jrockit versions ...
0
votes
2answers
77 views

Java Setup on Scientific Linux showing two diffent versions

Java Setup on Scientific Linux showing two diffent versions. I am trying to get java setup right on Scientific Linux. If I do a javac -version I get the following: java_1.7.0_10 which is the ...
9
votes
5answers
565 views

How do I find the cause for a huge difference in performance between two identical Ubuntu servers?

I am running two Dell R410 servers in the same rack of a data center (behind a load balancer). Both have the same hardware configuration, run Ubuntu 10.4, have the same packages installed and run the ...
0
votes
2answers
215 views

Why does the java -Xmx not working? [duplicate]

Possible Duplicate: Linux out of memory on VPS In my Ubuntu 11.10 VPS, Before I run the jar file: # free -m total used free shared buffers cached Mem: ...
2
votes
3answers
884 views

CPU/JVM/JBoss 7 slows down over time

I'm experiencing performance slow down on JBoss 7.1.1 Final. I wrote simple program that demostrates this behavior. I generate an array of 100,000 of random integers and run bubble sort on it. ...
2
votes
1answer
1k views

Updating and deleting java (red hat / centos) (closed)

I am a total noob with linux. So please explain clearly if you have a solution for me. I have an VPS and I want to update JAVA. I found a guide on the Java site which says: rpm -e < package_name > ...
2
votes
1answer
1k views

Running 32-bit installer on 64-bit CentOS

I am trying to run the installer for a particular piece of software (I probably shouldn't name the application in case the software vendor gets upset over what I am about to say) on a fresh ...
1
vote
2answers
479 views

Linux out of memory on VPS

On my VPS (CentOS) 4GB ram (2 + 2 dynamically assigned when needed) and i have tomcat running with following options JAVA_OPTS="-Xms256m -Xmx2048m -XX:MaxPermSize=256m". Now when i try to start ...
2
votes
1answer
106 views

Time jumps on guest system really shortly

I've got a ESXI-Server and a OpenSuse 10.3 distribution running on it as a guest system. In a java (6_17) application that uses Thread.sleep() to not hog 100% CPU, I noticed that it sometimes never ...
0
votes
1answer
3k views

Java “Could not reserve enough space for object heap” but lots of RAM free

I have a problem running Java applications on a server. root@dobby [/opt]# jdk1.7.0_09/jre/bin/java -version Error occurred during initialization of VM Could not reserve enough space for object heap ...
1
vote
0answers
161 views

java task blocked for more than 120 seconds inet6_ioctl

My server is running Linux kernel 2.6.18-194.el5PAE. And find the following messages sometimes. Any suggestion, what could be the reason? Thanks a lot. task java:8028 blocked for more than 120 ...
0
votes
0answers
89 views

Java won't install

# rpm -ivh jre-7u6-linux-x64.rpm Preparing... ########################################### [100%] package jre-1.7.0_06-fcs.x86_64 is already installed But I also get: # rpm -e ...
0
votes
1answer
359 views

Install .war File on Tomcat, get 503 Error

I'm trying to install "YouTrack" on an ArchLinux box with Apache & Tomcat. I'm totally new to Tomcat though and I'm getting a "503 Service Temporarily Unavailable" error. I installed Tomcat7 via ...
1
vote
2answers
571 views

Installing jdk7u7 on Centos5.8

I'm trying to install Java SDK (jdk-7u7-linux-i586.rpm) on Linux CentosOS 5.8. Im using this guide, and downloading everything from the Oracle website. When executing rpm -Uvh ...
0
votes
2answers
537 views

Open ports for Apache Tomcat-7.0.32 on Linux Mandriva

I installed Apache Tomcat-7.0.32 on Linux Mandriva and I want to make it accessible. for this I need to open ports in iptables. I added the following rules- iptables -A INPUT -p tcp -m tcp --dport ...