Programming language and runtime environment that allows compiled Java programs to run unchanged on most hardware and software platforms

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2
votes
1answer
834 views

Java: Limit the number of cores a JVM can use

Multiple users are running java applications on a 60-core compute server (Linux/Ubuntu-based). There are different applications and most of them are not developed in-house. While the sysadmin thinks ...
0
votes
1answer
603 views

UnknownHostException when enabling JMX in Java 8

Using Java 7, I can launch a JVM with JMX enabled without any problems using these properties: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote....
2
votes
0answers
225 views

Generation of Tomcat Stdout and Stderr log files

Is there a way to catch tomcat stdout and tomcat stderr log files it to log4j or any other way so that i can keep track daily basis.These files are only generated when we restart tomcat.And i want ...
0
votes
2answers
783 views

how verify that weblogic is up to date

How can I verify that Oracle Weblogic is up to date ? The administration console print 10.3.6.0 as weblogic version. I visited Oracle site and the last version to download is 10.3.6 but I think that ...
0
votes
0answers
118 views

Is this a Windows 7 Bug Caused by the Computer's IP in the Hosts File?

Our lab uses several ruggedized military laptops in a closed-network business environment. These computers are running identical Windows 7 versions, networked with static IP's, running Apache Tomcat ...
-1
votes
1answer
533 views

Installing Java 32bit rpm on 64bit CentOS

Downloaded the - jre-8u45-linux-i586.rpm Opened console - su mkdir /usr/bin/java [No java was installed before] cd /usr/bin/java rpm -ivh jre-8u45-linux-i586.rpm [Tried installing] error: ...
0
votes
0answers
39 views

Sending XML Response When Maxed Allowed Connections Reached to Servlet

I have a requirement to limit the number of incoming connections, and if another connection is initiated as the limit is reached to send an XML response. This is for JBoss EAP 6, but a general ...
1
vote
1answer
352 views

How much memory must be left to the OS with a java server application? [closed]

Suppose I am running tomcat with -Xms256m -Xmx1024m, but would like to increase my heap usage. What is the largest safe heap size I can allocate? For the purpose of this question, please assume, ...
1
vote
1answer
1k views

What is the order of deployment in Wildfly?

I have a large number of services, and a core set of services that are expected to load first so that they are available when the other services load. Does Wildfly have a specific order (e.g. ...
0
votes
0answers
2k views

Tomcat hangs at “Deploying web application directory…”

I am trying to setup Tomcat application server in an Ubuntu server. When I am trying to start tomcat server it hangs at deployment stage. If I try http://localhost:8080, its taking infinity time to ...
0
votes
1answer
422 views

RESTful client communicating with Freeradius server [closed]

I have successfully installed the Freeradius server on Ubuntu 14.04. It is up and running perfectly with local client(from the source code downloaded from freeradius site). Now my next task is to have ...
0
votes
1answer
136 views

Chef / Vagrant - Kitchen cant connect to Update Jenkins

Iam getting crazy with Chef, Vagrant and Test-Kitchen. We have an customized Jenkins Cookbook, it works on "normal" Clients without Cooperate Network Proxys, but fails behind with the following error....
0
votes
1answer
2k views

“Unable to stat /usr/lib/jvm/java-7-oracle/bin/java” when trying to run Tomcat7 with Java8

I'm trying to upgrade my servers to Java8 from Java7 so that they will run my webapps under Java8. On one of my machines I'm getting the following error and I'm not sure what is still referring to ...
-1
votes
1answer
223 views

How does a load-balancer manages end user http sessions? [duplicate]

I don not have experience with Load balancer. But I know what is load balancer i.e. balancing the load of user requests to multiple servers. OR Distributes workloads across multiple computing ...
0
votes
1answer
270 views

How can I get nginx reverse proxy to work with java applet that checks document base?

So I'm trying to setup a reverse proxy with nginx to a java applet on remote server, but the problem I'm having is that it checks the document base, I can get it to load from http://remote.example.com/...
0
votes
1answer
210 views

Tomcat7 ignoring JAVA_HOME

I have been trying to start tomcat7 server without success. I am using the Raspbian distro in a RaspberryPI. When I try to start tomcat: $ sudo service tomcat7 start [FAIL] no JDK found - please set ...
3
votes
1answer
445 views

Enable HugePages on Linux for multiple services/processes

On one of my Debian machines I'm running a service on a JVM and a MySQL instance. I have enable the HugePages following various online guides but I'm having a problem. Here is my configuration: vm....
1
vote
1answer
3k views

ORA-12505, TNS:listener does not currently know of SID after changing port number

I am trying to change oracle tnslsnr port number from default to some other port. After I change port number for tnslsnr from 1521 to 2000 I start geting ORA-12505, TNS:listener does not currently ...
1
vote
1answer
265 views

Garbage Collection and Memory Visualizer (GCMV) Doesn't Always Generate A Report

I'm using GCMV within ISA 4.1 to analyze some gc logs from a cluster. When I open a native_stderr.log file in that tool, it always creates the following 4 reports/tabs: Table data Line plot ...
1
vote
0answers
309 views

elasticsearch glibc memory corruption

My elastic search clusters keep crashing for no reason. All I can see in the logs is : INFO | jvm 4 | 2015/04/17 19:10:09 | *** glibc detected *** /usr/java/jre1.7.0_04/bin/java: malloc(): ...
0
votes
3answers
501 views

How can I install multiple Atlassian applications in a single server?

Ok, this is a two-part question. I got an unmanaged VPS with CentOS from a hosting company in order to install several Atlassian tools, however, I ran into the problem that when starting a second ...
3
votes
0answers
2k views

Unable to change vm.max_map_count for elasticsearch

Prehistory I have elasticsearch and SugarCRM7 running on CentOS 6.5. Every day I face the same problem: java outOfMemory error. That happens because of small vm.max_map_count value, 65530 only when ...
1
vote
2answers
398 views

How to increase heap size for ws_ant.sh when deploying on WebSphere 8.5 (64-bit Linux)

TL;DR -- How do I give ws_ant.sh and/or the <wsInstallApp> task more heap at runtime? I am attempting to deploy a relatively large (~160-MB) EAR file to WebSphere 8.5 running on a 64-bit Linux ...
0
votes
1answer
814 views

Tomcat CPU and GC going crazy [closed]

Having some major issues with our Tomcat 7 installation. It used to run fine for over a year, but now the CPU is mainly at 400% - 700% (8 core machine) and in the logs I see tones of these: 2015-04-...
1
vote
1answer
241 views

In-house java apps work in citrix environment but will not run locally on a users machine

BACKGROUND I am one of three systems administrator for the organization i work at. We previously had a Java developer who is no longer with the organization. The developer built several custom Java ...
0
votes
2answers
506 views

HttpServletRequest.getRemoteAddr() always returns 127.0.0.1

We're attempting to identify where specific requests are coming from inside our Java application. We have changed the log files to include the IP address and we're using httpServletRequest....
1
vote
0answers
29 views

Solr 503 when using boost function

I have three environments which are set up to use Solr: local, staging and production. The local configuration differs slightly to the staging/production however the other two are identical. I ...
0
votes
2answers
145 views

java installed but not working (dependency issue??)

I just installed Java 8 on my new VPS I set the links correctly but, still java, or javac won`t work: root@vpsXXXXX:~# update-alternatives --display java java - Auto-Modus Link verweist zur Zeit ...
0
votes
0answers
62 views

tomcat https static content

We are using tomcat to serve everything over http. BUT, we have a login page which is served over https since we have them enter a password. Recently, chrome has stopped supporting serving non secure ...
2
votes
1answer
19k views

Suddenly error='Cannot allocate memory' (errno=12) [closed]

So this morning I noticed my website is down, went on my server and saw that the webserver has been stopped. When I try to start it again I get this error start -Dhttp.port=80 -Dapplication.secret=*...
0
votes
1answer
7k views

System-wide JRE settings in deployment.properties file are ignored?

Basically I have the same problem as in this question. However the proposed solution doesn't work for me, not on a Win2003 server and not on a Win7 laptop used for testing. I have a Java SE 6 program ...
1
vote
0answers
367 views

Disabled SSLv3 in Tomcat, but Still Showing POODLE Vulnerability

I have a Windows 2008 server with Tomcat 7.0.59 & Java 8u31 & I am trying to ensure that SSLv3 is disabled. Looking at the changelog for Java, SSL3 should no longer be supported and the Java ...
44
votes
5answers
5k views

How do I install the JRE on a Windows server without Oracle adware?

I would like to install Java on one of our servers, but I am reticent due to Oracle's bundling of an Ask.com toolbar and some virus scanner. I've read that the java updater even installs these for ...
0
votes
1answer
517 views

JVM outputs “No console, will fork to get enough memory” when started via cron

I have come across an odd message when starting up a JVM via cron: "No console, will fork to get enough memory". Google only returns a handful of results when searching for that string, so I figured I'...
0
votes
1answer
253 views

Effectively Monitoring Server Load of Production Amazon AMI + Tomcat + Lucee Instance [closed]

Looking for advice as to effectively monitoring the load of a production web server. Preferably solution will be free or minimal cost (server is owned by a very small web development company - read ...
1
vote
0answers
170 views

Taking a thread dump on IBM J9 takes a long time

I'm trying to collect a java core on AIX (java version 1.6). There is only one dump agent configured, which collects a system dump, heap dump and java core on every SIGQUIT, so I used HealthCenter to ...
0
votes
0answers
286 views

Openfire how to fix? Error creating secured outgoing session to remote server

I have a OpenBSD server 5.6, in this server install Openfire 3.9.3. But I am getting the following error: error.log 2015.02.16 08:59:44 org.jivesoftware.openfire.session.LocalOutgoingServerSession -...
0
votes
1answer
2k views

How to run Wildfly best?

Within development I start Wildfly 8 as standalone. Then I copy all my WAR files to /standalone/deployments and run them over http://localhost:8080/projectname/. When thinking of a productive server ...
1
vote
1answer
2k views

(103) Software caused connection abort: proxy: pass request body failed

The following errors are being logged in our proxy Apache logs while processing the request with Tomcat Server: (103)Software caused connection abort: proxy: pass request body failed proxy: pass ...
0
votes
2answers
3k views

Dependancy error when building maven project

I'm trying to move an application from being built locally on a Windows Eclipse installation to a Jenkins server. From what I can see the settings are correct and the dependencies should resolve. Even ...
0
votes
1answer
776 views

Why is my java process using much more heap space than specified?

I'm running a Java application on Solaris using the -Xmx256M switch. When I connect via JMX, the JVM tells me the application is using about 50Mb of heap, and correctly states the maximum heap size is ...
1
vote
0answers
81 views

HP Radio Port 210 web configuration

We acquired used WiFi system to provide better wlan for the customers in our hostel. The switch is HP PROCURVE 5406zl and we have 50 or so HP PROCURVE RADIO PORT 210 access points. I set up the ...
18
votes
2answers
25k views

How can I upgrade to Java 1.8 on an Amazon Linux Server?

I tried sudo yum update but it just keeps java "1.7.0_75". I need 1.8 for it to work with another application but can't figure out how to upgrade it. Do I need to manually install it somehow? There's ...
0
votes
3answers
1k views

Jenkins maven java 7 permission issue

I'm getting this error when attempting a Maven build in Jenkins, Building in workspace /var/lib/jenkins/workspace/xxxxprojectnamedeletedforprivacyxxxx java.nio.file.AccessDeniedException: /usr/share/...
1
vote
0answers
3k views

Add an entire domain to Java Exception list

I'm administering hundreds of machines with Java interfaces that I sometimes need to get into. Unfortunately, the default Java settings in Windows block all of these applications from running, ...
2
votes
1answer
696 views

JVM on Windows - paging and full GCs

We have a Java-based app (TeamCity, on Tomcat, on Java 1.7) running on Windows (Server 2012 R2). Java runs with a 6GB max heap size, and the system has 10GB of RAM. It is the only non-OS service ...
2
votes
2answers
12k views

Java on Linux insufficient memory even though there is plenty of available memory being used for caching

I’m trying to start a process on Red Hat Enterprise Linux Server release 6.5 (Santiago), which is failing because it is not able to allocate sufficient memory. # There is insufficient memory for the ...
1
vote
0answers
231 views

jrun ssl peer not authenticated

Before I start, I should say that I've already posted this question at Code Ranch, and have not yet gotten an answer. I'll make sure both this site and Code Ranch receive the answer should I find one....
0
votes
1answer
216 views

Write sitemap.xml to java webapp root directory permission denied

I'm trying to use the sitemapgen4j library to build my sitemaps. I'm facing a permission problem while trying to write to my root directory https://code.google.com/p/sitemapgen4j/ the root context ...
6
votes
1answer
17k views

How to switch between TLS 1.0 and SSL 3.0 at Java/JRE level?

I am using java 1.6. I have setup my tomcat as my ssl enabled server. And i have setup a ssl enabled client (java code). When i do a communication from my client to server. In java ssl dump in tomcat ...