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

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1answer
54 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
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0answers
15 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 ...
0
votes
1answer
74 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
48 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
3answers
5k views

Tomcat 7 Throwing Unsupported Class Version Error

I'm setting up a Tomcat server to host JSP sites. I have created a test application in Eclipse to make sure everything is working. All it does is print text in JSP, then call a function in a custom ...
0
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0answers
84 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
46 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 ...
-1
votes
1answer
45 views

I wonder, How does a load-balancer manages the session?

HttpSession is stored in Servlet container i.e. web container. Load balancer does not maintain Web container, it just push the request to web containers which are under the load-balancer. My Question ...
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0answers
52 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 ...
1
vote
1answer
125 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 ...
2
votes
2answers
2k views

Java, Eclipse: How do I pause a running program?

I am running some computation on my Linux box and can't really afford to run it on battery while I drive home. It requires a network connection and currently I am running this stuff on a wireless ...
0
votes
1answer
205 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 ...
0
votes
1answer
64 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 ...
0
votes
1answer
39 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 ...
0
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0answers
44 views

Update jar file inside jar

Previous to the deploy of an application I need to add a file inside a war which is inside an ear file. Right now I am doing it by extracting first the war file, updating the war file and then ...
3
votes
1answer
69 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: ...
0
votes
3answers
72 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 ...
1
vote
1answer
348 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 ...
8
votes
1answer
10k views

How can I block Java updates, network-wide?

Java is constantly prompting users to upgrade and, when they do, it tries to install all sorts of other things which we must uninstall. Lately it installs a backup program called Carbonite. We’ve ...
1
vote
1answer
385 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
49 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 ...
0
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0answers
20 views

java.security.NoSuchAlgorithmException: SecureRandom IBMSecureRandom implementation not found

I am trying to connect to a JRE that is publishing JMX information. When I do, I get the following error: Exception in thread "main" java.lang.reflect.InvocationTargetException ... Caused by: ...
0
votes
2answers
151 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 ...
0
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0answers
32 views

Tomcat throws java.nio.charset.IllegalCharsetNameException on attempted start

I'm installing the Dspace repository system on a freshly initated BlueHost VPN. Dspace is served with Tomcat, so as part of the installation, I have to install and start Tomcat. First order of ...
0
votes
2answers
2k views

WebLogic Server internal server error

when I deploy a project in Apache Tomcat 6.0 it's working fine. When I deploy the same project in weblogic server 10.3 it's showing an error like below: Error 500--Internal Server Error ...
0
votes
1answer
476 views

How do I change Jboss' logging directory

I'm running jboss-as 7.2. I'm trying to configure all log files to go to /var/log/jboss-as but only the console log is going there. I'm using the init.d script provided with the package and it calls ...
1
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0answers
74 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
2answers
113 views

Prevent APT from overwriting custom files

My server runs a Java application that requires I replace a few java library files with ones I downloaded on my own. This has to do with JCE security extensions and isn't really relevant to my ...
10
votes
7answers
35k views

Batch file to uninstall all Sun Java versions?

I'm setting up a system to keep Java in our office up to date. Everyone has all different versions of Java, many of them old and insecure, and some dating back as far as 1.4. I have a System Center ...
1
vote
3answers
1k views

javac compiler throwing error in CentOS 5.7

I'm trying to install Red5 on a vps running CentOS 5.7 in MediaTemple using this how-to (dv):Install Red5 Media Server but on step 7 I get this error: BUILD FAILED /usr/local/red5/build.xml:217: The ...
0
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0answers
30 views

How to fix hung requests creating dead lock(/root/syn)?

We are running a search service using written in Java using solr We are noticing dead locks on the service. 14:00:30,465 WARN ThreadPoolAsynchronousRunner:416 - Task ...
0
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0answers
16 views

Glassfish4: Should I run multiple applications in one domain?

I have 5 different Java EE 7 applications (WAR files) that communicate to each other via a REST interface. In production, is it "better" to deploy them all in one Glassfish4 domain, or to create a ...
2
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0answers
389 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 ...
0
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0answers
68 views

Memory Leak in Solr cloud 4.8.1 and Lucene

I have a solr cloud instance version 4.8.1 with 8 nodes, 4 shards and facing memory leak on the JVMs here are the details of the instance. 8 nodes, 4 shards(2 nodes per shard) runs on Tomcat ...
4
votes
2answers
10k views

Which Java version should I run Jenkins with?

Reference: Jenkins Users :: Jenkins on Windows: Java + JRE (version) confusion Which Java version should I run Jenkins with (on Windows)? Should I use the included JRE of the Windows master? Should ...
1
vote
1answer
890 views

iDRAC6 JViewer Unusable

I'm getting the following error when trying to launch the Virtual Console, but the Virtual Console Preview works fine (it displays a small preview about once a second). I've confirmed that my M610 ...
0
votes
1answer
126 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: ...
0
votes
2answers
516 views

Frequent occurence of FULL GC

There is a frequent occurence of FULL GC in our system. We are using Java application running on Tomcat server. Our application is running using internal load balancer setup. We are seeing lot of ...
0
votes
3answers
529 views

Proper acting when a process is consuming 100% time of CPU

On several machines I have a problem with a process that is using 100% time of a CPU. USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND root 85740 100.0 0.2 34668 ...
2
votes
3answers
3k views

JMX connection to Tomcat running on Amazon EC2

My Tomcat 7 process, which I run on a server on Amazon EC2, has settings such as these in CATALINA_OPTS which should allow me to connect for JMX monitoring remotely: ...
8
votes
1answer
373 views

Good practices regarding discontinued software in production (OpenDS)?

How bad is it to use OpenDS, which is not actively maintained, and had the last patch in 2010, and require JDK6(which is also obsolete) in a production environment?(Although at the backend and not ...
7
votes
2answers
7k views

SSL Certificate Error: certificate_unknown

I want to create push notification server and while installing SSL certificate and .p12 file in server we are facing the below error: I want to know what is the wrong with ssl certificate because I am ...
1
vote
1answer
81 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
0answers
214 views

json works on localhost but not working on my real server

I have an application that is getting information from my server (online), I have a version of that website in my computer (localhost), The application is working on localhost can get the json, But I ...
2
votes
1answer
348 views

Can I connect multiple SPAN Ports to a hub to monitor both from one NIC

Suppose I had two Cisco switches each outputting some network traffic to a SPAN port, and I needed to send the sum of all that traffic to a third device for monitoring that traffic via libpcap. The ...
1
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0answers
19 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
0answers
68 views

OpenShift, change java security properties

The latest WildFly OpenShift image includes Java 8u31. But my apps needs the disabled sslv3 'algorithm'. So I need to edit the java.security file from the JRE but this file is read-only. How can ...
0
votes
2answers
68 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
67 views

CORBA lookup fails with NameNotFoundException

The CORBA lookup works fine from localhost: thufir@doge:~$ thufir@doge:~$ appclient -client NetBeansProjects/corba/GreeterCorbaClient/dist/GreeterCorbaClient.jar {org.omg.CORBA.ORBInitialPort=3700, ...
0
votes
0answers
30 views

Apache 2.4 switching sessions from primary to backup in between even when sticky session is enabled

I am facing issue with long running requests . We have a case of file upload in which file upload process starts and at front end we represnt the user with a progress bar to show the percentage of ...