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

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215 views

Preserve imported CA Certificates through Java upgrades

I have imported internal Certificate Authorities into Java's CA keystore. (Using keytool to import into the "cacerts" store) This works fine and dandy, until I update the Java RPM. At which point ...
0
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1answer
188 views

Connect with Java to Amazon EC2 instances

I have written a client-server application in Java and I want to run it on Amazon EC2 Ubuntu instacnes. The client runs on an EC2 instance and the server on one and the third EC2 instance is for ...
0
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1answer
172 views

Using self signed certificates with Tigase XMPP server

I am trying to use a self signed certificate, generated using http://docs.tigase.org/tigase-server/5.3.0/adminguide/#_server_certificates, to start the XMPP server. However, the server does not start ...
0
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1answer
641 views

tomcat not able to start in jpda start mode

This is my catalina.sh #!/bin/sh JAVA_HOME="/usr/local/java" CATALINA_PID="/usr/local/tomcat/tomcat.pid" CATALINA_HOME="/usr/local/tomcat" JAVA_OPTS="-Xloggc:/usr/local/tomcat/logs/gc.log -Xms3072m ...
1
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0answers
123 views

Inconsistent data transfer throughout Ubuntu server causes system instability and data corruption [closed]

Update 2 We replaced the CPU, and all is good. It was a busted CPU! Update We replaced the motherboard, and are still getting the exact same problem. Does this mean it is a faulty CPU? What else ...
0
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0answers
40 views

What could be the possible causes of a “java.io.IOException: Bad HTTP request, less data is received than expected” error?

I have a GlassFish server with a lot of "java.io.IOException: Bad HTTP request, less data is received than expected" errors in an application instance log. Anyone knows what could be the possible ...
0
votes
1answer
149 views

OpenShift allow permanent external access to PostgreSQL [closed]

I have an OpenShift gear with Nginx and PostgreSQL, and need to allow a Java applet (served from Nginx) direct access to the PG database. I've already tried to edit ...
0
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0answers
52 views

How to profile how much memory my tomcat server needs?

I'm running a tomcat server on my own for the first time and I was shocked by how much memory Java apps need compared to apps in other languages. Since I am paying a web host, I want to determine how ...
2
votes
1answer
172 views

ES fills up heap slowly over time and hangs at 14GB, while biggest index is 164MB?

I have an issue with Elasticsearch, at some times, it tries to run GC continously since this one is unable to free because heap size set to 14GB (min and max) is said to be completely allocated: ...
0
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2answers
33 views

Hide/mask tomcat from open access

How to mask tomcat app adress from public access easily. Let's say we run it on default port 8080. So myapp.com:8080 is easy to scan, whatever port we use it's no problem. Lockoutrealm that tomcat ...
0
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0answers
384 views

Hadoop data node start fails with error: java: cannot execute: Permission denied

I am facing an error in starting a Hadoop Data Node from Ambari WEB interface, and I need your help to resolve this. As always the error message is very comlex and long, but first thing first. Even ...
1
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0answers
390 views

Unable to convert JKS keystore to Oracle Wallet using orapki

I have generated jks keystore using keytool and using the jks keystore I have csr. The same csr I have sent to Signing authority. The Signing authority have given the trusted ...
0
votes
2answers
248 views

JVM will not start when starting Glassfish on RHEL

GlassFish 3.0.1 RHEL 6.3 When trying to start GlassFish I get the following JVM error: JVM failed to start: com.sun.enterprise.admin.launcher.GFLauncherException: The server exited prematurely with ...
1
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0answers
32 views

Glassfish 2.0 - per node JVM config

I have a Glassfish (2.0) cluster with two nodes. I want to pass some extra JVM settings to a single node only. Is this configurable? At least from the console I see, this selective configuration is ...
1
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0answers
204 views

How to protect tomcat application - user authentication with fail2ban?

AFAIK tomcat6 does not use Apache std .htaccess auth, but has own user authentication method. My question is: How to protect it against brute force attack with fail2ban ?
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0answers
125 views

Java Spring application working on one system, dying on almost identical one

Introduction I'm running a third party Java Spring application on RHEL, that refuses to run on machines cloned from a certain RHEL 6.5 template. It just dies on startup with a bogus exception (see ...
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2answers
33 views

Apple OSX with JVM support (or any virtual machine) [duplicate]

Few things I didn't understand on OS X... From 2010 until today... Throughout the internet there were several sources stating that according to Apple's EULA it wasn't legal to run any virtual ...
0
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0answers
75 views

Client authentication on tomcat fails

I have a Apache Tomcat 7.0.39 server running on a Windows server machine and I'm trying to enable client authentication. I first tried this using eclipse on a client machine I have (also on windows ...
0
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0answers
259 views

tlsv1 alert internal error - SSL certificate misconfiguration on Tomcat7

I have configured a certificate on my tomcat7 a few weeks ago and, after having an issue using a facebook plugin on my website, the Facebook Plataform Team pointed that: 'this issue is caused by an ...
0
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0answers
192 views

tcpdump on any interface does not support VLAN

I have tried the following command: tcpdump -i any vlan , on both Ubuntu 10.04 (kernel 2.6.32-36) and Ubuntu 12.04 (kernel 3.8.0-39) and got the following output: tcpdump: no VLAN support for data ...
0
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0answers
22 views

What memory settings are in effect (system or user) in a Citrix Windows 2008 environment running JRE 1.6?

I am looking at a virtual desktop on a Citrix server running a Windows 7 desktop. The JRE environment control settings look like this -Xmx300m but the user environment control settings are blank. ...
0
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1answer
43 views

TOP processes by system time

I have a system running 2 processes - MySQL and Java I'm seeing 20-30% of the time spent in %system. I've looked around to try and find a way to identify which what the balance of the system time is ...
13
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4answers
368 views

How to convince my Administrator that Java ON A SERVER is not insecure per se?

The Application We have a small Java application which uses some Camel routes to pick up uploaded files from a webserver, process them and send out some e-mails with the results. The server on which ...
1
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0answers
501 views

Upgrading to Java 7u65 breaks my Deployment Rule Set for Oracle applications

My company uses an older version of an Oracle application that requires Java 6u45. Naturally we want to be secure, so we use a Deployment Rule Set to specify 6u45 for that internal application and let ...
0
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2answers
152 views

Changing process priority in linux for jvm process

Is it fine if I change the JVM process priority through nice at server machine [linux]. I wanted my JVM process to use maximum resources from OS. What is the standard practice? Do people tune the ...
1
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0answers
444 views

JVM process resident set size “equals” max heap size, not current heap size

After a few reading about jvm memory (here, here, here, others I forgot...), I am expecting the resident set size of my java process to be roughly equal to the current heap space capacity. That's not ...
0
votes
3answers
179 views

How to update OpenJDK on RHEL

I need to update OpenJDK for one of the company servers (RHEL 6). It is currently running OpenJDK 1.7.0_09 but I need to upgrade to OpenJDK 1.7.0_45 I read some tutorials but they seem to use yum ...
0
votes
2answers
103 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 ...
1
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0answers
80 views

DRS: Unknown JNLP Location

We are using Deployment Rule Sets to limit access to the older JRE to well-known applications but are running into a problem. One business critical applications has the following properties (*s to ...
1
vote
1answer
390 views

RHEL Java Application returns “No space left on device” but only 3% used [duplicate]

My Java Application returns following Exception when saving a new file in /opt/wso2 on a CentOS 6.4: Caused by java.io.FileNotFoundException: ... (No space left on device) Caused by: ...
0
votes
1answer
59 views

504 error crash on openshift

I have deployed a java application in openshift. I am using bronze plan. My application is a scaled application and also uses 4GB of memeory. I got an 504 error crash two or more times in a day. ...
3
votes
2answers
767 views

Why is Wireshark not capturing certain POST requests?

If I use this filter in Wireshark: http.request.method == "POST" and use the vote buttons to vote for a stack exchange question, then Wireshark captures the corresponding POST request. I can also see ...
0
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0answers
194 views

CouchBase Client Fails to Cache Object less than 20mb. Time Out Error

I am caching my serialized POJO s(4mb-8mb size objects) concurrently into Couchbase server with CouchBase client (couchbase-client-1.4.3). for(upto 20 itertarions){ new Thread().start().. ...
0
votes
2answers
103 views

Java Deployment Ruleset not working

I've created a Java Deployment Ruleset that looks like this: <ruleset version="1.0+"> <rule> <id location="http://hpfweb.mydomain.com/" /> <action ...
0
votes
1answer
191 views

Record raw http requests in weblogic

We are running a java ee application on weblogic 12.1 that has a soap messaging component. We are having trouble with our soap responses and want to get more details so we can figure out exactly what ...
0
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0answers
445 views

java.lang.ClassNotFoundException: org.postgres.Driver when starting PuppetDB

When I start puppetdb I am getting the following error: cat /var/log/puppetdb/puppetdb.log 2014-08-06 11:29:50,558 ERROR [main] [utils.logging] Uncaught exception java.lang.ClassNotFoundException: ...
0
votes
1answer
28 views

Nginx: index mapping

I'm trying to install Nging as a frontend server for HTTP requests but the welcome page does not work: server { listen 8081; server_name localhost; root ...
0
votes
0answers
104 views

Glassfish-3.0.1 mixing user sessions - SSO

We are experiencing a strange behaviour, we have an application (jsf 2.2.4 embedded) that has a login form, glassfish has sso enabled and a custom realm (LDAP). We have also several applications (some ...
0
votes
0answers
67 views

Tomcat breaks encoding of uploaded file in CP1250

I have a Java web application which processes uploaded files in different encodings. When I run this app on Tomcat 7 installed on my Windows PC and I upload a file encoded in CP1250, everything works ...
-3
votes
1answer
139 views

debian - using apache virtual host as proxy [duplicate]

I have a server with debian 7.4 and apache2 installed. I have setup virtual hosts and all works well. Now instead of pointing the virtual host to a documentroot I need it to point to a port on the ...
0
votes
0answers
135 views

Handle many requests Web Services

I created a web service with Jersey and Tomcat in localhost. Now I want to expose my web services to all users in the world, so let's assume you have many concurrent requests. I have access to a ...
3
votes
1answer
2k views

How to replicate Memcache data among servers

A same question in SO can be found from here . But since I couldn't find any suitable answer, I am asking with additional info. I have many memcache clients but all of them access one memcache server ...
0
votes
1answer
222 views

Install Apache Derby on CentOS 6.4

I'm not a Java developer, my knowledge is very limited to this topic. I want to deploy a .war webservice on my Tomcat server, which fails most likely because of its Derby dependency (just a guess from ...
1
vote
2answers
270 views

Tomcat crashing after a few hours

I'm running a CentOS 6.5 64 bit OS with Tomcat and one web application. I use Apache (httpd) as a reverse proxy (ProxyPass) to the application. Until recently, it (Tomcat) has been running fine ...
0
votes
2answers
112 views

Multiple java versions

I have a server running rhel5 and jre 1.6. All my apps are running perfectly for now. But I want to install java 1.7 but keeping java 1.6 as the default so my running apps want be affected. If I want ...
2
votes
1answer
308 views

Error while installing jasperserver

I am about to install a jasperserver instance on my server. This is not my first jasperserver installation and I did this already on my host system and on a lxc. But now for some reason I get ...
0
votes
1answer
51 views

Strange behavour of which in a shell script launched as a forked process

So I have a java process that is doing some automation. One of the things it has to do is find the JDK home on random machines. So I wrote a shell script to try and find the JDK home assuming that ...
0
votes
1answer
81 views

Java 7 or 8 is required to Run .Jar (Linux)

This is a newly installed CentOS 6.2 x86_64 I have downloaded java 8u5 RPM for GNU/Linux to run a .jar file, but I am unable to. I have removed java through terminal through the command rpm -e ...
1
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0answers
158 views

Tomcat 8 with Apache, Configure Several Java & WordPress Domains

** PROBLEM SUMMARY ** I think the subject line defines my question pretty well, but I'm going to give an example of my current and goal setup for clarification. Considering the sheer number of ...
-1
votes
2answers
305 views

CENTOS Vs Windows 2008 R2 [duplicate]

We have an application running on Windows Server 2008 R2 with Apache WAMP, Tomcat, Mysql, PHP and java SE for last 4 years. Its a Web based ERP application. I would like to know if it makes sense to ...