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Questions tagged [java]

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

1835 questions
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Creating New WebSphere cluster

I need to improve WAS perfomance and want to make cluster. I have two separate machines with WebSpphere 7 on it. As I see to do this, I need to add node from my second (remote) WAS to the first one. I try to use "Add node" from console, but without…
Alexey
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Websphere ND Dmgr - Application Server collocation advantages and disadvantages

In a Websphere Network Deployment Architecture, what would be the drawbacks of collocating a deployment manager server with one or more managed application servers on the same host? In other words, should I collocate Dmgr with other servers or have…
trikelef
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Tomcat memory usage higher as -Xmx and -XX:MaxPermSize combined

i have several tomcats running on Windows 2008 R2 Server, which are all configured to use 2G as -Xmx and 256m as -XX:MaxPermSize. In the Windows task manager i can see that some of those tomcats use up to 4G of memory, which triggers our monitoring…
user152638
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Coldfusion 10 Keep-Alive Requests = 0?

Ran 'ab' against a .jsp page (Tomcat7) and .cfm page (Coldfusion10 Enterprise). ab correctly records keep-alive results for the .jsp page but not for the .cfm page. It appears keep-alives aren't being honored by CF? Maybe a setting? I've googled…
Jason Caldwell
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Error in invoking javac - Debian Squeeze

I am trying to solve this issue: PWC6345: There is an error in invoking javac. A full JDK (not just JRE) is required We have a third-party Java app that uses a Jetty server but looks like either the JDK is missing or not reachable where it is…
Slinky
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Getting exposure to big data without having to set up the environment

Is anyone aware of any sandbox where an environment is already set up for big data processing? It can be hadoop, cassandra, pig etc... I'm a sql server programmer, and trying to get into big data/nosql solutions, but having a very difficult time…
Alex Gordon
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Download all JAVA updates per version

Gentlemen, I need to download all updates of a specific version of Java Runtime Environment (ie, I need to download, jre6u1, jre6u2.....jre6u37, etc), I order to test different versions on a deployment. Any suggestions on how to do a batch download…
Lexicon
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Can the JVM(Oracle) run into an OutOfMemory error if the heap size is below the max?

I am running a Tomcat site(with an NGinx front end) that seems to be randomly running out of memory even though the max heap size is pretty large. My question is is it possible for the JVM to get an OutOfMemory error even if the heap size is…
user439407
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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 version that I really want to be using. But if I do a…
techsjs2012
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Files created by java API cannot be accessed through JSP

In a web application, I will use both java API and Linux System Calls to create a new directory, copy an image inside it and finally create a XML file with outputWriter. Then I will create download links to these resources on a JSP page. So far…
mdoust
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CentOS 6 and Sun/Oracle Java Issue

Possible Duplicate: Linux out of memory on VPS I have a OpenVZ VPS running CentOS 6.3 64 bit and when I try to install JRE 7 64bit using the command: rpm -Uvh java.rpm It gives me this error: Preparing... …
user1710563
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How do I install javac (JSDK) on Scientific Linux, 64Bit

I am trying to finds a way to install the Java SDK (javac) on Scientific Linux 64bit with yum or anyway.. Can someone please tell me the best what to do this so I can use maven for my builds etc
techsjs2012
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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 Error: Could not create the Java Virtual…
Bart van Heukelom
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Twitter client?

I have a voice server which currently sends an email to notify when someone called. But actually, since messages are very short ("[object] Name - number"), the server could just as well send a message with Twitter instead of forcing users to connect…
OverTheRainbow
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Can't update scala on Gentoo

As I wanted to test Scala 2.9.2 on my gentoo system I tried updated the package but ended up with this error. I can't figure out where the problem may be: Calculating dependencies ...... done! >>> Verifying ebuild manifests >>> Jobs: 0 of 1…
Uwe L. Korn
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