We've been using the 32bit linux version of the JavaServiceWrapper for quite a while now and it's working perfectly. We are now considering also using it on 64bit linux systems. There are downloads for 64bit binaries on the website, but looking into Makefile for the 64bit version I found the following comment, though:
# This makefile is in progess. It builds, but the resulting libwrapper.so does not yet work.
# If you know how to fix it then please help out.
Can anyone confirm, that this comment is just outdated and the resulting wrapper will work without flaws?
I've had it running in production on 64-bit red hat without any trouble for the last year or so.
From http://wrapper.tanukisoftware.org/doc/english/introduction.html :
Binary distributions are provided for
the following list of platforms and
are available on the download page.
Only OS versions which are known to
work have been listed.
(snip...)
linux - Linux kernels; 2.2.x 2.4.x, 2.6.x. Known to work with Debian and Red Hat, but should work with any
distribution. Currently supported on
both 32 and 64-bit x86, and 64-bit ppc
systems.
Take a look at http://yajsw.sourceforge.net/.
It's free and rather compatible reimplementation of TanukiSoftware Java Service Wrapper featuring free 64-bit support.
Related
I am facing issue to install 32 JVM on mac osx 10.10.5. When i run the command java -version -d32. It shows me this error.
Error: This Java instance does not support a 32-bit JVM.
Please install the desired version.
How can i resolve this error and install 32 JVM on my machine.
I have checked the Java official websites but i have not found the jdk version 32 bit version. Can anybody point me to the documentation. Also, i have searched the net but have not found any direct answer.
So, you have HUGE problem here. Oracle provides JDK in 64bit flavor only. You can always try to install JVM from Apple (1.6). As far as I recall, it was supporting 32/64 bit (to be checked):
https://download.developer.apple.com/Java/java_for_mac_os_x_10.6_update_3_developer_package/javadeveloper_10.6_10m3326.dmg
Another thing you can do is to look for OpenJDK binary with 32bit support:
https://wiki.openjdk.java.net/display/BSDPort/Main
Apologies in advance. I know this is a basic question.
I am new to server administration. I am administering a server where the users do Java development.
They have a Java-based application and do development in Eclipse. Eclipse is 32-bit. The OS is 64-bit.
I recently updated the JDK and JRE on the server. I have both the 64-bit and 32-bit of each installed.
Eclipse ran into an error where it couldn't start after I had updated to the new JRE and JDK. So I took some advice online and updated the -vm path in the Eclipse .INI file to point to the new 32-bit JRE path. It now works.
I have two main questions:
Will updating the JRE and JDK EVER cause an issue with development, or as long as they can open up Eclipse and use at least one version of the JRE or JDK, they will be fine? I guess my fear is that they are going to develop in a certain version and the next version will cause issues down the line.
They develop in 32-bit Eclipse (not sure why they chose 32-bit) but their application runs with 64-bit Java (that is where the path points to for that installation). If something is developed in 32-bit Eclipse can it run with 64-bit Java? Side question: is there a certain advantage with developing with 32-bit Eclipse on a 64-bit system or is it personal choice?
Thanks a lot and cheers!
I guess my fear is that they are going to develop in a certain version and the next version will cause issues down the line.
Java 6 and 7 are end of life; Java 8 code should still be run when Java 9+ rolls out. I've not been aware of any backwards compatibility issues in recent years, it's only forward compatibility that doesn't work (running Java 8 compiled libraries with JRE 7).
They develop in 32-bit Eclipse (not sure why they chose 32-bit) but their application runs with 64-bit Java
The IDE and code run in separate processes. There's no harm in using the 64bit JDK with 32bit editor.
Eclipse 32 bits running on 64 bits JVM
Should I use Eclipse 32bits or 64bits on my new machine?
Will updating the JRE and JDK EVER cause an issue with development...
I believe it technically could render what you developed "obsolete" if you're initially using one JDK with some specs and change for another one with specs that are not "compatible" with what you built so far. By specs, I mean the libraries, tools, etc that the JDK contains. But I would say it would be unlikely that such problems occur. It personally never happened to me. I'd like to have someone with more knowledge give more details though and validate what I'm saying or correct me if I'm wrong.
If something is developed in 32-bit Eclipse can it run with 64-bit
Java?
To my knowledge, there are not related things. In my mind, Eclipse is just your IDE and it allows you to build/compile code using specific JDK (32 or 64 bits). As a matter of fact, you don't even need eclipse to build code but you definitely need a JDK: it's the JDK that give you the tools to compile code that "targets" a specific JRE/JVM and Eclipse is using the tools your JDK provide.
So yes, you can use eclipse 32 bits to build code for a 64 bits JRE.
The java library I need (jpcap) only works on Java 6, it won't work with Java 7. Is it still possible to install Java 6 on Ubuntu? According to the Ubuntu Help:
Oracle (Sun) Java 6 is no longer available to be distributed by Ubuntu, because of license issues
I've tried to use the instructions on the same site but they don't seem to work...
./jre-6u34-linux-i586.bin doesn't seem to do anything!
Check out these instructions on how to install Sun JDK 6. In older versions of the repositories the desired package is included.
If you're not obliged to, try using jNetPcap instead. It's another wrapper around pcap, it just works on more recent JVMs and is not restricted to 32 bit architecture.
I would try the OpenJDK 6 which AFAIK is fine on Ubuntu and check you have the right version 32-bit vs 64-bit for your machine. i586 is 32-bit and won't work with a 64-bit build of jpcap.
I am trying to debug a j2ee application in tomcat using Intellij Idea in an OS X 10.6.4 system. I need it specifically to run over a 1.5 JVM and 1.5 JDK so that the jgroups-all component doesn't crash the application through this error:
class: java.lang.ClassNotFoundException: [Lorg.jgroups.Address;
at com.opensymphony.oscache.plugins.clustersupport.JavaGroupsBroadcastingListener.initialize(JavaGroupsBroadcastingListener.java:119)
Has anyone needed to install an older version of JVM or JDK in OS X before?
NOTE: I'm a Mac newbie.
Thanks, everyone.
Well, as far as I know you should be able to choose an older VM in the Java control panel, although I think Apple removes old JREs by default now.
Did you consider Apple's Java Deprecation before starting you project? It looks like you will be out of luck in the near future. If Apple doesn't even want to support some recent JRE anymore it is unlikely that they will offer old, unsupported ones, which even Oracle ended support for.
Even if Oracle will provide some JRE/JDK for Mac OSX it is highly unlikely that they will back-port some Java 5 to Mac OSX. Your best bet is to migrate your application to a version which is supported first, before doing any other steps.
Try the solution here.
Sun's website is confusing.
I am looking for Java 1.6 Enterprise Edition SDK for WINDOWS 7 64-bit.
I found the 64-bit Standard Edition, and the 32-bit Enterprise edition.
Can anyone help?
Thanks
The 32bit vs 64bit refers to the JVM itself, as well as some core libraries. So the 64bit JavaSE download is the JavaSE runtime on top of a 64 bit JVM.
On top of that, the majority of the JavaSE APIs and libraries are not specific to 32bit or 64bit. JavaEE runs on top of JavaSE, and so it's not 32bit-64bit specific.
So, pick the JavaSE appropriate to your environment, and don't worry about it for JavaEE.
I'm going to answer my own question, how about that:
https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_SMI-Site/en_US/-/USD/ViewProductDetail-Start?ProductRef=java_ee_sdk-6u1-wjdk-oth-JPR#CDS-CDS_SMI
I had Java SE 64-bit installed and I tried to install Java EE. I had the following error (well something like that):
Missing Java installation...
If Java is installed on your computer you can try : Java_EE.exe -j (Java(TM) Directory Installation)
I tried the -j command with JDK, JDK\bin, JRE, JRE\bin
I tried to reinstall java 64-bit
I tried re-setting JAVA_HOME, PATH and CLASSPATH variable just for
the sake of it...
Nothing worked
I installed Java SE 32-bit, double click Java_EE.exe and everything work...
EDIT : And now to complement the strangeness when I go through the Java_EE.exe installer, the installer spot my Java SE 64-bit edition (maybe because I set the environments variables)