UCSM 2.1.3a - Login Error: java.io.IOException: Server returned HTTP response code: 400

Recently I have run into an issue in a customer PoC and encountered a weird issue.  Everything looks fine except I cannot login UCSM.  The UCSM code I am running is 2.1.3a, and I have got the error message:

"Login Error: java.io.IOException: Server returned HTTP response code: 400 for URL: http://ucsm_ip:443/nuova"

Eventually I've found out the JRE 7u45 update breaks this, after lowering the version it works fine now.

Maverick - No Java runtime present, requesting install

After upgrading to Maverick (OS X 10.9), when I try to run java –version in terminal, it showed the error "No Java runtime present, requesting install", however nothing happens except showing this error message.  The solution is to download the official java package from apple website:

http://support.apple.com/kb/DL1572?viewlocale=en_US

Firefox Java Plugin on Linux

JRE Version: 1.6.0_07

Firefox version: 2.0.0.14

One of the most common problem that you might encounter is you can’t get your firefox showing Java content correctly.  Only a few steps are needed to get that working:

 

1. Go to www.java.com to get the latest JRE and install it. 

2. I have extracted the JRE at /usr.  The java plugin for firefox is at:

/usr/jre1.6.0_07/plugin/i386/ns7/libjavaplugin_oji.so

Symbolic link it to the Firefox library folder:

ln -s /usr/jre1.6.0_07/plugin/i386/ns7/libjavaplugin_oji.so /usr/lib/firefox-2.0.0.14/plugins/libjavaplugin_oji.so

3. Restart the firefox and see if you can see the Duke logo dancing at the following link:

http://java.com/en/download/help/testvm.xml