'Arial' is not available to the JVM. See the Javadoc for more details

Solution
Step1:Check whether font "Arial" is already installed on the box :
#ERROR!
log in with any user name and type the following command :
fc-list | grep Arial
if found no need to install the font.
Step2:Install the font "Arial" if not available on the box:
#ERROR!
1)log in as root
2)move to /usr/share/fonts and create a folder with name as "truetype".
3)copy the font file "Arial.ttf" (found in windows/fonts on WinXp) into the folder "truetype".
4)run the command following command to see whether the font is installed properly
fc-list | grep Arial