log4j logger leaving period(.) for trailing white spaces?

Hi,

I have a java application with Apache log4j logger ( using Eclipse IDE).
The logger prints error and ouput onto a file.
When it is run locally, it looks OK

***Method Name ***
Header # of Product
 name1      100
 name 2      2000
*** End of Function ***

But when the java app is run in the IBM mainframe, it shows period, '.' for trailing white  spaces.

***Method Name ***..........................................
Header # of Product.........................................
name1      100.................................................
name 2      2000...............................................
*** End of Function ***......................................

Can't figure out why it is doing that.
Any suggestions??
Thanks.