log4j Integration

I am working on a project which involves two development environments:
one is in java and uses log4j, the other in perl using log4perl.
Programs in either system are called interchangeably, and we would like
to integrate both the logging systems so they log to one file. What is
the best way of doing this? I've looked at using an SocketServer with
log4j and a SocketAppender with log4perl, but I get stream header
errors when sending. I noticed there may be a way to get the two to
talk using XMLSocketServer's and XMLSocketAppender's, but that is only
available in the alpha version of log4j, which I cannot use yet. Has
anyone else tried to get a similar setup going (i.e. log4perl and log4j
using the same appender)? Thanks.