Is there an alternative way for logging other than log4J?
Yes, it is possible to use an alternative to log4J.
In VSJ 3.2 we changed the logging approach so that it is no longer hard coded to use log4. Instead it routes through Apache Commons Logging. This has various advantages, including the fact that it works better with WebSphere, because WebSphere includes a Commons Logging implementation that routes everything to WebSphere's native logging infrastructure.
So please upgrade to VSJ 3.2 or greater to have this functionality.