Hi, I would like to raise an issue concerning the MDC (in log4cxx 0.10.0 and log4j 1.2).
Is it possible to introduce MDC key-value pairs, say generalised MDC values, which are not thread privat? I like the concept of MDC but have the problem of logging many instances of the same application (with many threads) running on many hosts. The messages logged are send to a remote logging instance. Usually, we cannot distinguish between the instances running on the same host. Here I use the MDC. In this situation, a generalisation of the MDC would give me the possibility to add values which help me to distinguish between the instances (without carrying this information within the log-message). The advantage of this generalised MDC is the existing treatment of the MDC values (XMLSocketAppender, XMLSocketReceiver, DBAppender). Perhaps it is sufficient to add a generalised 'put' and 'get' method to a 'global' hash in the MDC. In the moment, I have to look whether the MDC still has values which consumes unnecessary time (and this is rather uncool). Perhaps you have a better clou to this point. If so, please let me know. Cheers Stefan
