This is a problem that I run into all the time. I'm thinking that it would be easier to handle the problem with tools that read and parse the log file after the fact - or use a database appender. The number of debug entries on a particular thread is unconstrained and this could cause logback to suffer from low memory or out of memory problems trying to pre-sort them. I've actually been working on a tool for this and have made some progress. Donald On Thu, Mar 7, 2013 at 1:21 PM, janolaveide@gmail.com <janolaveide@gmail.com> wrote:

I have read about the Mapped Diagnostic Context, and although useful, the log statements from different threads still appear interspersed in the output.

What I would like is to have all log statements from a thread outout consecutively when that thread is done (and I know what and when "done" is)

For example :

Thread A starts at time T-Astart, performs logging at various points, and is done at T-Adone.

Before A is done, at time T-Bstart (T-Adone < T-Bstart < T-Adone) another thread B starts processing, does the same kind of logging and finishes at T-Bdone.

Now, I would like all logging statements from thread A to appear before the logging statements from Thread B, and not interspersed as the MDC examples I have seen. Is this kind of deferred, grouped logging possible with logback ?