hello, the version is logback v_1.3.0-alpha4, maybe i dont understand all, so i have a couple of stupid questions. 1. AsyncAppenderBase.java , line 57 , i only see a worker (a thread) to consume blocking queue, is there any configuration to change to mutil threads? Or , why not use mutil threads to consume, i think it may improve performance . 2. OutputStreamAppender.java , line 217, judge whether started or not, but this line is before the write lock . OutputStreamAppender.java , line 197, is it possible that the outputstream is already closed , but some write threads are still waiting for the write lock in line 297, then write to stream that are already closed? 3. OutputStreamAppender , line 141, why not immediately flush the outputstream after writing footer bytes? thank to you , first. Can anyone give me answer? -- Sent from: http://logback.10977.n7.nabble.com/Developer-f3683.html