-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I hear ya on the sifting appender only accepting 1 key. And I changed the jobId to MDC.put("fname",jobGroup+"/"+jobName+"/"+jobId ); which does work with the following configuration: <appender name="jobLoggerAppender" class="ch.qos.logback.classic.sift.SiftingAppender"> <discriminator class="ch.qos.logback.classic.sift.MDCBasedDiscriminator"> <key>fname</key> <defaultValue>unknown</defaultValue> </discriminator> <sift> <appender name="SIFT_INTERNAL" class="ch.qos.logback.core.FileAppender"> <prudent>true</prudent> <file>${fname}.log</file> <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] %C:%L %msg%n</pattern> </encoder> </appender> </sift> </appender> What concerns me is that I don't seem to be able to override the MDCAdapter that logback uses for the sifting. The documentation says that the class="..." attribute should override the MDCAdapter implementation used. but it doesn't. No matter what I put in that class attribute, it always uses ch.qos.logback.classic.util.LogbackMDCAdapter I looked at the source for that MDCAdapter implementation and have confirmed that it does only use one value but that the MDCBasicAdapter from slf4j supports multiple keys. What is preventing me from using the better implementation from SLF4J? On 10/11/2013 05:35 AM, David Roussel wrote: - -- Cheers, Matt Young solid@youngdev.net http://youngdev.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJSWGNbAAoJEO5jycTTPEzccQEP/29NN/dUMkxhik0ya+w9sebW SOEZMQvfltWEEuf+tCLR/dfaVobvPDq6tMHtE5vV+p0Eve/RLaoxBemiDr/Lp14i AfAgDn5h+LFNMpGsL9QwiOJnM/uVn/yefiwTc4yeRfNTgF/aR52i6EVyRLy3b4fN jfkieohJ0BftXhUuLWpBcdDJUiIYK6w9YLrK1Hu5/LgCmmYcQPramddDsv1mrTGm /NicfKMiMriSALL2kRJY+/v2mnWmSzTWprXA30k9WM0q0cKWDQJuhqCnuU8CQ22M 3VablhdkuZE+tSMmcAcm0T6lp8fBtfvIM8d5G4vXAVcHx4c6yx96txUjgz2yAFdg 03/ge5YBVux2qWdfY+9jNbDWpKyOzb5MZ8X/VWbmAr0uSuIyoJUo76HFTH2hq8mn 5JfNmLhTNJiLp0qMFpSmaarw20ligO1PRn4N2EqAGlNUoGG43wnyMn+inGxJjVmJ cHN26KpetRHAFj5lJ/ggfP2Khr8Fn637yoEyzmtB6PQPTmj0RFZkz8DjBxIRDETU tw/VYfC+VtJyzaNG1JtfDOjErbA6VpywpzHhrklB+jaQX1nGGDfzOsndmU13R8X/ b7WziN3+ptatd7ErcAecFeOR5sxTj3nI/qpYgilZmlfU68F+XA7foeCp1VPw8DqX m4w9WsFmFPrUUfuwZAfA =HuWJ -----END PGP SIGNATURE-----