[ http://jira.qos.ch/browse/LBCLASSIC-213?page=com.atlassian.jira.plugin.syste... ] Ceki Gulcu resolved LBCLASSIC-213. ---------------------------------- Fix Version/s: 0.9.23 Resolution: Fixed Thank you for this report. The issue has been solved in release 0.9.23.

SiftingAppenders MDCBasedDiscriminator does not support deferred processing of LoggingEvents --------------------------------------------------------------------------------------------

Key: LBCLASSIC-213 URL: http://jira.qos.ch/browse/LBCLASSIC-213 Project: logback-classic Issue Type: Bug Components: appender Affects Versions: 0.9.21 Reporter: Torsten Juergeleit Assignee: Ceki Gulcu Fix For: 0.9.23

In MDCBasedDiscriminator.getDiscriminatingValue() the MDC of the current thread is referenced: public String getDiscriminatingValue(ILoggingEvent event) { String mdcValue = MDC.get(key); if (mdcValue == null) { return defaultValue; } else { return mdcValue; } } This doesn't work is the logging events are serialized and processed in a different thread or JVM. Instead using SLF4Js MDC class why not using ILoggingEvent.getMdc() to access the MDC or a serialized version of it? Maybe something like this: public String getDiscriminatingValue(ILoggingEvent event) { if (event != null) { String mdcValue = event.getMdc().get(getKey()); if (mdcValue != null) { return mdcValue; } } return getDefaultValue(); } Right now we have to workaround this by creating our own version of DeferedMDCBasedDiscriminator :-( Some like this: public class DeferedMDCBasedDiscriminator extends MDCBasedDiscriminator { public String getDiscriminatingValue(ILoggingEvent event) { if (event != null) { String mdcValue = event.getMdc().get(getKey()); if (mdcValue != null) { return mdcValue; } } return getDefaultValue(); } }

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