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http://jira.qos.ch/browse/LBCLASSIC-213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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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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