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  1. logback
  2. LOGBACK-352

strange MDC and SMTPAppender behavior

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.9.14
    • Fix Version/s: 0.9.15
    • Component/s: None
    • Labels:
      None

      Description

      Original report: http://www.qos.ch/pipermail/logback-user/2009-January/000877.html

      I'm seeing unexpected behavior when I combine MDC and SMTPAppender.
      The MDC values appear to be lost for previous log messages when
      MDC.clear is called before Logger.error triggers the actual email.
      This does not appear to be a problem with console appender. Below
      is a test program that will reproduce the problem. A logback.xml
      that uses an SMTPAppender and a pattern that includes %mdc is required.

      Is there something I'm missing?

      Versions:

      slf4j-api-1.5.6.jar
      logback-core-0.9.14.jar
      logback-classic-0.9.14.jar
      janino-2.5.14.jar
      mail-1.4.1.jar

      java version "1.6.0_04"

      test program:

      import org.slf4j.Logger;
      import org.slf4j.MDC;
      import org.slf4j.LoggerFactory;

      public class TestMain
      {

      public static void main(String[] args)

      { Logger logger = LoggerFactory.getLogger("TestMain"); // test1... logger.debug("test1: should not have MDC"); MDC.put("key1", "val1"); MDC.put("key2", "val2"); logger.warn("test1: should have MDC(key1=val1,key2=val2) but does not"); MDC.clear(); logger.debug("test1: should not have MDC"); logger.error("test1: error message triggers email"); // test2... logger.debug("test2: should not have MDC"); MDC.put("key1", "val1"); logger.warn("test2: should have MDC(key1=val1)"); MDC.put("key2", "val2"); logger.warn("test2: should have MDC(key1=val1,key2=val2)"); MDC.put("key3", "val3"); logger.warn("test2: should have MDC(key1=val1,key2=val2,key3=val3) but does not"); MDC.clear(); logger.debug("test2: should not have MDC"); logger.error("test2: error message triggers email"); // test3... logger.debug("test3: should not have MDC"); MDC.put("key1", "val1"); logger.warn("test3: should have MDC(key1=val1)"); MDC.put("key2", "val2"); logger.warn("test3: should have MDC(key1=val1,key2=val2)"); MDC.put("key3", "val3"); logger.warn("test3: should have MDC(key1=val1,key2=val2,key3=val3)"); MDC.put("key4", "val4"); logger.warn("test3: should have MDC(key1=val1,key2=val2,key3=val3,key4=val4) but does not"); MDC.clear(); logger.debug("test3: should not have MDC"); logger.error("test3: error message triggers email"); // test4... logger.debug("test4: should not have MDC"); MDC.put("key1", "val1"); logger.warn("test4: should have MDC(key1=val1)"); MDC.put("key2", "val2"); logger.error("test4: error message triggers email and has MDC(key1=val1,key2=val2)"); MDC.clear(); logger.debug("test5: should not have MDC"); MDC.put("key1", "val1"); logger.warn("test5: should have MDC(key1=val1) but does not"); MDC.clear(); logger.debug("test5: should not have MDC"); MDC.put("key1", "val1"); logger.warn("test5: should have MDC(key1=val1)"); logger.error("test5: error message triggers email and should not have MDC"); }

      }

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            • Assignee:
              ceki Ceki Gülcü
              Reporter:
              ceki Ceki Gülcü
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              • Created:
                Updated:
                Resolved: