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  1. logback
  2. LOGBACK-385

DbAppender discards all exception' details


    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.9.18
    • Fix Version/s: 0.9.19
    • Component/s: logback-classic
    • Labels:


      DbAppender uses a single table logging_event_exception to persist stack traces, inserting one row per each stack frame. Also, each row has its parent event id. Unfortunately this approach loses a lot of exception details, making it unable to fully recreate ILoggingEvent instance that was logged by the DbAppender. List of attributes that are missing:

      • exception message
      • exception class name
      • exception root cause

      Also logging_event_exception saves the result of ch.qos.logback.classic.spi.StackTraceElementProxy#toString (which refers to java.lang.StackTraceElement#toString) instead of saving each element of java.lang.StackTraceElement separately. Now, in order to recreate StackTraceElement instance one must parse (probably using regular expression) string saved in trace_line attribute.

      My suggestion would be to create two tables:

      • logging_event_throwable with columns: message, class_name and cause foreign key referencing other logging_event_throwable instance
      • logging_event_stack_frame with columns: class_name, method, file, line and a foreign key referencing logging_event_throwable + indexing column

      Also logging_event would have a optional foreign key to logging_event_throwable.

      This modifications in database schema would allow to fully recreate ILoggingEvent. For backward compatibility ch.qos.logback.classic.db.DBAppender should remain untouched. The idea is to subclass it and override ch.qos.logback.classic.db.DBAppender#insertThrowable.




            • Assignee:
              ceki Ceki Gülcü
              nurkiewicz Tomasz Nurkiewicz
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