[ http://jira.qos.ch/browse/LBCLASSIC-170?page=com.atlassian.jira.plugin.syste... ] Ceki Gulcu resolved LBCLASSIC-170. ---------------------------------- Fix Version/s: 0.9.19 Resolution: Fixed
DbAppender discards all exception' details ------------------------------------------
Key: LBCLASSIC-170 URL: http://jira.qos.ch/browse/LBCLASSIC-170 Project: logback-classic Issue Type: Bug Components: appender Affects Versions: 0.9.18 Reporter: Tomasz Nurkiewicz Assignee: Ceki Gulcu Fix For: 0.9.19
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.
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