[logback-dev] [JIRA] Created: (LBCLASSIC-271) DBAppender merging properties

Bryan Ward (JIRA) noreply-jira at qos.ch
Fri May 27 12:58:51 CEST 2011

DBAppender merging properties

                 Key: LBCLASSIC-271
                 URL: http://jira.qos.ch/browse/LBCLASSIC-271
             Project: logback-classic
          Issue Type: Bug
          Components: appender
    Affects Versions: 0.9.29
         Environment: ubuntu linux 11.04, java 16, intel processor
            Reporter: Bryan Ward
            Assignee: Logback dev list
            Priority: Minor

I'm using the DBAppender and the MDC to log certain elements of the
requests into our application.

I've noticed that besides just the elements that I've put in the MDC,
all of the system properties are also being logged to the
logging_event_property table.  This has caused many concerns because
there are certain system properties that should not be logged.

Here is my DB Appender configuration

<appender name="DB" class="ch.qos.logback.classic.db.DBAppender">
           <dataSource class="com.mchange.v2.c3p0.ComboPooledDataSource">
           <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %X %ex{short}
- %n</pattern>

Note that the properties for username / password / etc are pulled in
from another file using the

<property file="_path_to_file/conf.properties" />

All the properties in the external file are being logged which contain
passwords etc that do not belong in the logging_event_property table.


At present time, DBAppender merges properties "defined in the context***" as well as those properties defined in the current MDC into a single map and then persists that map on the database. There is no configuration setting to change that behavior.

***Any property defined during configuration is "defined in the context" and lives as long as the applications or is changed.

I think that it would be possible to solve the issue you are facing by separating properties which should live during logback configuration (and then cease to exists) and properties which should live as long as the application.

In any case, the problem you describe needs to be fixed. Could you please enter a bug report?

Thank you,

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