how do I turn off logging in java c3p0 connection pooling lib?

Question

hey all, I\'m just getting started with c3p0 for database connection pooling. It\'s attaching itself to my log4j output currently. How do I set logging off or at least to SE

Answer 1

I was getting messages like the following:

Tue Feb 12 13:42:01 EST 2013 INFO: Profiler Event: [FETCH]  at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76) duration: 0 ms, connection-id: 67, statement-id: 23, resultset-id: 27

This made me think that C3P0 was logging these messages. Actually the message is coming from the mysql connector because I enabled profiling by using a connection string like this:

jdbc:mysql://localhost/database?profileSQL=true

Remove ?profileSQL=true to make it stop logging these messages.

Answer 2

You can set log level by adding following lines in log4j.xml Logging at least at Error level is desired.

< category name="com.mchange" additivity="false"> 
        < priority value="ERROR"/>
        < appender-ref ref="ASYNC"/>
     </ category>

If you really want to turn off c3P0 logging set property com.mchange.v2.log.FallbackMLog.DEFAULT_CUTOFF_LEVEL=OFF

in c3p0-Config.properties

or you can directly set this in code as an System property System.setProperty("com.mchange.v2.log.FallbackMLog.DEFAULT_CUTOFF_LEVEL",MLevel.OFF);

Answer 3

I fixed problem with line of code:

com.mchange.v2.log.MLog.getLogger().setLevel(MLevel.INFO);

I am using log4j in my app.

Answer 4

For those who are NOT using a configuration file, just to add the following in the code, before loading the connection pool.

Properties p = new Properties(System.getProperties());
p.put("com.mchange.v2.log.MLog", "com.mchange.v2.log.FallbackMLog");
p.put("com.mchange.v2.log.FallbackMLog.DEFAULT_CUTOFF_LEVEL", "OFF"); // Off or any other level
System.setProperties(p);

Answer 5

If you use a log4j.xml file you can simple define a logger for the c3po package:

<logger name="com.mchange.v2.c3p0">
    <level value="SEVERE"/>
</logger>

There are analogous methods for log4j.properties. I think it's just:

log4j.logger.com.mchange.v2.c3p0=SEVERE

Answer 6

I am working on clojure, through korma and for the life of my I could not get any properties files to load (I am new to clojure so I blame myself). If you are in a similar boat, the following might help you out.

(System/setProperties 
  (doto (java.util.Properties. (System/getProperties))
    (.put "com.mchange.v2.log.MLog" "com.mchange.v2.log.FallbackMLog")
    (.put "com.mchange.v2.log.FallbackMLog.DEFAULT_CUTOFF_LEVEL" "OFF")))

The is basically a clojure port of Philippe Carriere's answer above, thank you so much!