NullPointerException in Priority.isGreaterOrEqual

[EdoD <e3...@yahoo.com>]

I'm getting NPE from time to time when I try to log a TRACE message.
in log4j.xml I've defined the levels like this:

 <logger name="com.traffix">
        <level value="ALL"/>
 </logger>

and I'm using a Logger named "com.traffix.session.Session"

The problem is that Category.getEffectiveLevel() method sometime returns
null which causes the NPE below, but I don't understand how it can happen
because it iterates on the parent loggers until it finds a defined level.

The stack trace:

java.lang.NullPointerException
        at org.apache.log4j.Priority.isGreaterOrEqual(Priority.java:123)
        at org.apache.log4j.Category.isEnabledFor(Category.java:751)
        at
com.traffix.openblox.core.utils.logging.LoggingUtils.isLoggable(LoggingUtils.java:169)
        at
com.traffix.openblox.core.utils.logging.LoggingUtils.doLog(LoggingUtils.java:306) 

Any idea?

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