I am using log4j with tomcat. When I log exceptions in my JSPs, servlets:

```
private Logger _log = Logger.getLogger(this.getClass());
...
try{...} catch (Exception e) {
    _log.error("Error refreshing all prices", e);
}

```

I only get the first line of the exception, without a stacktrace. 

> 
> 17-Feb 17:37:45 ERROR AutoContrib:175 - Exception while publishing csv file:
>  java.lang.ArrayIndexOutOfBoundsException
> 
> 
> 

Not very helpful at all!

My log4j.properties file (/tomcat/common/classes/log4j.properties) looks like this:

```
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{dd-MMM HH:mm:ss} %5p %c{1}:%L - %m%n
log4j.appender.stdout.threshold=info

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.maxFileSize=5000KB
log4j.appender.file.maxBackupIndex=10
log4j.appender.file.File=${catalina.home}/logs/web.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{dd-MMM HH:mm:ss} %5p %c{1}:%L - %m%n
log4j.appender.file.threshold=info

log4j.rootLogger=debug, stdout, file

```