linux log4j相关问题

linxu前台运行程序
$sh xxx.sh
起来以后只打印如下：
java version "1.6.0_11"
Java(TM) SE Runtime Environment (build 1.6.0_11-b03)
Java HotSpot(TM) 64-Bit Server VM (build 11.0-b16, mixed mode)
后面就是前台运行程序，中断在这里了
我的log4j配置如下：
### set log levels
log4j.rootLogger=debug, stdout, logfile
log4j.logger.com.xx=info, SYSINFOlog4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=DEBUG 
log4j.appender.stdout.Target=System.out 
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %5p %c{1}:%L - <%m>%nlog4j.appender.logfile=org.apache.log4j.RollingFileAppender
log4j.appender.logfile.File=log/fas.log
log4j.appender.logfile.MaxFileSize=10240KB
# Keep three backup files.
log4j.appender.logfile.MaxBackupIndex=10
# Pattern to output: date priority [category] - message
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %5p [%10t] %c{1}:%L - %m%n#log4j.appender.SYSINFO.Threshold=info
log4j.appender.SYSINFO=org.apache.log4j.RollingFileAppender
log4j.appender.SYSINFO.File=log/sysinfo.log
log4j.appender.SYSINFO.MaxFileSize=10240KB
log4j.appender.SYSINFO.MaxBackupIndex=5
log4j.appender.SYSINFO.layout=org.apache.log4j.PatternLayout
log4j.appender.SYSINFO.layout.ConversionPattern=%d{ISO8601} %5p [%10t] %c{1}:%L - %m%n#log4j.appender.SYSINFO.Threshold=info
log4j.appender.DEBUGLOG=org.apache.log4j.RollingFileAppender
log4j.appender.DEBUGLOG.File=log/debuglog.log
log4j.appender.DEBUGLOG.MaxFileSize=10240KB
log4j.appender.DEBUGLOG.MaxBackupIndex=5
log4j.appender.DEBUGLOG.layout=org.apache.log4j.PatternLayout
log4j.appender.DEBUGLOG.layout.ConversionPattern=%d{ISO8601} %5p [%10t] %c{1}:%L - %m%n
前台无打印信息，文件日志了里是正常的，打印的内容都在日志上
请哪位大虾帮忙解决下，前台为啥不打印