logging into file

# Root logger option
log4j.rootLogger=ERROR, file

# Direct log messages to file
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=Error.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n