Access Log file getting updated with a blank line in JBoss EAP 6

Issue

• When we access application I am getting a blank line inserted into access log file.
• Empty access log is created with below configuration:

<subsystem xmlns="urn:jboss:domain:web:1.2" default-virtual-server="default-host" native="false">
 . . . 
   <access-log pattern="%T %t %m %U %s %b %a" resolve-hosts="true" extended="true" rotate="false"/>
 </subsystem>