We compiled our web application code using Ant and Tomcat 9.0.11. When JSPs are complied, servlet mapping entries added to web.xml is malformed. 

This bug is not reproduced in Windows. 
This bug is not reproduced when Tomcat 9.0.8 is used. 
This bug is occurring in Linux with Tomcat 9.0.10 or Tomcat 9.0.11. 

Below is the malformed entries in Web.XML 

<servlet-mapping>
        <servlet-name>
    <servlet-mapping>
        <servlet-name>org.apache.jsp.com.core.test.ListMembers_jsporg.apache.jsp.com.test.reports.ReportsBody_jsp</servlet-name>
        <url-pattern></servlet-name>
        <url-pattern>/com/test/ListMembers.jsp</url-pattern>
    </servlet-mapping>
/com/test/reports/ReportsStatus.jsp</url-pattern>
    </servlet-mapping>