java - Tomcat server is not starting if i make changes in server.xml in conf folder -

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whenever changed server.xml mysql properties tomcat server blinking , stopping how solve issue

<realm     classname="org.apache.catalina.realm.jdbcrealm"    drivername="com.mysql.jdbc.driver"    connectionurl="jdbc:mysql://localhost:3306/test?user=root;password=root"     usertable="users"     usernamecol="user_name"     usercredcol="user_pass"     userroletable="user_roles"     rolenamecol="role_name"/>

without more information, issue can see connectionurl wrong, url parameters separated &, html encoding &amp;:

<realm        classname="org.apache.catalina.realm.jdbcrealm"       drivername="com.mysql.jdbc.driver"       connectionurl="jdbc:mysql://localhost:3306/test?user=root&amp;password=root"                   usertable="users"       usernamecol="user_name"        usercredcol="user_pass"       userroletable="user_roles"        rolenamecol="role_name"/>

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