Can not install Appian Server

<?xml version="1.0" encoding="UTF-8"?>
<datasources xmlns="http://www.jboss.org/ironjacamar/schema">
  <!-- System Datasource -->
  <xa-datasource 
      jndi-name=jdbc/AppianDS 
      pool-name="MySqlDS"
      enabled="true" 
      use-java-context="false">
    <xa-datasource-property name="URL">jdbc:mysql://localhost:3306/appian_ds?useOldAliasMetadataBehavior=true</xa-datasource-property>
    <xa-datasource-property name="useUnicode">true</xa-datasource-property>
    <xa-datasource-property name="characterEncoding">UTF-8</xa-datasource-property>
    <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class>
    <driver>com.mysql.jdbc</driver>
    <security>
      <security-domain>ds-name-security-primary</security-domain>
    </security>
    <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
    <xa-pool>
      <min-pool-size>5</min-pool-size>
      <max-pool-size>100</max-pool-size>
    </xa-pool>
    <timeout>
      <blocking-timeout-millis>5000</blocking-timeout-millis>
      <idle-timeout-minutes>5</idle-timeout-minutes>
    </timeout>
  </xa-datasource>
</datasources>