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Need to deploy the same app to multiple contexts, each with a different database Tomcat7

How to deploy the same application to multiple contexts, each with a different database.
Using Tomcat7.0.54. We have 3 different environments like Development, Quality, Production. All the 3 environments have 3 different database configurations.
Normally apache-tomcat-7.0.54\conf\context.xml file. Sample D config.
<!-- Default set of monitored resources -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->
<!-- Uncomment this to enable Comet connection tacking (provides events
on session expiration as well as webapp lifecycle) -->
<!--
<Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
-->
<Resource name="java:jboss/datasources/letterDatasource"
auth="Container"
type="javax.sql.DataSource"
username="admin"
password="admin"
driverClassName="oracle.jdbc.OracleDriver"
url="xxx xxxx xxxxx xx"
maxActive="8"
maxIdle="4"/>
How to do the above programmatically or efficiently instead of changing in every server context.xml file.?
i am not using spring. just normal web application using seam 2.3 with jsf and richfaces.
Thank you.

Keep your data base properties in an environment.property file, which will be different for each stage. Specified environment will take their specific environmental properties.

Apache Tomcat Load Balancing Cluster

I am having 3 servers installed with Ubuntu and I want to configure Tomcat Load Balancing.
Server A = 10.0.0.1,
Server B = 10.0.0.2,
Server C = 10.0.0.3
I have pointed Domain to Server A which is having Apache and Mod_JK installed. while Server B and C is having Apache Tomcat 8. below is the Details of my workers.properties file
workers.apache_log=/var/log/apache2 worker.list=tomcatlb,status
worker.stat1.type=status
worker.tomcat1.type=ajp13 worker.tomcat1.host=10.0.0.2 #put your app
host here worker.tomcat1.port=8009 worker.tomcat2.type=ajp13
worker.tomcat2.host=10.0.0.3 worker.tomcat2.port=8009
worker.tomcat1.lbfactor=1 worker.tomcat2.lbfactor=1
worker.tomcatlb.type=lb
worker.tomcatlb.balance_workers=tomcat1,tomcat2
worker.list=jkstatus worker.jkstatus.type=status
I have also used jvmRounte name as tomcat1 and tomcat2 in server.xml of both the Apache Tomcat.
i have also added below lines in server.xml
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2">
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="6">
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService"
address="228.0.0.4"
port="45564" frequency="500"
dropTime="3000"/>
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="auto" port="4001" autoBind="100"
selectorTimeout="5000" maxThreads="6"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interc eptor"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
</Channel>
context.xml is like below
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!-- The contents of this file will be loaded for each web application -->
<Context>
<!-- Default set of monitored resources. If one of these changes, the -->
<!-- web application will be reloaded. -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->
<!-- Uncomment this to enable Comet connection tacking (provides events
on session expiration as well as webapp lifecycle) -->
<!--
<Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
-->
<Manager className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Manager className="org.apache.catalina.ha.session.BackupManager" />
</Context>
apache configuration is having below lines
RewriteEngine on
RewriteRule ^/$ /test [PT,L]
JkMount /* tomcatlb
apache is redirecting the request to Tomcat via mod_jk and its working fine but when one tomcat goes down it should redirect the request to the other tomcat instead of that I have to do relogin as its not replicating the session.

I'm seeing that you're missing
stickysession=JSESSIONID|jsessionid lbmethod=byrequests nofailover=Off connectiontimeout=5 timeout=30

Just to be sure: These are actually separate lines:
worker.tomcat1.type=ajp13 worker.tomcat1.host=10.0.0.2

Besides: Is it intentional, that 10.0.0.1 is missing in your worker properties?

How to specify root url tomcat?

for example app.war. I want to change root url for ruuning program on it.
I am absolutely confused. I tried out to specify root url in context.xml(in my app folder, and I've tried to add ROOT.xml. But it doesn't work(in general, I don't know where I make mistake of changing parametrs, I've looked over all tips. If i change in /web-inf context.xml, then tomcat removes all changing. Tomcat doesn't see ROOT.xml in specific folder. Please, may be someone can write more explicitly these steps and explain some things, which happened with me preventing my Tomcat from working correctly.
this is C:\Users\user\Desktop\psc\ProductCatalog\psc-ui\target\tomcat\conf\context.xml below
<Context>
<!-- Default set of monitored resources -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->
<!-- Uncomment this to enable Comet connection tacking (provides events
on session expiration as well as webapp lifecycle) -->
<!--
<Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
-->
<Environment name="SQL.log" value="DEBUG" type="java.lang.String"/>
this is C:\Users\Alexander.Luchko\Desktop\psc\ProductCatalog\psc-ui\target\ProductCatalog\META-INF\context.xml below
<Context>
<Parameter name="javax.faces.PROJECT_STAGE" value="Production" override="false"/>
........
<Resource ....
sorry for my bad english! in advance

Tomcat Native Clustering Apache geronimo 3.0.1 not working

I have two linux machines with geronimo 3.0.1 running on them.
My requirement is to cluster the application and do an automatic deployment/un-deployment on other machine once an application is deployed on any machine.
For this I have configured Tomcat Native clustering in Apache geronimo 3.0.1 with following configuration on both servers.
<Host name="${ServerHostname}" appBase=""
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Cluster channelSendOptions="8" className="org.apache.catalina.ha.tcp.SimpleTcpCluster">
<Manager channelSendOptions="6" className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" mapSendOptions="6" name="cluster1" notifyListenersOnReplication="true"/>
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership address="228.0.0.4" className="org.apache.catalina.tribes.membership.McastService" dropTime="3000" frequency="500" port="45564"/>
<Receiver address="auto" autoBind="100" className="org.apache.catalina.tribes.transport.nio.NioReceiver" maxThreads="6" port="4000" selectorTimeout="5000"/>
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor className="org.apache.geronimo.tomcat.interceptor.DisableMcastInterceptor"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector" interval="60"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">
<Member UniqueId="{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}" domain="mapp01" host="10.9.90.102" port="5002" securePort="-1"/>
</Interceptor>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
When I restarted server and deployed a war file on one server , the app was not clustered and deployed to other server automatically.In logs I found these two lines related to clustering
[TomcatModuleBuilder] No clustering builders configured: app will not be clustered
[DeltaManager] Manager [/Test]: skipping state transfer. No members active in cluster
group.
I didn't get any solution to these in apache forums and documentation.
Is there any solution available to this?

Setting property 'source' to 'org.eclipse.jst.jee.server:GestorContenidoWS' did not find a matching property. Try all the solutions

This is my first post here (but not the first time that I visit the page, I found a lot of solutions here), first of all, sorry for my english I will try to explain myself as best I can.
This question appears another time in this page, but I tried all the solutions that the people post and I still with this problem, well here we go.
I made a project on Eclipse(indigo) for launch like a WebService (I did it before with succes, is not my first time) and when I Run on Server(Tomcat7) all seems fine and the appears this Warning.
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:GestorContenidoWS' did not find a matching property.
Then appear in the Web perspective of Eclipse the page "HTTP 404". I'm telling this because I read in other post that this Warning is not a problem, but seems that it is for me (The project is also vinculated with a JPA Persistence).
.I found two solutions for make dissappear this Warning. First, go to Server Overview and select the option 'Publish module contexts to separate XML files' and then try to Run on server again, but didn't work.
The other option was, remove the project from the server from the Server View. Then run the project under the same server for recreated server.xml, but didn't work also.
Anybody can help me? Maybe the problem of this "HTTP 404 requested resource (/GestorContenidoWS/) is not available." is in another part or its because this Warning?"
The code of my server.xml (without comments) is this:
<?xml version="1.0" encoding="UTF-8"?>
--><Server port="8005" shutdown="SHUTDOWN">
<Listener SSLEngine="on" className="org.apache.catalina.core.AprLifecycleListener"/>
<Listener className="org.apache.catalina.core.JasperListener"/>
<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
<Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"/>
<GlobalNamingResources>
<Resource auth="Container" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory"name="UserDatabase" pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase"/>
</GlobalNamingResources>
<Service name="Catalina">
<Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1"redirectPort="8443"/>
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443"/>
<Engine defaultHost="localhost" name="Catalina">
<Realm className="org.apache.catalina.realm.LockOutRealm">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"resourceName="UserDatabase"/>
</Realm>
<Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" pattern="%h %l %u %t "%r" %s %b" prefix="localhost_access_log." suffix=".txt"/>
<Context docBase="GestorContenidoWS" path="/GestorContenidoWS" reloadable="true" source="org.eclipse.jst.jee.server:GestorContenidoWS"/></Host>
</Engine>
</Service>
Thank you

First of all this is a warning and not an error. So there is no need to worry too much about it. Basically it means, that Tomcat does not know what to do with the source attribute from context.
This source attribute is set by Eclipse (or to be more specific the Eclipse Web Tools Platform) to the server.xml file of Tomcat to match the running application to a project in workspace.
Tomcat generates a warning for every unknown markup in the server.xml (i.e. the source attribute) and this is the source of the warning. You can safely ignore it.

This is a warning and can be safely ignored. Tomcat or the Web container does not understand what to do with the property set by Eclipse

set contex-root
<property name="context-root" value="path" />
and http://localhost:8080/path
show your index file

Find server.xml. For example "C:\Dev\apache-tomcat-8.5.23\conf\server.xml"
Find your application in server.xml
<Context docBase="C:\Dev\apache-tomcat-8.5.23\wtpwebapps\SpringRestExample" path="/spring" reloadable="true" source="org.eclipse.jst.jee.server:SpringRestExample"/></Host>
Expected url http://localhost:8080/SpringRestExample/rest/emp/9999
But (path="/spring") instead (path="/SpringRestExample")
Therefore current url http://localhost:8080/spring/rest/emp/9999