Develop Reference

Tomcat 8.5.50 the ErrorReportValve is not working

Switching from apache-tomcat-8.5.23 to apache-tomcat-8.5.50 configuring the ErrorReportValve is not working.
I have set below in 8.5.23 and it worked ( Tomcat does not show server info or error).
<Valve className="org.apache.catalina.valves.ErrorReportValve" showReport="false" showServerInfo="false" />
After upgrade to 8.5.50 the tomcat shows server info and report, even I have set it to false
This is the sample stack trace and server info which is shown by Tomcat
Any comments?

You should set the configuration on the <Host> section in file server.xml.
<Host autoDeploy="false" appBase="webapps" name="localhost" unpackWARs="false">
<Valve className="org.apache.catalina.valves.ErrorReportValve" showReport="false" showServerInfo="false"/>
.
.
.
</Host>
Extracted from this reference.

Setup Tomcat for multiple websites in one server (linux)

I know this question might be similar to others, however, I haven't been able to solve this.
I have a server with 25 websites, all of them uses Tomcat. I'm migrating to a new server which has Tomcat 8 (the regular version), whereas the old server uses "CPanel's easy tomcat".
I started migrating one website, which is now running on the new server, however, when a JSP is called from the browser, the browser shows the JSP code instead of executing it.
In my old server, I had to execute a feature from CPanel's easy-tomcat called "install servlets", which I really don't know what it does, however, after executing that, Tomcat would execute JSP's.
Now, in my new server, accordgin to what I've read, I've added this to the %CATALINA_HOME%/conf/server.xml file, inside the <Engine></Engine> tags (which I also had to include in my old server):
<Host name="mydomain.com" appBase="/home/myAccName/public_html/">
<Context path="" reloadable="false" docBase="/home/myAccName/public_html" />
</Host>
As you can see, the application is not located under %CATALINA_HOME%/webapps/ directory, and that's the way I need it to be.
What am I missing?
Any help will be really appreciated
I'm using Tomcat 8, EasyApache 4 and CentOS 7.6

check that the following in in your tomcat/conf.web.xml file
<!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
<Listener className="org.apache.catalina.core.JasperListener" />

You can create VirtualHosts to setup multiple websites with multiple domain names in one server. You can try out same in tomcat 7, 8 and in 9 as well.
1.Edit your relevant server.xml file and include Virtual hosts as below.
Make sure to restart your tomcat server for the applied changes to take effect.
<Host name="example.com" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Alias>www.example.com</Alias>
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="example_access_log" suffix=".txt"
pattern="%h %l %u %t %r %s %b" />
<Context path="" docBase="/opt/tomcat/webapps/myapp1"
debug="0" reloadable="true"/>
</Host>
<Host name="mydomain.org" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Alias>www.mydomain.org</Alias>
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="mydomain_access_log" suffix=".txt"
pattern="%h %l %u %t %r %s %b" />
<Context path="" docBase="/opt/tomcat/webapps/myapp2"
debug="0" reloadable="true"/>
</Host>
Explanation
For example.com domain, /opt/tomcat/webapps/myapp1 is the document root (for your web 1).
For mydomain.org domain, /opt/tomcat/webapps/myapp2 is the document root(for your web 1).

This is the way I managed to solve this. I don't know if it's the best way, but it works. Just follow the next 3 steps:
1)
In %CATALINA_HOME%/conf/server.xml:
<Host name="mydomain.com" appBase="webapps" autoDeploy="false" unpackWARs="false"></Host>
2)
Then I had to add a file:
%CATALINA_HOME%/conf/mydomain.com/ROOT.xml
<Context displayName="My Website 1" docBase="/home/accountfolder/public_html" reloadable="true">
<Resource
name="jdbc/rhwebDB"
.
.
.
(database connection info, optional)
/>
</Context>
Then on the Apache side, I had to configure the mod_proxy_ajp connector
I've edited the file:
3)
/etc/apache2/conf.d/userdata/std/2/accountfolder/mydomain.com/cp_jkmount.conf
<IfModule mod_jk.c>
JkMount /*.jsp ajp13
JkMount /servlet/* ajp13
JkMount /servlets/* ajp13
</IfModule>
<IfModule mod_proxy_ajp.c>
ProxyRequests Off
<Proxy *>
AddDefaultCharset Off
Order deny,allow
Allow from all
</Proxy>
ProxyPass / ajp://mydomain.com:8009/
ProxyPassReverse / ajp://mydomain.com:8009/
My application/website is located on /home/accountfolder/public_html/ and there's nothing on the %CATALINA_HOME%/webapps/ directory. For me this is better since I can upload a jsp or whatever directly where the app is located using a FTP user.
If you have any trouble, check the folder permissions and owners in your /home/accountfolder/public_html/ directory, Tomcat needs permissions for reading/executing etc. A Tomcat's 404 error will be shown if Tomcat can't access those files & folders.
As I mentioned in this post, my app is "exploded" (if that's the correct term), I mean, it's NOT packed in a WAR file.

Duplication server name in URL

I have a trouble with configure of Apache and Tomcat. My purpose is to get ability to adress to tui.org/servlet, when tui.org is my virtual host configured on local machine and /servlet/ is url-pattern which is defined at web.xml. But instead the servelet I get 404 Not Found by Tomcat but I can to adress to my server by tui.org/tui.org/servlet - it works. Structure of files on my server is the following:
Root: /var/www/tui.org
-------->/WEB-INF/classes/a
-------->/WEB-INF/classes/a/MainServlet.class
-------->/WEB-INF/web.xml
-------->/index.html
How can I achieve this behaviour?
web.xml:
<servlet-mapping>
<servlet-name>mainServlet</servlet-name>
<url-pattern>/servlet</url-pattern>
</servlet-mapping>
My server.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Server port="8005" shutdown="SHUTDOWN">
<Listener className="org.apache.catalina.startup.VersionLoggerListener" />
<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
<Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
<GlobalNamingResources>
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>
<Service name="Catalina">
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<Engine name="Catalina" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.LockOutRealm">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost" appBase="/var/www/"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log" suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
</Engine>
</Service>
</Server>
Configuration of tui.org (tui.org.conf at /etc/apache2/sites-available:
<VirtualHost *:80>
ServerName tui.org
DocumentRoot /var/www/tui.org
<Directory /var/www/tui.org>
AllowOverride All
Require all granted
</Directory>
JkMount /servlet* ajp13_worker
</VirtualHost>
I use Apache2, tomcat9 and Ubuntu 18.04.
Thank you in advance!
P.S. Sorry for my english.

There are several issues here:
You must not serve the web application directory with Apache - e.g. you're declaring DocumentRoot /var/www/tui.org for Apache and <Host appBase="/var/www/"> for Tomcat.
e.g but not limited to: The servlet spec specifically disallows to serve the directory WEB-INF to ever be served to a client, and you're explicitly bypassing this limitation.
An application deployed in a Host's appBase is always deployed under that name (unless specified differently in a context.xml file). The only other exception to that rule is if a directory is called ROOT - in that case, it's deployed without a name, thus omitting the tui.org that follows your server name.
but this is secondary to the issue of serving the whole webapp through Apache httpd. Fix that one first.
One way to fix your biggest problem is to omit the DocumentRoot directive in Apache and rather serve everything from Tomcat: JkMount * ajp13_worker.

For solving problem with adressing by tui.org/servlet I had to add <Context> directive to server.xml:
<Context path="" docBase="/var/www/tui.org/"/>
and change appBase from /var/www/ to /var/www/tui.org/.
And for fix problem with access to WEB-INF (thanks to #OlafKock) I had to add next to tui.org.conf:
<Directory /var/www/tui.org>
AllowOverride All
Deny from all
</Directory>

Virtual host Tomcat 7.0

I'm using Tomcat 7.I have my domain which pointed to qlhd.viweb.vn.Now I have some problem when I try to access my domain through internet. It always redirect to tomcat host manager page not my page. If I want to access my page I have to go through this http://qlhd.viweb.vn/CMS link.
I researched Google and add it to my server.xml
<Host name="www.qlhd.viweb.vn" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
</Host>

where/how to setup configuration resources for Tomcat .war files

I have a source tree for a .war file that I need to modify so that I can add some application-specific configuration info (in this case a jdbc connection string, but I may have other properties-like resources). What are the best practices for where to put configuration info and how to access this from within the Servlet?
I'm guessing this Tomcat configuration reference has something to do with it, but my eyes glaze over when I try to read it.

For web app configuration you can place the config on the classpath somewhere. Then you can get to it from your application with getResourceAsStream or if you prefer Spring:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:my-config.properties</value>
</list>
</property>
</bean>
There are a number of places you can put the properties on the classpath in Tomcat. in order it looks at:
/WEB-INF/classes of your web application
/WEB-INF/lib/*. jar of your web application
$CATALINA_HOME/common/classes
$CATALINA_HOME/common/endorsed/*.jar
$CATALINA_HOME/common/i18n/*.jar
$CATALINA_HOME/common/lib / *. jar
$CATALINA_BASE/shared/classes
$CATALINA_BASE/shared/lib/*.jar
For example, if you put my-config.properties both in a .jar file and in WEB-INF/classes the one in WEB-INF/classes will be used. You could use this mechanism to default to test config and override prod config on prod servers.

For the specific case of a JDBC connection string, I would recommend using a Tomcat-managed connection pool instead. You can read more about doing this here:
http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html
It's more work, but I think in the long run it will serve you better.

Hmm. It looks like the easiest path to getting what I want on the Java side of the application is to use Servlet.getServletConfig().getInitParameter(parameterName) e.g. getInitParameter("myApp.connectionString");
But I don't know where to set this. The Tomcat docs talk about various permutations of context.xml but I want to make sure this parameter only affects my servlet and not any others. I also don't want to locate it within my .war file so that I can keep this parameter independent of the applications (for instance if I install an upgrade).
Update: I figured it out, key/value parameters accessible by ServletContext.getInitParameter() go here (or can go here) in ${CATALINA_HOME}/conf/server.xml:
<Server port=... >
...
<Service name="Catalina" ...>
<Engine name="Catalina" ...>
...
<Host name="localhost" ...>
<Context path="/myWarFile">
<Parameter name="foo" value="123" />
<Parameter name="bar" value="456" />
...
</Context>
</Host>
</Engine>
</Service>
</Server>
This sets two parameters, "foo" = "123", "bar" = "456" for the servlet myWarFile.war (or more accurately with the URL path /myWarFile) and I can get at them in Java with Servlet.getServletConfig().getInitParameter("foo") or Servlet.getServletConfig().getInitParameter("bar").
I also looked at JIRA's server.xml entry (and what they tell you to set it to for MySQL), they use a Resource rather than a Parameter, not quite sure of the subtleties of this but it seems like it could be more appropriate method.
<Server port=... >
<Service name="Catalina" ...>
<Engine name="Catalina" ...>
<Host name="localhost" ...>
<Context path="/jira" docBase="${catalina.home}/atlassian-jira"
reloadable="false">
<Resource name="jdbc/JiraDS" auth="Container" type="javax.sql.DataSource"
username="jirauser"
password="..."
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost/jiradb1?autoReconnect=true&useUnicode=true&characterEncoding=UTF8"
maxActive="20"
validationQuery="select 1"
/>
</Context>
</Host>
</Engine>
</Service>
</Server>

you can add the path to your properties files in your CATALINA_HOME/conf/catalina.properties in the "common" classloader common.loader.