Tomcat Quick Tips

Quick Links to:

How do I add new database Resource Definition (database connection) to Tomcat?

ANSWER:

• The Install Tomcat 7 instructions gives an example on how to add a new Resouce Definition to Tomcat.

Tomcat 7 manager fails when deploying a WAR file when using the AJP connector

When the Tomcat 7 manager tries to deploy a war file, it fails with the following error:

Feb 28, 2013 8:20:35 AM org.apache.coyote.ajp.AjpMessage processHeader
SEVERE: Invalid message received with signature 8192

ANSWER:
By default, the maximum packet size that can be process by the AJP connector is 8192 bytes.  Do the following to change the default:

1. Edit the Tomcat server.xml file located in the conf directory of your Tomcat installation.
2. Find the Connector entry (show below).

   <Connector port="8009" protocol="AJP/1.3" tomcatAuthentication="false" redirectPort="8443" address="127.0.0.1" maxPostSize="536870912" />
   

3. Add maxHttpHeaderSize="65536" and packetSize="65536" so that the Connector is as follows:

   <Connector port="8009" protocol="AJP/1.3" tomcatAuthentication="false" redirectPort="8443" address="127.0.0.1"  maxPostSize="536870912" maxHttpHeaderSize="65536" packetSize="65536" />
   

4. When you are satisfied with your changes, save your changes and restart your Tomcat server.

Tomcat 7 manager fails when deploying a WAR file larger than 50 MB.

• When the Tomcat 7 manager tries to deploy a war file that is larger that 50 MB, it fails with the following exception:

  HTTP Status 500 - 
  
  --------------------------------------------------------------------------------
  
  type Exception report
  
  message 
  
  description The server encountered an internal error () that prevented it from fulfilling this request.
  
  exception 
  
  java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (63475228) exceeds the configured maximum (52428800)
  	org.apache.catalina.connector.Request.parseParts(Request.java:2780)
  	org.apache.catalina.connector.Request.parseParameters(Request.java:3024)
  	org.apache.catalina.connector.Request.getParameter(Request.java:1139)
  	org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:382)
  	org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:163)
  	org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
  
  root cause 
  
  org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (63475228) exceeds the configured maximum (52428800)
  	org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:804)
  	org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:284)
  	org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:304)
  	org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:129)
  	org.apache.catalina.connector.Request.parseParts(Request.java:2718)
  	org.apache.catalina.connector.Request.parseParameters(Request.java:3024)
  	org.apache.catalina.connector.Request.getParameter(Request.java:1139)
  	org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:382)
  	org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:163)
  	org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
  
  note The full stack trace of the root cause is available in the Apache Tomcat/7.0.25 logs.
  

  ANSWER:
• By default, the maximum file size that can be uploaded by the Tomcat 7 manager is 52428800 bytes.  Do the following to change the default:
  1. Edit the web.xml of the Tomcat manager application.  You can find the web.xml file for the Tomcat manager application in the *webapps/manager/WEB-INF directory of your Tomcat installation.
  2. Find the <multipart-config> tag (show below) and increase the max-file-size and max-request-size (both initially set at 52428800) to something larger than the war file size you want to deploy.

     <multipart-config> 
         <max-file-size>52428800</max-file-size> 
         <max-request-size>52428800</max-request-size> 
         <file-size-threshold>0</file-size-threshold> 
     </multipart-config> 
     

  3. When you are satisfied with your changes, save your changes and restart your Tomcat server.

How do I block inbound connections on ports 8080 and 8443?

• Follow this link for instructions on how to block inbound connections for any TCP port.