Active development of JAMWiki has ceased, and bug fixes and support will be limited at best. If you are interested in taking over management of JAMWiki please send an email to the jamwiki-devel mailing list.


A beginner who really wants to get JAMWiki installed on Win XP, Tomcat 5.0.28, JDK 1.6, ORACLE 9.2.

My desperate post:

Hi there, I hope I'm posting this in the right place and I'm not missing something that is already documented but I am having a real issue installing JAMWiki. I'm a complete newbie (sorry). My system details are:

  • Windows XP
  • Tomcat 5.0.28
  • JDK 1.6.0
  • ORACLE 9.2

I download the jamiwiki-0.5.2.WAR file and place it in the webapps folder in my Tomcat directory. I then start the Tomcat service and the .war is made into a folder. I then navigate my browser (MSIE7) to http://localhost:8080/jamwiki and I am faced with the config screen. I then complete the details thus:

  • C:\Tomcat\Tomcat 5.0\webapps\jamwiki\WIKIFILES
  • External Database
  • oracle.jdbc.driver.OracleDriver
  • oracle
  • jdbc:oracle:thin:@
  • JAM
  • password
  • C:\Tomcat\Tomcat 5.0\webapps\jamwiki\DOCS
  • /DOCS/
  • administrator
  • password
  • password

I then click Save Changes and in red writing at the top of the screen I get a message saying: An unknown system error has occurred. The error message is: Failure while executing insert into jam_topic_version ( topic_version_id, topic_id, edit_comment, version_content, wiki_user_id, edit_type, wiki_user_ip_address, edit_date, previous_topic_version_id ) values ( ?, ?, ?, ?, ?, ?, ?, ?, ? ).

If I then continue with the installation I have to re-enter the administrator u/n and p/s then I get a warning stating that I am about install though there is already a JAMWiki set-up, I then click Continue Install and I am faced with what looks the the starting page of JAMWiki (though not loaded properly) and in edit mode. If I try to type something in and click Save I then get this message:

An unknown system error has occurred. The error message is: java.lang.Exception: Failure while executing insert into jam_topic ( topic_id, virtual_wiki_id, topic_name, topic_type, topic_read_only, current_version_id, delete_date, topic_admin_only, redirect_to ) values ( ?, ?, ?, ?, ?, ?, ?, ?, ? ).

I know there is an issue somewhere with the Oracle connection but I have no idea how to resolve it. If I go into the Oracle Enterprise Manage Console I can see that JAMWiki has created the schema though the tables are all empty. Do I need to give the user JAM any special system privileges other than those included in Connect and Resource roles? I hope I have given enough information for someone to help me? though if not PLEASE contact me at Many thanks for reading my problem, Ben Sayers.

There is a known limitation to the Oracle 9 JDBC driver with regards to CLOB size (limit: 4K). This lead to the same error when I tried to install to Oracle 10g XE, but using the outdated ojdbc14.jar from Oracle 9 on the server. My bug report. Further information can be found on this Sun Developer Forum page. Side note: It might have been wise to post your bug report on the page Bug Reports ;-) -- Carsten Seiffert 05-Jul-2007 02:14 PDT
You may want to try using the 10g driver to access your 9i - perhaps that will work, but I am not sure... -- Carsten Seiffert 05-Jul-2007 02:15 PDT