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Update a Tomcat Installation from 7.8 to 7.9

The following steps describe how to update the Camunda artifacts on a Tomcat server in a shared process engine setting. For the entire procedure, refer to the update guide. If not already done, make sure to download the Camunda 7.9 Tomcat distribution.

The update procedure takes the following steps:

  1. Update the Camunda 7 Core Libraries
  2. Update Optional Camunda 7 Libraries
  3. Maintain Process Applications
  4. Update Web Applications

In each of the following steps, the identifier $*_VERSION refers to the current versions and the new versions of the artifacts.

Updated Tomcat Version

The pre-built Camunda 7.9 distribution ships with Tomcat 9.0.5, whereas 7.8 comes with Tomcat 8.0.47. Camunda 7.9 is supported on all Tomcat 6/7/8/9 versions such that a Tomcat update is not required when migrating from 7.8 to 7.9.

Should you want to update Tomcat along with Camunda, perform the following steps either before or after updating Camunda:

  • Copy all your Camunda-related libraries from $TOMCAT_HOME/lib to the new Tomcat server’s lib-directory.
  • Apply all modifications to Tomcat configuration files such as server.xml/bpm-platform.xml to the files located in the new Tomcat server’s directory.
  • Undeploy all process applications and copy them to the new Tomcat server’s directory for redeployment.

1. Update the Camunda 7 Core Libraries

Replace the following libraries in the folder $TOMCAT_HOME/lib/ with their new versions from the folder $TOMCAT_DISTRIBUTION/lib/:

  • camunda-engine-$PLATFORM_VERSION.jar
  • camunda-bpmn-model-$PLATFORM_VERSION.jar
  • camunda-cmmn-model-$PLATFORM_VERSION.jar
  • camunda-dmn-model-$PLATFORM_VERSION.jar
  • camunda-xml-model-$PLATFORM_VERSION.jar
  • camunda-engine-dmn-$PLATFORM_VERSION.jar
  • camunda-engine-feel-api-$PLATFORM_VERSION.jar
  • camunda-engine-feel-juel-$PLATFORM_VERSION.jar
  • camunda-commons-logging-$COMMONS_VERSION.jar
  • camunda-commons-typed-values-$COMMONS_VERSION.jar
  • camunda-commons-utils-$COMMONS_VERSION.jar

2. Update Optional Camunda 7 Libraries

In addition to the core libraries, there may be optional artifacts in $TOMCAT_HOME/lib/ for LDAP integration, Camunda Connect, Camunda Spin, and Groovy scripting. If you use any of these extensions, the following update steps apply:

LDAP Integration

Copy the following library from $TOMCAT_DISTRIBUTION/lib to the folder $TOMCAT_HOME/lib/, if present:

  • camunda-identity-ldap-$PLATFORM_VERSION.jar

Camunda Connect

Copy the following libraries from $TOMCAT_DISTRIBUTION/lib to the folder $TOMCAT_HOME/lib/, if present:

  • camunda-connect-connectors-all-$CONNECT_VERSION.jar
  • camunda-connect-core-$CONNECT_VERSION.jar
  • camunda-engine-plugin-connect-$PLATFORM_VERSION.jar

Camunda Spin

Copy the following libraries from $TOMCAT_DISTRIBUTION/lib to the folder $TOMCAT_HOME/lib/, if present:

  • camunda-spin-dataformat-all-$SPIN_VERSION.jar
  • camunda-spin-core-$SPIN_VERSION.jar
  • camunda-engine-plugin-spin-$PLATFORM_VERSION.jar

Groovy Scripting

Copy the following library from $TOMCAT_DISTRIBUTION/lib to the folder $TOMCAT_HOME/lib/, if present:

  • groovy-all-$GROOVY_VERSION.jar

3. Update Web Applications

Update REST API

The following steps are required to update the Camunda REST API on a Tomcat instance:

  1. Undeploy an existing web application with a name like camunda-engine-rest
  2. Download the REST API web application archive from our Artifact Repository Alternatively, switch to the private repository for the enterprise version (credentials from license required). Choose the correct version named $PLATFORM_VERSION/camunda-engine-rest-$PLATFORM_VERSION-tomcat.war.
  3. Deploy the web application archive to your Tomcat instance.

Update Cockpit, Tasklist, and Admin

The following steps are required to update the Camunda web applications Cockpit, Tasklist, and Admin on a Tomcat instance:

  1. Undeploy an existing web application with a name like camunda-webapp
  2. Download the Camunda web application archive from our Artifact Repository. Alternatively, switch to the private repository for the enterprise version (credentials from license required). Choose the correct version named $PLATFORM_VERSION/camunda-webapp-tomcat-$PLATFORM_VERSION.war.
  3. Deploy the web application archive to your Tomcat instance.

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