Migrating from Talend Dictionary Service 7.x installed with an embedded MongoDB - 8.0

Talend Migration and Upgrade Guide

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Installation and Upgrade
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Before you begin

You have downloaded Talend Dictionary Service 8.0.


  1. Stop your instance of the previous version of Talend Dictionary Service but keep MongoDB running.
  2. Back up the MongoDB instance used for the previous version of Talend Dictionary Service using the following command: mongodump -h <source_mongodb_host>:<source_mongo_port> -d <source_database> -u <source_mongodb_user> -p <source_mongodb_password> -o <dump_output>
    The default value for the embedded MongoDB properties are the following:
    Property Value
    mongodb.host localhost
    mongodb.port 27017
    mongodb.database dqdict
    mongodb.user dqdict-user
    mongodb.password duser


    mongodump -h localhost:27017 -d dqdict -u dqdict-user -p duser -o dump\         
  3. Stop your MongoDB instance.
  4. Install Talend Dictionary Service 8.0 with the embedded MongoDB, and do not start the instance.
  5. If you have installed Talend Dictionary Service 8.0 in service mode, stop the instance, delete the database and stop MongoDB:
    1. Open a mongo shell as Talend Dictionary Service database user and execute the following commands.
      For Linux:
      cd <install_dir>/mongodb/bin
      ./mongo dqdict -u dqdict-user -p duser --port 27017
      For Windows:
      <install_dir>\mongodb\bin>mongo dqdict -u dqdict-user -p duser --port 27017
    2. Switch to Talend Dictionary Service database: use dqdict
    3. Drop the database: db.runCommand( { dropDatabase: 1 } )
    4. Exit mongo shell: exit
    5. Stop MongoDB.
  6. Open the previous version of the <Tomcat>/conf/data-quality.properties file and the new version.
  7. In the new version of the data-quality.properties file, replace the following parameter names with the new names:
    Previous parameter name New parameter name
    dq.mongo.host spring.data.mongodb.host
    dq.mongo.port spring.data.mongodb.port
    dq.mongo.username spring.data.mongodb.username
    dq.mongo.password spring.data.mongodb.password
    dq.mongo.database.name spring.data.mongodb.database
    dq.mongo.ssl.enabled spring.data.mongodb.ssl
    dq.mongo.ssl.trust-store spring.data.mongodb.ssl.trust-store
    dq.mongo.ssl.trust-store-password spring.data.mongodb.ssl.trust-store-password
  8. If you have performed any custom configuration to the previous version of the data-quality.properties file, update the 8.0 version of the file by coping the values from the old configuration file.
  9. Start MongoDB of the 8.0 version.
  10. Restore the backup performed on the MongoDB of the previous version of Talend Dictionary Service, on the 8.0.x MongoDB instance using the following command: mongorestore -h <source_mongodb_host>:<source_mongo_port> -d <source_database> -u <source_mongodb_user> -p <source_mongodb_password> dump\


    mongorestore -h localhost:27017 -d dqdict -u dqdict-user -p duser dump\          
  11. Start Talend Dictionary Service 8.0 by launching, in this order:
    • Apache ZooKeeper
    • Apache Kafka
    • Apache Tomcat (Talend Administration Center server and Talend Identity and Access Management server)
    • MongoDB
    • MinIO


You are now ready to use Talend Dictionary Service 8.0.