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Table of Contents

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  • Before upgrading Datameer X a plan should be made for application downtime scheduling, notifications, and creating a maintenance window for Datameer. Please take note of the system requirements and consider upgrading the MySQL service for Datameer's application database from 5.1 to 5.5 or 5.6, if applicable.
  • Backed up Datameer X files need to be included in the migration process. Previous files that aren't part of the migration process aren't supported in newer versions.
  • Jobs will need to be set to stop executing prior to the upgrade process. This could be done e.g. by Pause Job Scheduler.
  • Request possible assistance from the database administrator in case credentials for database are not available to the application owner.
  • Custom plug-ins which were created by Using the Plug-in SDK of a former Datameer X version need to be re-compiled!
  • Since it is recommended to not copy old configuration files or scripts to the new location, note the changes you have made in the previous setup. This information you will need to make necessary changes in the new configuration files.
    • As of Datameer X 7.4, a property file exists so Job Scheduler and Event Bus settings adjusted in the UI are read during Datameer X start up.
      • A properties file called "overrides.properties" isn't written on Datameer X but your systems HOME folder. (Path = <home>/.datameer/overrides.properties)
      • This property file is auto-created when adjusting the Event Bus or Job Scheduler settings under the Admin tab. This file can also be manually added and edited.
      • This is the last properties  file read on start up. (E.g., it overrides other property files like default.properties and deployMode.properties)
      • This file can be modified to allow for storing and the restoring of custom properties.
Tip
titleTIP

Symlinks that were created through the Datameer X installation must be updated through the updating process.

To update the symlink:

  1. Remove the existing symlink:

    No Format
    rm current

  2. Create a new symlink and change the working directory:

    No Format
    ln -s Datameer-<package> current
cd current

Disabling Housekeeping/Compaction services

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To validate whether any Workbook has been broken during an upgrade, Datameer X created the Workbook Health Check feature.  The tool reviews a Workbook's structure and reports any logical issues. This tool is available in versions 6.4.14, 7.1.13, 7.2.13, 7.4.11+, 7.5.4+, and 10.0.1+.  Datameer's best practice recommendations for upgrades are as follows:

    • Upgrade within the current branch to the version where the Workbook Health Check tool is available.  For Example, if the current version is 6.4.13, upgrade to 6.4.14.
    • Navigate http://<Datameer X host>:<port>/dev (admin rights are required), then click on Workbook Health Check and press Start button.
    • As soon as validation is complete (execution time varies based on the number and complexity of the existing Workbooks), you will receive a status summary and the broken Workbooks configuration IDs. The same information will also be written into Datameer conductor.log together with the error for every artifact. You might want to review broken Workbooks and fix the errors before the upgrade.  Note, a session timeout will interrupt the workbook validation check.
    • Upgrade to the desired Datameer X version.
    • Rerun the Workbook Health Check and ensure that there are no new broken items. In case there are Workbooks that have been broken by the upgrade, check the error messages contained in conductor.log and decide whether you could fix them manually or need to roll back and get Datameer X support assistance on the issue.

Backup Keyfiles and Keystore

If you have set up password encryption and/or enabled TLS  with custom certificates , backup your Keystore and Keyczar keyfiles.

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No Format
#Detect databases
detect old database [/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/database/hsql-db]
detect new database [/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/database/hsql-db]

Upgrade datameer database version [2.0.0.6] to version [2.0.2.0]

#Assert datameer is running
No

#Copy Das Data
copy das-data from [/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data] to [/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data]

#Upgrade starts...
Process upgrade scripts on database jdbc:hsqldb:file:das-data/database/hsql-db
	upgrade-2.0.1.hsql

#Update schema-version
set system.schemaVersion on database [/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/database/hsql-db] to [2.0.1]


#Update data uri's [/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data] -> [/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data]

log4j:WARN No appenders could be found for logger (org.hibernate.type.BasicTypeRegistry).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Converting 12 data entries
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/1/1 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/1/1
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/2/2 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/2/2
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/3/3 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/3/3
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/4/4 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/4/4
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/5/5 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/5/5
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/workbooks/6/6 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/workbooks/6/6
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/workbooks/7/7 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/workbooks/7/7
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/workbooks/8/8 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/workbooks/8/8
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/workbooks/9/9 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/workbooks/9/9
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/10/10 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/10/10
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/workbooks/11/11 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/workbooks/11/11
file:/Users/marko/Desktop/Datameer-2.0.1-0.20.2/das-data/fileuploads/10/12 -> file:/Users/marko/Development/Java/datameer/dap/build/dist/Datameer-2.0.2-0.20.2/das-data/fileuploads/10/12

Check or Update YARN Path Settings

 Check or update YARN application classpath and LD_LIBRARY path.  The  path settings are used to lookup and load libraries , therefor  incorrect path settings may lead into unexpected behavior .

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Anchor
rollback
rollback
How to Roll Back to a Previous Database Version

When upgrading, a database dump is created by Datameer X the file name is similar to mysql_db_dump_<oldVer>.sql. If an upgrade failed (failing upgrade scripts / failing upgrade injectors during startup), the database paths might be conflicting, it is therefore necessary to restore the Datameer X MySQL database dump. Follow the steps to complete this task.

  1. Drop the new database, for example on the database server or the MySQL CLI.

    No Format
    DROP DATABASE dap;

     

  2. Using the mysql-init.sql script, create a new database.

    No Format
    mysql [-h <dbhost>] -u root -p < bin/mysql-init.sql

     

  3. Import and restore the previous database using the following shell command.

    No Format
    mysql [-h <dbhost>] -u root -p dap < /path/to/dump_file_name

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