Overview
Users of Kubernetes based installs may notice their queries.json showing non JSON formatted messages after upgrading to Dremio 20 or later
Applies To
Kubernetes / Docker based releases 20.0 onwards
Details
The user may notice messages in queries.json that look similar to the following
Query: 1db13945-839b-1b4b-240e-962c845b4300; outcome: COMPLETED Query: 1db13a0c-3015-ee60-166a-70ba9c594800; outcome: COMPLETED Query: 1db13a0b-c14b-ced5-620b-3249a8707000; outcome: COMPLETED
Cause
There was a change to the logback.xml introduced in Dremio 20.0 onwards that is decribed in the release notes here:
Solution
Since upgrading Kubernetes only upgrades the image, the user will need to download the new logback.xml from the Dremio repo below
https://github.com/dremio/dremio-cloud-tools/blob/master/charts/dremio_v2/config/logback.xml
You will then need to rebuild your ConfigMap to include the new logback.xml. If you are using Helm with our charts, this would mean replacing the old logback.xml with the new one in the config directory and upgrading the Dremio release
Note: if you are running an older release of Dremio and use the v20.x version of the logback.xml you will also experience problems with missing entries.