Identifying Multiple Drill Versions in a Cluster

As of Drill 1.10, the Web UI displays the Drill version running on each Drill node in the cluster, as shown in the following image:

You can also retrieve the version information by running the following query:

   SELECT * FROM sys.drillbits;

If the version of Drill differs between nodes, a warning message appears. The nodes running the current version have a green label, while the nodes running another version have a red label, as shown in the image above.

The Drill node from which you access the Web UI defines the current version. For example, assume you have two Drill nodes in a cluster with the following IP addresses, versions, and Web UI access:

Accessing the Web UI for Drill node 10.10.123.88 displays Drill version 1.9.0 as the current version with a green label, while also displaying the Drill version for Drill node 10.10.136.25, but with a red label. Accessing the Web UI for Drill node 10.10.136.25 displays 1.10.0 as the current version with a green label, while also displaying the Drill version for Drill node 10.10.123.88, but with a red label. In both cases, the Web UI generates a warning to state that the Drill versions do not match.

The Web UI sorts the Drill nodes by version, starting with the current Drill node, followed by Drill nodes with Drill versions that match the current version, followed by Drill nodes that do not match the current version. Drill nodes marked as having an “undefined” version may be incorrectly defined or have a pre-1.10.0 version of Drill installed.