Abhishek Girish created DRILL-5089:
Summary: Skip initializing all enabled storage plugins for every
Project: Apache Drill
Issue Type: Improvement
Components: Query Planning & Optimization
Affects Versions: 1.9.0
Reporter: Abhishek Girish
In a query's lifecycle, at attempt is made to initialize each enabled storage
plugin, while building the schema tree. This is done regardless of the actual
plugins involved within a query.
Sometimes, when one or more of the enabled storage plugins have issues - either
due to misconfiguration or the underlying datasource being slow or being down,
the overall query time taken increases drastically. Most likely due the attempt
being made to register schemas from a faulty plugin.
For example, when a jdbc plugin is configured with SQL Server, and at one point
the underlying SQL Server db goes down, any Drill query starting to execute at
that point and beyond begin to slow down drastically.
We must skip registering unrelated schemas (& workspaces) for a query.
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