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metadata indexer: investigate metadata entries with empty mappings
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Description

In T1549#31128, @zack wrote:

This is now done, aside from a minor issue noted below:

softwareheritage-indexer=# select count(*) from revision_intrinsic_metadata where mappings = array[]::text[];
 count 
-------
   372

These metadata entries shouldn't have been generated in the first place, but they are real metadata, with no indication where they have been extracted from.

We should investigate why they are there.

Event Timeline

zack renamed this task from metadata indexer: investigate empty mappings to metadata indexer: investigate metadata entries with empty mappings.Apr 24 2019, 5:20 PM
zack triaged this task as Normal priority.
zack lowered the priority of this task from Normal to Low.
zack created this task.
zack updated the task description. (Show Details)

We should investigate why they are there.

They were indexed by an old version of the indexers, and stopped being head of their origin before we updated the indexer to write the mapping.

So it's all good