Details
Description
When doing a full rebuild (or initial async build) of a local or global index using IndexTool and PhoenixIndexImportDirectMapper, or doing a synchronous initial build of a global index using the index create DDL, we generate the index mutations by using an UPSERT SELECT query from the base table to the index.
The timestamps of the mutations use the default HBase behavior, which is to take the current wall clock. However, the timestamp of an index KeyValue should use the timestamp of the initial KeyValue in the base table.
Having base table and index timestamps out of sync can cause all sorts of weird side effects, such as if the base table has data with an expired TTL that isn't expired in the index yet. Also inserting old mutations with new timestamps may overwrite the data that has been newly overwritten by the regular data path during index build, which would lead to data loss and inconsistency issues.
Attachments
Attachments
Issue Links
- relates to
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PHOENIX-5019 Index mutations created by synchronous index builds will have wrong timestamps
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- Resolved
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- links to
