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Posted to issues-all@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2026/07/31 07:32:00 UTC

[jira] [Created] (IMPALA-15234) Provide a way to clear HBO cache

Quanlong Huang created IMPALA-15234:
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             Summary: Provide a way to clear HBO cache
                 Key: IMPALA-15234
                 URL: https://issues.apache.org/jira/browse/IMPALA-15234
             Project: IMPALA
          Issue Type: New Feature
          Components: Backend
            Reporter: Quanlong Huang


We should provide a command (in impala-shell) or WebUI endpoint to clear HBO stats, in case when "bad" stats are stored, to prevent poisoning future query plans.

In e2e tests while testing expected HBO stats are stored, we also need this to clear the cache, to make sure they are not accidentially stored by previous queries.

The HBO cache are keyed by hash strings so it's hard to identify which keys belong to a specific table. As a first step, we should at least support clearing the entire cache.



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