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docs/CHANGELOG.md: recommend clearing caches after the upgrade from v1.78.0 to v1.78.1

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Aliaksandr Valialkin 2022-07-08 12:49:20 +03:00
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@ -75,14 +75,15 @@ scrape_configs:
Released at 08-07-2022
**Update notes:** it is recommended [clearing caches](https://docs.victoriametrics.com/#cache-removal) after the upgrade from [v1.78.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.78.0) in order to immediately fix the issue for newly ingested data. Otherwise the issue may exist for newly ingested data for up to a day after the upgrade.
* BUGFIX: properly register time series in per-day inverted index. Previously some series could miss registration in the per-day inverted index. This could result in missing time series during querying. The issue has been introduced in [v1.78.0](#v1780). See [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2798) and [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2793) issues.
## [v1.78.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.78.0)
Released at 20-06-2022
**Warning (03-07-2022):** VictoriaMetrics v1.78.0 contains a bug, which may result in missing time series during queries.
It is recommended upgrading to [v1.78.1](#v1781).
**Warning (03-07-2022):** VictoriaMetrics v1.78.0 contains a bug, which may result in missing time series during queries. It is recommended upgrading to [v1.78.1](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.78.1), which fixes the bug.
**Update notes:** this release introduces backwards-incompatible changes to communication protocol between `vmselect` and `vmstorage` nodes in cluster version of VictoriaMetrics because of added [query tracing](https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#query-tracing), so `vmselect` and `vmstorage` nodes will experience communication errors and read requests to `vmselect` will fail until the upgrade is complete. These errors will stop after all the `vmselect` and `vmstorage` nodes are updated to the new release. It is safe to downgrade to previous releases.