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lib/storage: clear the err if it is set to io.EOF when searching for the TSID by metricID

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This is expected error after when recently added indexdb data isn't available for search yet
or wasn't flushed to disk after unclean shutdown of VictoriaMetrics.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3515
This commit is contained in:
Aliaksandr Valialkin 2022-12-20 13:56:53 -08:00
parent a6a2e35a83
commit 1ff62629f4
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2 changed files with 4 additions and 1 deletions
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1
docs/CHANGELOG.md
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@ -17,6 +17,7 @@ The following tip changes can be tested by building VictoriaMetrics components f
**Update note 1:** This and newer releases of VictoriaMetrics may return gaps for `rate(m[d])` queries on short time ranges if `[d]` lookbehind window is set expliticly. For example, `rate(http_requests_total[$__interval])`. This reduces confusion level when the user expects the needed results from the query with explicitly set lookbehind window. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3483). The previous gap filling behaviour can be restored by removing explicit lookbehind window `[d]` from the query, e.g. by substituting the `rate(m[d])` with `rate(m)`. See [these docs](https://docs.victoriametrics.com/MetricsQL.html#implicit-query-conversions) for details.
* BUGFIX: fix `error when searching for TSIDs by metricIDs in the previous indexdb: EOF` error, which can occur during queries after unclean shutdown of VictoriaMetrics (e.g. via hardware reset, out of memory crash or `kill -9`). The error has been introduced in [v1.85.2](https://docs.victoriametrics.com/CHANGELOG.html#v1852). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3515).
* BUGFIX: [VictoriaMetrics enterprise](https://docs.victoriametrics.com/enterprise.html): expose proper values for `vm_downsampling_partitions_scheduled` and `vm_downsampling_partitions_scheduled_size_bytes` metrics, which were added at [v1.78.0](https://docs.victoriametrics.com/CHANGELOG.html#v1780). See [this feature request](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2612).
* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): never extend explicitly set lookbehind window for [rate()](https://docs.victoriametrics.com/MetricsQL.html#rate) function. This reduces the level of confusion when the user expects the needed results after explicitly seting the lookbehind window `[d]` in the query `rate(m[d])`. Previously VictoriaMetrics could silently extend the lookbehind window, so it covers at least two raw samples. Now this behavior works only if the lookbehind window in square brackets isn't set explicitly, e.g. in the case of `rate(m)`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3483) for details.

4
lib/storage/index_db.go
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@ -2059,11 +2059,13 @@ func (db *indexDB) getTSIDsFromMetricIDs(qt *querytracer.Tracer, accountID, proj
// Cannot find TSID for the given metricID.
// This may be the case on incomplete indexDB
// due to snapshot or due to unflushed entries.
// Just increment errors counter and skip it.
// Just increment errors counter and skip it for now.
atomic.AddUint64(&is.db.missingTSIDsForMetricID, 1)
err = nil
continue
}
err = fmt.Errorf("cannot find tsid for metricID=%d: %w", metricID, err)
return
}
is.db.putToMetricIDCache(metricID, tsid)
i++