fix(blooms): Fix check for skipping most recent data when filtering blooms (#15300)

After changing the default of  `-bloom-build.planner.min-table-offset` from `1` (yesterday) to `0` (today), we noticed that the bloom gateways reported a very high percentage of missing series in blocks.

This is because the gateway received filter requests for today's block, but the requested series is too new and has not been added to the bloom block yet.

In the bloom querier on the index gateway there is a condition under which requests to the bloom gateway are skipped, because the blooms are likely not available yet.

This PR changes this condition to correctly take the min-table-offset as well as the planning-interval into account.

Signed-off-by: Christian Haudum <christian.haudum@gmail.com>

Author: chaudum

pkg/bloomgateway/querier.go

@@ -72,8 +72,8 @@ func newQuerierMetrics(registerer prometheus.Registerer, namespace, subsystem st
 }
 
 type QuerierConfig struct {
-	// MinTableOffset is derived from the compactor's MinTableOffset
-	MinTableOffset int
+	BuildInterval    time.Duration
+	BuildTableOffset int
 }
 
 // BloomQuerier is a store-level abstraction on top of Client
@@ -119,30 +119,28 @@ func (bq *BloomQuerier) FilterChunkRefs(ctx context.Context, tenant string, from
 	preFilterSeries := len(grouped)
 
 	// Do not attempt to filter chunks for which there are no blooms
-	if bq.cfg.MinTableOffset > 0 {
-		minAge := truncateDay(model.Now()).Add(-1 * config.ObjectStorageIndexRequiredPeriod * time.Duration(bq.cfg.MinTableOffset-1))
-		if through.After(minAge) {
-			level.Debug(logger).Log(
-				"msg", "skip too recent chunks",
-				"tenant", tenant,
-				"from", from.Time(),
-				"through", through.Time(),
-				"responses", 0,
-				"preFilterChunks", preFilterChunks,
-				"postFilterChunks", preFilterChunks,
-				"filteredChunks", 0,
-				"preFilterSeries", preFilterSeries,
-				"postFilterSeries", preFilterSeries,
-				"filteredSeries", 0,
-			)
-
-			bq.metrics.chunksTotal.Add(float64(preFilterChunks))
-			bq.metrics.chunksFiltered.Add(0)
-			bq.metrics.seriesTotal.Add(float64(preFilterSeries))
-			bq.metrics.seriesFiltered.Add(0)
-
-			return chunkRefs, false, nil
-		}
+	minAge := model.Now().Add(-1 * (config.ObjectStorageIndexRequiredPeriod*time.Duration(bq.cfg.BuildTableOffset) + 2*bq.cfg.BuildInterval))
+	if through.After(minAge) {
+		level.Info(logger).Log(
+			"msg", "skip too recent chunks",
+			"tenant", tenant,
+			"from", from.Time(),
+			"through", through.Time(),
+			"responses", 0,
+			"preFilterChunks", preFilterChunks,
+			"postFilterChunks", preFilterChunks,
+			"filteredChunks", 0,
+			"preFilterSeries", preFilterSeries,
+			"postFilterSeries", preFilterSeries,
+			"filteredSeries", 0,
+		)
+
+		bq.metrics.chunksTotal.Add(float64(preFilterChunks))
+		bq.metrics.chunksFiltered.Add(0)
+		bq.metrics.seriesTotal.Add(float64(preFilterSeries))
+		bq.metrics.seriesFiltered.Add(0)
+
+		return chunkRefs, false, nil
 	}
 
 	var skippedGrps [][]*logproto.GroupedChunkRefs

pkg/loki/modules.go

@@ -1542,7 +1542,8 @@ func (t *Loki) initIndexGateway() (services.Service, error) {
 		}
 		resolver := bloomgateway.NewBlockResolver(t.BloomStore, logger)
 		querierCfg := bloomgateway.QuerierConfig{
-			MinTableOffset: t.Cfg.BloomBuild.Planner.MinTableOffset,
+			BuildTableOffset: t.Cfg.BloomBuild.Planner.MinTableOffset,
+			BuildInterval:    t.Cfg.BloomBuild.Planner.PlanningInterval,
 		}
 		bloomQuerier = bloomgateway.NewQuerier(bloomGatewayClient, querierCfg, t.Overrides, resolver, prometheus.DefaultRegisterer, logger)
 	}