From 92d69803606620505ed8f0226abb640a121ec1cd Mon Sep 17 00:00:00 2001 From: George Krajcsovits Date: Fri, 19 May 2023 10:24:06 +0200 Subject: [PATCH] Fix populateWithDelChunkSeriesIterator and gauge histograms (#12330) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use AppendableGauge to detect corrupt chunk with gauge histograms. Detect if first sample is a gauge but the chunk is not set up to contain gauge histograms. Signed-off-by: György Krajcsovits Signed-off-by: George Krajcsovits --- tsdb/head_read.go | 8 +- tsdb/querier.go | 137 ++++++++++++++----- tsdb/querier_test.go | 274 +++++++++++++++++++++++++++++++++++++ tsdb/tsdbutil/chunks.go | 14 +- tsdb/tsdbutil/histogram.go | 10 ++ 5 files changed, 404 insertions(+), 39 deletions(-) diff --git a/tsdb/head_read.go b/tsdb/head_read.go index 9c546ab16..0e6e005ea 100644 --- a/tsdb/head_read.go +++ b/tsdb/head_read.go @@ -331,7 +331,7 @@ func (h *headChunkReader) chunk(meta chunks.Meta, copyLastChunk bool) (chunkenc. } s.Unlock() - return &safeChunk{ + return &safeHeadChunk{ Chunk: chk, s: s, cid: cid, @@ -627,15 +627,15 @@ func (b boundedIterator) Seek(t int64) chunkenc.ValueType { return b.Iterator.Seek(t) } -// safeChunk makes sure that the chunk can be accessed without a race condition -type safeChunk struct { +// safeHeadChunk makes sure that the chunk can be accessed without a race condition +type safeHeadChunk struct { chunkenc.Chunk s *memSeries cid chunks.HeadChunkID isoState *isolationState } -func (c *safeChunk) Iterator(reuseIter chunkenc.Iterator) chunkenc.Iterator { +func (c *safeHeadChunk) Iterator(reuseIter chunkenc.Iterator) chunkenc.Iterator { c.s.Lock() it := c.s.iterator(c.cid, c.Chunk, c.isoState, reuseIter) c.s.Unlock() diff --git a/tsdb/querier.go b/tsdb/querier.go index 8b17bb745..8bcd451f3 100644 --- a/tsdb/querier.go +++ b/tsdb/querier.go @@ -785,14 +785,35 @@ func (p *populateWithDelChunkSeriesIterator) Next() bool { if app, err = newChunk.Appender(); err != nil { break } - if hc, ok := p.currChkMeta.Chunk.(*chunkenc.HistogramChunk); ok { + + switch hc := p.currChkMeta.Chunk.(type) { + case *chunkenc.HistogramChunk: newChunk.(*chunkenc.HistogramChunk).SetCounterResetHeader(hc.GetCounterResetHeader()) + case *safeHeadChunk: + if unwrapped, ok := hc.Chunk.(*chunkenc.HistogramChunk); ok { + newChunk.(*chunkenc.HistogramChunk).SetCounterResetHeader(unwrapped.GetCounterResetHeader()) + } else { + err = fmt.Errorf("internal error, could not unwrap safeHeadChunk to histogram chunk: %T", hc.Chunk) + } + default: + err = fmt.Errorf("internal error, unknown chunk type %T when expecting histogram", p.currChkMeta.Chunk) + } + if err != nil { + break } + var h *histogram.Histogram t, h = p.currDelIter.AtHistogram() p.curr.MinTime = t + // Detect missing gauge reset hint. + if h.CounterResetHint == histogram.GaugeType && newChunk.(*chunkenc.HistogramChunk).GetCounterResetHeader() != chunkenc.GaugeType { + err = fmt.Errorf("found gauge histogram in non gauge chunk") + break + } + app.AppendHistogram(t, h) + for vt := p.currDelIter.Next(); vt != chunkenc.ValNone; vt = p.currDelIter.Next() { if vt != chunkenc.ValHistogram { err = fmt.Errorf("found value type %v in histogram chunk", vt) @@ -801,23 +822,37 @@ func (p *populateWithDelChunkSeriesIterator) Next() bool { t, h = p.currDelIter.AtHistogram() // Defend against corrupted chunks. - pI, nI, okToAppend, counterReset := app.(*chunkenc.HistogramAppender).Appendable(h) - if len(pI)+len(nI) > 0 { - err = fmt.Errorf( - "bucket layout has changed unexpectedly: %d positive and %d negative bucket interjections required", - len(pI), len(nI), - ) - break - } - if counterReset { - err = errors.New("detected unexpected counter reset in histogram") - break - } - if !okToAppend { - err = errors.New("unable to append histogram due to unexpected schema change") - break + if h.CounterResetHint == histogram.GaugeType { + pI, nI, bpI, bnI, _, _, okToAppend := app.(*chunkenc.HistogramAppender).AppendableGauge(h) + if !okToAppend { + err = errors.New("unable to append histogram due to unexpected schema change") + break + } + if len(pI)+len(nI)+len(bpI)+len(bnI) > 0 { + err = fmt.Errorf( + "bucket layout has changed unexpectedly: forward %d positive, %d negative, backward %d positive %d negative bucket interjections required", + len(pI), len(nI), len(bpI), len(bnI), + ) + break + } + } else { + pI, nI, okToAppend, counterReset := app.(*chunkenc.HistogramAppender).Appendable(h) + if len(pI)+len(nI) > 0 { + err = fmt.Errorf( + "bucket layout has changed unexpectedly: %d positive and %d negative bucket interjections required", + len(pI), len(nI), + ) + break + } + if counterReset { + err = errors.New("detected unexpected counter reset in histogram") + break + } + if !okToAppend { + err = errors.New("unable to append histogram due to unexpected schema change") + break + } } - app.AppendHistogram(t, h) } case chunkenc.ValFloat: @@ -842,14 +877,35 @@ func (p *populateWithDelChunkSeriesIterator) Next() bool { if app, err = newChunk.Appender(); err != nil { break } - if hc, ok := p.currChkMeta.Chunk.(*chunkenc.FloatHistogramChunk); ok { + + switch hc := p.currChkMeta.Chunk.(type) { + case *chunkenc.FloatHistogramChunk: newChunk.(*chunkenc.FloatHistogramChunk).SetCounterResetHeader(hc.GetCounterResetHeader()) + case *safeHeadChunk: + if unwrapped, ok := hc.Chunk.(*chunkenc.FloatHistogramChunk); ok { + newChunk.(*chunkenc.FloatHistogramChunk).SetCounterResetHeader(unwrapped.GetCounterResetHeader()) + } else { + err = fmt.Errorf("internal error, could not unwrap safeHeadChunk to float histogram chunk: %T", hc.Chunk) + } + default: + err = fmt.Errorf("internal error, unknown chunk type %T when expecting float histogram", p.currChkMeta.Chunk) + } + if err != nil { + break } + var h *histogram.FloatHistogram t, h = p.currDelIter.AtFloatHistogram() p.curr.MinTime = t + // Detect missing gauge reset hint. + if h.CounterResetHint == histogram.GaugeType && newChunk.(*chunkenc.FloatHistogramChunk).GetCounterResetHeader() != chunkenc.GaugeType { + err = fmt.Errorf("found float gauge histogram in non gauge chunk") + break + } + app.AppendFloatHistogram(t, h) + for vt := p.currDelIter.Next(); vt != chunkenc.ValNone; vt = p.currDelIter.Next() { if vt != chunkenc.ValFloatHistogram { err = fmt.Errorf("found value type %v in histogram chunk", vt) @@ -858,21 +914,36 @@ func (p *populateWithDelChunkSeriesIterator) Next() bool { t, h = p.currDelIter.AtFloatHistogram() // Defend against corrupted chunks. - pI, nI, okToAppend, counterReset := app.(*chunkenc.FloatHistogramAppender).Appendable(h) - if len(pI)+len(nI) > 0 { - err = fmt.Errorf( - "bucket layout has changed unexpectedly: %d positive and %d negative bucket interjections required", - len(pI), len(nI), - ) - break - } - if counterReset { - err = errors.New("detected unexpected counter reset in histogram") - break - } - if !okToAppend { - err = errors.New("unable to append histogram due to unexpected schema change") - break + if h.CounterResetHint == histogram.GaugeType { + pI, nI, bpI, bnI, _, _, okToAppend := app.(*chunkenc.FloatHistogramAppender).AppendableGauge(h) + if !okToAppend { + err = errors.New("unable to append histogram due to unexpected schema change") + break + } + if len(pI)+len(nI)+len(bpI)+len(bnI) > 0 { + err = fmt.Errorf( + "bucket layout has changed unexpectedly: forward %d positive, %d negative, backward %d positive %d negative bucket interjections required", + len(pI), len(nI), len(bpI), len(bnI), + ) + break + } + } else { + pI, nI, okToAppend, counterReset := app.(*chunkenc.FloatHistogramAppender).Appendable(h) + if len(pI)+len(nI) > 0 { + err = fmt.Errorf( + "bucket layout has changed unexpectedly: %d positive and %d negative bucket interjections required", + len(pI), len(nI), + ) + break + } + if counterReset { + err = errors.New("detected unexpected counter reset in histogram") + break + } + if !okToAppend { + err = errors.New("unable to append histogram due to unexpected schema change") + break + } } app.AppendFloatHistogram(t, h) diff --git a/tsdb/querier_test.go b/tsdb/querier_test.go index 6802fc250..5bf721a62 100644 --- a/tsdb/querier_test.go +++ b/tsdb/querier_test.go @@ -29,6 +29,7 @@ import ( "github.com/pkg/errors" "github.com/stretchr/testify/require" + "github.com/prometheus/prometheus/model/histogram" "github.com/prometheus/prometheus/model/labels" "github.com/prometheus/prometheus/storage" "github.com/prometheus/prometheus/tsdb/chunkenc" @@ -907,6 +908,202 @@ func TestPopulateWithTombSeriesIterators(t *testing.T) { sample{3, 5, nil, nil}, sample{6, 1, nil, nil}, sample{7, 89, nil, nil}, }, }, + { + name: "one histogram chunk", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, tsdbutil.GenerateTestHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestHistogram(3), nil}, + sample{6, 0, tsdbutil.GenerateTestHistogram(6), nil}, + }, + }, + expected: []tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestHistogram(1), nil}, + sample{2, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(2)), nil}, + sample{3, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(3)), nil}, + sample{6, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(6)), nil}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestHistogram(1), nil}, + sample{2, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(2)), nil}, + sample{3, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(3)), nil}, + sample{6, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(6)), nil}, + }), + }, + }, + { + name: "one histogram chunk intersect with deletion interval", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, tsdbutil.GenerateTestHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestHistogram(3), nil}, + sample{6, 0, tsdbutil.GenerateTestHistogram(6), nil}, + }, + }, + intervals: tombstones.Intervals{{Mint: 5, Maxt: 20}}, + expected: []tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestHistogram(1), nil}, + sample{2, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(2)), nil}, + sample{3, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(3)), nil}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestHistogram(1), nil}, + sample{2, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(2)), nil}, + sample{3, 0, tsdbutil.SetHistogramNotCounterReset(tsdbutil.GenerateTestHistogram(3)), nil}, + }), + }, + }, + { + name: "one float histogram chunk", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, nil, tsdbutil.GenerateTestFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestFloatHistogram(3)}, + sample{6, 0, nil, tsdbutil.GenerateTestFloatHistogram(6)}, + }, + }, + expected: []tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(2))}, + sample{3, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(3))}, + sample{6, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(6))}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(2))}, + sample{3, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(3))}, + sample{6, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(6))}, + }), + }, + }, + { + name: "one float histogram chunk intersect with deletion interval", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, nil, tsdbutil.GenerateTestFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestFloatHistogram(3)}, + sample{6, 0, nil, tsdbutil.GenerateTestFloatHistogram(6)}, + }, + }, + intervals: tombstones.Intervals{{Mint: 5, Maxt: 20}}, + expected: []tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(2))}, + sample{3, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(3))}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(2))}, + sample{3, 0, nil, tsdbutil.SetFloatHistogramNotCounterReset(tsdbutil.GenerateTestFloatHistogram(3))}, + }), + }, + }, + { + name: "one gauge histogram chunk", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, tsdbutil.GenerateTestGaugeHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestGaugeHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestGaugeHistogram(3), nil}, + sample{6, 0, tsdbutil.GenerateTestGaugeHistogram(6), nil}, + }, + }, + expected: []tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestGaugeHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestGaugeHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestGaugeHistogram(3), nil}, + sample{6, 0, tsdbutil.GenerateTestGaugeHistogram(6), nil}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestGaugeHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestGaugeHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestGaugeHistogram(3), nil}, + sample{6, 0, tsdbutil.GenerateTestGaugeHistogram(6), nil}, + }), + }, + }, + { + name: "one gauge histogram chunk intersect with deletion interval", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, tsdbutil.GenerateTestGaugeHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestGaugeHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestGaugeHistogram(3), nil}, + sample{6, 0, tsdbutil.GenerateTestGaugeHistogram(6), nil}, + }, + }, + intervals: tombstones.Intervals{{Mint: 5, Maxt: 20}}, + expected: []tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestGaugeHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestGaugeHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestGaugeHistogram(3), nil}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, tsdbutil.GenerateTestGaugeHistogram(1), nil}, + sample{2, 0, tsdbutil.GenerateTestGaugeHistogram(2), nil}, + sample{3, 0, tsdbutil.GenerateTestGaugeHistogram(3), nil}, + }), + }, + }, + { + name: "one gauge float histogram", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(3)}, + sample{6, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(6)}, + }, + }, + expected: []tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(3)}, + sample{6, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(6)}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(3)}, + sample{6, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(6)}, + }), + }, + }, + { + name: "one gauge float histogram chunk intersect with deletion interval", + chks: [][]tsdbutil.Sample{ + { + sample{1, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(3)}, + sample{6, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(6)}, + }, + }, + intervals: tombstones.Intervals{{Mint: 5, Maxt: 20}}, + expected: []tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(3)}, + }, + expectedChks: []chunks.Meta{ + tsdbutil.ChunkFromSamples([]tsdbutil.Sample{ + sample{1, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(1)}, + sample{2, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(2)}, + sample{3, 0, nil, tsdbutil.GenerateTestGaugeFloatHistogram(3)}, + }), + }, + }, } for _, tc := range cases { t.Run(tc.name, func(t *testing.T) { @@ -2411,3 +2608,80 @@ func BenchmarkHeadQuerier(b *testing.B) { require.NoError(b, ss.Err()) } } + +// This is a regression test for the case where gauge histograms were not handled by +// populateWithDelChunkSeriesIterator correctly. +func TestQueryWithDeletedHistograms(t *testing.T) { + testcases := map[string]func(int) (*histogram.Histogram, *histogram.FloatHistogram){ + "intCounter": func(i int) (*histogram.Histogram, *histogram.FloatHistogram) { + return tsdbutil.GenerateTestHistogram(i), nil + }, + "intgauge": func(i int) (*histogram.Histogram, *histogram.FloatHistogram) { + return tsdbutil.GenerateTestGaugeHistogram(rand.Int() % 1000), nil + }, + "floatCounter": func(i int) (*histogram.Histogram, *histogram.FloatHistogram) { + return nil, tsdbutil.GenerateTestFloatHistogram(i) + }, + "floatGauge": func(i int) (*histogram.Histogram, *histogram.FloatHistogram) { + return nil, tsdbutil.GenerateTestGaugeFloatHistogram(rand.Int() % 1000) + }, + } + + for name, tc := range testcases { + t.Run(name, func(t *testing.T) { + db := openTestDB(t, nil, nil) + defer func() { + require.NoError(t, db.Close()) + }() + + db.EnableNativeHistograms() + appender := db.Appender(context.Background()) + + var ( + err error + seriesRef storage.SeriesRef + ) + lbs := labels.FromStrings("__name__", "test", "type", name) + + for i := 0; i < 100; i++ { + h, fh := tc(i) + seriesRef, err = appender.AppendHistogram(seriesRef, lbs, int64(i), h, fh) + require.NoError(t, err) + } + + err = appender.Commit() + require.NoError(t, err) + + matcher, err := labels.NewMatcher(labels.MatchEqual, "__name__", "test") + require.NoError(t, err) + + // Delete the last 20. + err = db.Delete(80, 100, matcher) + require.NoError(t, err) + + chunkQuerier, err := db.ChunkQuerier(context.Background(), 0, 100) + require.NoError(t, err) + + css := chunkQuerier.Select(false, nil, matcher) + + seriesCount := 0 + for css.Next() { + seriesCount++ + series := css.At() + + sampleCount := 0 + it := series.Iterator(nil) + for it.Next() { + chk := it.At() + for cit := chk.Chunk.Iterator(nil); cit.Next() != chunkenc.ValNone; { + sampleCount++ + } + } + require.NoError(t, it.Err()) + require.Equal(t, 80, sampleCount) + } + require.NoError(t, css.Err()) + require.Equal(t, 1, seriesCount) + }) + } +} diff --git a/tsdb/tsdbutil/chunks.go b/tsdb/tsdbutil/chunks.go index 02a7dd619..6e57016fe 100644 --- a/tsdb/tsdbutil/chunks.go +++ b/tsdb/tsdbutil/chunks.go @@ -71,9 +71,19 @@ func ChunkFromSamplesGeneric(s Samples) chunks.Meta { case chunkenc.ValFloat: ca.Append(s.Get(i).T(), s.Get(i).F()) case chunkenc.ValHistogram: - ca.AppendHistogram(s.Get(i).T(), s.Get(i).H()) + h := s.Get(i).H() + ca.AppendHistogram(s.Get(i).T(), h) + if i == 0 && h.CounterResetHint == histogram.GaugeType { + hc := c.(*chunkenc.HistogramChunk) + hc.SetCounterResetHeader(chunkenc.GaugeType) + } case chunkenc.ValFloatHistogram: - ca.AppendFloatHistogram(s.Get(i).T(), s.Get(i).FH()) + fh := s.Get(i).FH() + ca.AppendFloatHistogram(s.Get(i).T(), fh) + if i == 0 && fh.CounterResetHint == histogram.GaugeType { + hc := c.(*chunkenc.FloatHistogramChunk) + hc.SetCounterResetHeader(chunkenc.GaugeType) + } default: panic(fmt.Sprintf("unknown sample type %s", sampleType.String())) } diff --git a/tsdb/tsdbutil/histogram.go b/tsdb/tsdbutil/histogram.go index 3c276c841..2145034e1 100644 --- a/tsdb/tsdbutil/histogram.go +++ b/tsdb/tsdbutil/histogram.go @@ -108,3 +108,13 @@ func GenerateTestGaugeFloatHistogram(i int) *histogram.FloatHistogram { h.CounterResetHint = histogram.GaugeType return h } + +func SetHistogramNotCounterReset(h *histogram.Histogram) *histogram.Histogram { + h.CounterResetHint = histogram.NotCounterReset + return h +} + +func SetFloatHistogramNotCounterReset(h *histogram.FloatHistogram) *histogram.FloatHistogram { + h.CounterResetHint = histogram.NotCounterReset + return h +}