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domain: fix stats worker cannot recover from panic #9072

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merged 2 commits into from
Jan 15, 2019
Merged

domain: fix stats worker cannot recover from panic #9072

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6148e00
domain: fix stats worker cannot recover
alivxxx Jan 15, 2019
b1cdd91
check the panic counter
alivxxx Jan 15, 2019
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6 changes: 3 additions & 3 deletions domain/domain.go
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Original file line number Diff line number Diff line change
Expand Up @@ -846,6 +846,7 @@ func (do *Domain) newStatsOwner() owner.Manager {
}

func (do *Domain) updateStatsWorker(ctx sessionctx.Context, owner owner.Manager) {
defer recoverInDomain("updateStatsWorker", false)
lease := do.statsLease
deltaUpdateDuration := lease * 20
loadTicker := time.NewTicker(lease)
Expand All @@ -870,7 +871,6 @@ func (do *Domain) updateStatsWorker(ctx sessionctx.Context, owner owner.Manager)
}
defer func() {
do.SetStatsUpdating(false)
recoverInDomain("updateStatsWorker", false)
do.wg.Done()
}()
for {
Expand Down Expand Up @@ -927,11 +927,11 @@ func (do *Domain) updateStatsWorker(ctx sessionctx.Context, owner owner.Manager)
}

func (do *Domain) autoAnalyzeWorker(owner owner.Manager) {
defer recoverInDomain("autoAnalyzeWorker", false)
statsHandle := do.StatsHandle()
analyzeTicker := time.NewTicker(do.statsLease)
defer analyzeTicker.Stop()
defer func() {
recoverInDomain("autoAnalyzeWorker", false)
analyzeTicker.Stop()
do.wg.Done()
}()
for {
Expand Down
12 changes: 12 additions & 0 deletions domain/domain_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,9 +23,11 @@ import (
"github.com/pingcap/parser/ast"
"github.com/pingcap/parser/model"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/tidb/metrics"
"github.com/pingcap/tidb/store/mockstore"
"github.com/pingcap/tidb/util/mock"
"github.com/pingcap/tidb/util/testleak"
dto "github.com/prometheus/client_model/go"
)

func TestT(t *testing.T) {
Expand Down Expand Up @@ -128,6 +130,16 @@ func (*testSuite) TestT(c *C) {
c.Assert(*res[0], Equals, SlowQueryInfo{SQL: "ccc", Duration: 2 * time.Second})
c.Assert(*res[1], Equals, SlowQueryInfo{SQL: "bbb", Duration: 3 * time.Second})

metrics.PanicCounter.Reset()
// Since the stats lease is 0 now, so create a new ticker will panic.
// Test that they can recover from panic correctly.
dom.updateStatsWorker(ctx, nil)
dom.autoAnalyzeWorker(nil)
counter := metrics.PanicCounter.WithLabelValues(metrics.LabelDomain)
pb := &dto.Metric{}
counter.Write(pb)
c.Assert(pb.GetCounter().GetValue(), Equals, float64(2))

err = store.Close()
c.Assert(err, IsNil)
}
Expand Down