Kiu/VictoriaMetrics
Kiu/VictoriaMetrics
1
0
Fork 0
mirror of https://github.com/VictoriaMetrics/VictoriaMetrics.git synced 2024-12-15 00:13:30 +01:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

app/vmagent: fix data race when multiple -remoteWrite.urlRelabelConfig options are set

Browse Source 
Previously multiple goroutines could access remoteWriteCtx.tss concurrently, which could lead to data race
and improper relabeling. Now each goroutine has its own copy of tss during relabeling.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/599
This commit is contained in:
Aliaksandr Valialkin 2020-07-10 15:13:26 +03:00
parent 805a90f642
commit 4353ff7ef1
2 changed files with 15 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
app/vmagent/remotewrite/relabel.go
View File

@ -59,7 +59,6 @@ type relabelConfigs struct {
// initLabelsGlobal must be called after parsing command-line flags.
func initLabelsGlobal() {
// Init labelsGlobal
labelsGlobal = nil
for _, s := range *unparsedLabelsGlobal {
n := strings.IndexByte(s, '=')

24
app/vmagent/remotewrite/remotewrite.go
View File

@ -128,7 +128,7 @@ func Push(wr *prompbmarshal.WriteRequest) {
}
tss := wr.Timeseries
for len(tss) > 0 {
// Process big tss in smaller blocks in order to reduce maxmimum memory usage
// Process big tss in smaller blocks in order to reduce the maximum memory usage
tssBlock := tss
if len(tssBlock) > maxRowsPerBlock {
tssBlock = tss[:maxRowsPerBlock]
@ -162,8 +162,6 @@ type remoteWriteCtx struct {
pss []*pendingSeries
pssNextIdx uint64
tss []prompbmarshal.TimeSeries
relabelMetricsDropped *metrics.Counter
}
@ -208,15 +206,17 @@ func (rwctx *remoteWriteCtx) MustStop() {
func (rwctx *remoteWriteCtx) Push(tss []prompbmarshal.TimeSeries) {
var rctx *relabelCtx
var v *[]prompbmarshal.TimeSeries
rcs := allRelabelConfigs.Load().(*relabelConfigs)
prcs := rcs.perURL[rwctx.idx]
if len(prcs) > 0 {
rctx = getRelabelCtx()
// Make a copy of tss before applying relabeling in order to prevent
// from affecting time series for other remoteWrite.url configs.
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/467 for details.
rwctx.tss = append(rwctx.tss[:0], tss...)
tss = rwctx.tss
rctx = getRelabelCtx()
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/467
// and https://github.com/VictoriaMetrics/VictoriaMetrics/issues/599
v = tssRelabelPool.Get().(*[]prompbmarshal.TimeSeries)
tss = append(*v, tss...)
tssLen := len(tss)
tss = rctx.applyRelabeling(tss, nil, prcs)
rwctx.relabelMetricsDropped.Add(tssLen - len(tss))
@ -225,8 +225,14 @@ func (rwctx *remoteWriteCtx) Push(tss []prompbmarshal.TimeSeries) {
idx := atomic.AddUint64(&rwctx.pssNextIdx, 1) % uint64(len(pss))
pss[idx].Push(tss)
if rctx != nil {
*v = prompbmarshal.ResetTimeSeries(tss)
tssRelabelPool.Put(v)
putRelabelCtx(rctx)
// Zero rwctx.tss in order to free up GC references.
rwctx.tss = prompbmarshal.ResetTimeSeries(rwctx.tss)
}
}
var tssRelabelPool = &sync.Pool{
New: func() interface{} {
return []prompbmarshal.TimeSeries{}
},
}