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fix: lock accesses to encoder in json stdout exporter to prevent crash #2265

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merged 5 commits into from Sep 30, 2021
Merged

fix: lock accesses to encoder in json stdout exporter to prevent crash #2265

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79df6ec
lock accesses to encoder
lizthegrey Sep 28, 2021
2cf58d6
move locking outside loop to avoid deadlock
lizthegrey Sep 28, 2021
86e5e1d
Update CHANGELOG.md
lizthegrey Sep 28, 2021
3af5989
Merge branch 'main' into lizf.fix-json-crash
lizthegrey Sep 28, 2021
1082e33
Merge branch 'main' into lizf.fix-json-crash
lizthegrey Sep 30, 2021
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3 changes: 3 additions & 0 deletions exporters/stdout/stdouttrace/trace.go
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Expand Up @@ -49,6 +49,7 @@ func New(options ...Option) (*Exporter, error) {
// Exporter is an implementation of trace.SpanSyncer that writes spans to stdout.
type Exporter struct {
encoder *json.Encoder
encoderMu sync.Mutex
timestamps bool

stoppedMu sync.RWMutex
Expand Down Expand Up @@ -83,6 +84,8 @@ func (e *Exporter) ExportSpans(ctx context.Context, spans []trace.ReadOnlySpan)
}

// Encode span stubs, one by one
e.encoderMu.Lock()
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defer e.encoderMu.Unlock()
if err := e.encoder.Encode(stub); err != nil {
return err
}
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