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fix: Check response size before add to counter (#35778) 

Related to #35767

prometheus counter cannot add negative value
when response is not written(say timeout/network broken) panicking may
happen if not check

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
pull/35738/head
congqixia 2024-08-29 00:05:00 +08:00 committed by GitHub
parent 1cd9123a6c
commit c5c9ef9876
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1 changed files with 8 additions and 3 deletions
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11
internal/distributed/proxy/service.go
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@ -192,9 +192,14 @@ func (s *Server) startHTTPServer(errChan chan error) {
metrics.RestfulReqLatency.WithLabelValues(
strconv.FormatInt(paramtable.GetNodeID(), 10), path,
).Observe(float64(latency.Milliseconds()))
metrics.RestfulSendBytes.WithLabelValues(
strconv.FormatInt(paramtable.GetNodeID(), 10), path,
).Add(float64(c.Writer.Size()))
// see https://github.com/milvus-io/milvus/issues/35767, counter cannot add negative value
// when response is not written(say timeout/network broken), panicking may happen if not check
if size := c.Writer.Size(); size > 0 {
metrics.RestfulSendBytes.WithLabelValues(
strconv.FormatInt(paramtable.GetNodeID(), 10), path,
).Add(float64(c.Writer.Size()))
}
})
ginHandler.Use(accesslog.AccessLogMiddleware)