70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
|
package tracer
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"log"
|
||
|
|
"strconv"
|
||
|
|
)
|
||
|
|
|
||
|
|
var errorPrefix = fmt.Sprintf("Datadog Tracer Error (%s): ", tracerVersion)
|
||
|
|
|
||
|
|
type traceEncodingError struct{ context error }
|
||
|
|
|
||
|
|
func (e *traceEncodingError) Error() string {
|
||
|
|
return fmt.Sprintf("error encoding trace: %s", e.context)
|
||
|
|
}
|
||
|
|
|
||
|
|
type spanBufferFullError struct{}
|
||
|
|
|
||
|
|
func (e *spanBufferFullError) Error() string {
|
||
|
|
return fmt.Sprintf("trace span cap (%d) reached, dropping trace", traceMaxSize)
|
||
|
|
}
|
||
|
|
|
||
|
|
type dataLossError struct {
|
||
|
|
count int // number of items lost
|
||
|
|
context error // any context error, if available
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *dataLossError) Error() string {
|
||
|
|
return fmt.Sprintf("lost traces (count: %d), error: %v", e.count, e.context)
|
||
|
|
}
|
||
|
|
|
||
|
|
type errorSummary struct {
|
||
|
|
Count int
|
||
|
|
Example string
|
||
|
|
}
|
||
|
|
|
||
|
|
func aggregateErrors(errChan <-chan error) map[string]errorSummary {
|
||
|
|
errs := make(map[string]errorSummary, len(errChan))
|
||
|
|
for {
|
||
|
|
select {
|
||
|
|
case err := <-errChan:
|
||
|
|
if err == nil {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
key := fmt.Sprintf("%T", err)
|
||
|
|
summary := errs[key]
|
||
|
|
summary.Count++
|
||
|
|
summary.Example = err.Error()
|
||
|
|
errs[key] = summary
|
||
|
|
default: // stop when there's no more data
|
||
|
|
return errs
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// logErrors logs the errors, preventing log file flooding, when there
|
||
|
|
// are many messages, it caps them and shows a quick summary.
|
||
|
|
// As of today it only logs using standard golang log package, but
|
||
|
|
// later we could send those stats to agent // TODO(ufoot).
|
||
|
|
func logErrors(errChan <-chan error) {
|
||
|
|
errs := aggregateErrors(errChan)
|
||
|
|
for _, v := range errs {
|
||
|
|
var repeat string
|
||
|
|
if v.Count > 1 {
|
||
|
|
repeat = " (repeated " + strconv.Itoa(v.Count) + " times)"
|
||
|
|
}
|
||
|
|
log.Println(errorPrefix + v.Example + repeat)
|
||
|
|
}
|
||
|
|
}
|