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Resolves #81 - Reduce log levels #92

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merged 2 commits into from
Aug 26, 2017
Merged

Resolves #81 - Reduce log levels #92

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42e41f1
Resolves #81 - Reduce log levels
Aug 14, 2017
e493a9c
Fixup per PR review:
Aug 15, 2017
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35 changes: 18 additions & 17 deletions exporter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -274,7 +274,8 @@ func (b *Exporter) Listen(e <-chan Events) {
// We don't accept negative values for counters. Incrementing the counter with a negative number
// will cause the exporter to panic. Instead we will warn and continue to the next event.
if event.Value() < 0.0 {
log.Errorf("Counter %q is: '%f' (counter must be non-negative value)", metricName, event.Value())
log.Debugf("Counter %q is: '%f' (counter must be non-negative value)", metricName, event.Value())
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This one doesn't seem to have a metric associated with it. But, I don't think it's that important.

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Let's add such a metric/error counter before reducing the log level though. Silently dropping metrics would be very annoying.

eventStats.WithLabelValues("illegal_negative_counter").Inc()
continue
}

Expand All @@ -287,7 +288,7 @@ func (b *Exporter) Listen(e <-chan Events) {

eventStats.WithLabelValues("counter").Inc()
} else {
log.Errorf(regErrF, metricName, err)
log.Debugf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("counter").Inc()
}

Expand All @@ -306,7 +307,7 @@ func (b *Exporter) Listen(e <-chan Events) {

eventStats.WithLabelValues("gauge").Inc()
} else {
log.Errorf(regErrF, metricName, err)
log.Debugf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("gauge").Inc()
}

Expand All @@ -330,7 +331,7 @@ func (b *Exporter) Listen(e <-chan Events) {
histogram.Observe(event.Value())
eventStats.WithLabelValues("timer").Inc()
} else {
log.Errorf(regErrF, metricName, err)
log.Debugf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("timer").Inc()
}

Expand All @@ -343,7 +344,7 @@ func (b *Exporter) Listen(e <-chan Events) {
summary.Observe(event.Value())
eventStats.WithLabelValues("timer").Inc()
} else {
log.Errorf(regErrF, metricName, err)
log.Debugf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("timer").Inc()
}

Expand All @@ -352,7 +353,7 @@ func (b *Exporter) Listen(e <-chan Events) {
}

default:
log.Errorln("Unsupported event type")
log.Debugln("Unsupported event type")
eventStats.WithLabelValues("illegal").Inc()
}
}
Expand Down Expand Up @@ -408,7 +409,7 @@ func parseDogStatsDTagsToLabels(component string) map[string]string {

if len(kv) < 2 || len(kv[1]) == 0 {
networkStats.WithLabelValues("malformed_dogstatsd_tag").Inc()
log.Errorf("Malformed or empty DogStatsD tag %s in component %s", t, component)
log.Debugf("Malformed or empty DogStatsD tag %s in component %s", t, component)
continue
}

Expand All @@ -426,7 +427,7 @@ func lineToEvents(line string) Events {
elements := strings.SplitN(line, ":", 2)
if len(elements) < 2 || len(elements[0]) == 0 || !utf8.ValidString(line) {
networkStats.WithLabelValues("malformed_line").Inc()
log.Errorln("Bad line from StatsD:", line)
log.Debugln("Bad line from StatsD:", line)
return events
}
metric := elements[0]
Expand All @@ -443,7 +444,7 @@ samples:
samplingFactor := 1.0
if len(components) < 2 || len(components) > 4 {
networkStats.WithLabelValues("malformed_component").Inc()
log.Errorln("Bad component on line:", line)
log.Debugln("Bad component on line:", line)
continue
}
valueStr, statType := components[0], components[1]
Expand All @@ -455,7 +456,7 @@ samples:

value, err := strconv.ParseFloat(valueStr, 64)
if err != nil {
log.Errorf("Bad value %s on line: %s", valueStr, line)
log.Debugf("Bad value %s on line: %s", valueStr, line)
networkStats.WithLabelValues("malformed_value").Inc()
continue
}
Expand All @@ -465,7 +466,7 @@ samples:
if len(components) >= 3 {
for _, component := range components[2:] {
if len(component) == 0 {
log.Errorln("Empty component on line: ", line)
log.Debugln("Empty component on line: ", line)
networkStats.WithLabelValues("malformed_component").Inc()
continue samples
}
Expand All @@ -475,13 +476,13 @@ samples:
switch component[0] {
case '@':
if statType != "c" && statType != "ms" {
log.Errorln("Illegal sampling factor for non-counter metric on line", line)
log.Debugln("Illegal sampling factor for non-counter metric on line", line)
networkStats.WithLabelValues("illegal_sample_factor").Inc()
continue
}
samplingFactor, err = strconv.ParseFloat(component[1:], 64)
if err != nil {
log.Errorf("Invalid sampling factor %s on line %s", component[1:], line)
log.Debugf("Invalid sampling factor %s on line %s", component[1:], line)
networkStats.WithLabelValues("invalid_sample_factor").Inc()
}
if samplingFactor == 0 {
Expand All @@ -496,7 +497,7 @@ samples:
case '#':
labels = parseDogStatsDTagsToLabels(component)
default:
log.Errorf("Invalid sampling factor or tag section %s on line %s", components[2], line)
log.Debugf("Invalid sampling factor or tag section %s on line %s", components[2], line)
networkStats.WithLabelValues("invalid_sample_factor").Inc()
continue
}
Expand All @@ -506,7 +507,7 @@ samples:
for i := 0; i < multiplyEvents; i++ {
event, err := buildEvent(statType, metric, value, relative, labels)
if err != nil {
log.Errorf("Error building event on line %s: %s", line, err)
log.Debugf("Error building event on line %s: %s", line, err)
networkStats.WithLabelValues("illegal_event").Inc()
continue
}
Expand Down Expand Up @@ -564,13 +565,13 @@ func (l *StatsDTCPListener) handleConn(c *net.TCPConn, e chan<- Events) {
if err != nil {
if err != io.EOF {
networkStats.WithLabelValues("tcp_error").Inc()
log.Errorf("Read %s failed: %v", c.RemoteAddr(), err)
log.Debugf("Read %s failed: %v", c.RemoteAddr(), err)
}
break
}
if isPrefix {
networkStats.WithLabelValues("tcp_line_too_long").Inc()
log.Errorf("Read %s failed: line too long", c.RemoteAddr())
log.Debugf("Read %s failed: line too long", c.RemoteAddr())
break
}
e <- lineToEvents(string(line))
Expand Down