zentol commented on a change in pull request #6850: [FLINK-10252] Handle
oversized metric messges
URL: https://github.com/apache/flink/pull/6850#discussion_r226616012
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/dump/MetricDumpSerialization.java
##########
@@ -124,55 +146,125 @@ public MetricSerializationResult serialize(
Map<Counter, Tuple2<QueryScopeInfo, String>> counters,
Map<Gauge<?>, Tuple2<QueryScopeInfo, String>> gauges,
Map<Histogram, Tuple2<QueryScopeInfo, String>>
histograms,
- Map<Meter, Tuple2<QueryScopeInfo, String>> meters) {
+ Map<Meter, Tuple2<QueryScopeInfo, String>> meters,
+ long maximumFramesize,
+ MetricQueryService queryService) {
- buffer.clear();
+ boolean unregisterRemainingMetrics = false;
+ countersBuffer.clear();
int numCounters = 0;
for (Map.Entry<Counter, Tuple2<QueryScopeInfo, String>>
entry : counters.entrySet()) {
+ if (unregisterRemainingMetrics) {
+ queryService.unregister(entry.getKey());
+ continue;
+ }
+
try {
- serializeCounter(buffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
+ serializeCounter(countersBuffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
numCounters++;
+ if (countersBuffer.length() >
maximumFramesize) {
+ LOG.warn("The serialized
counter metric is larger than the maximum frame size, " +
+ " so maybe not all
metrics would be reported.");
+ unregisterRemainingMetrics =
true;
+ //clear all, because we can not
revoke the latest metrics which caused overflow
+
queryService.unregister(entry.getKey());
+ countersBuffer.clear();
+ numCounters = 0;
+ }
} catch (Exception e) {
LOG.debug("Failed to serialize
counter.", e);
}
}
+ gaugesBuffer.clear();
int numGauges = 0;
for (Map.Entry<Gauge<?>, Tuple2<QueryScopeInfo,
String>> entry : gauges.entrySet()) {
+ if (unregisterRemainingMetrics) {
+ queryService.unregister(entry.getKey());
+ continue;
+ }
+
try {
- serializeGauge(buffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
+ serializeGauge(gaugesBuffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
numGauges++;
+ if (gaugesBuffer.length() >
maximumFramesize) {
+ LOG.warn("The serialized gauge
metric is larger than the maximum frame size, " +
+ " so maybe not all
metrics would be reported.");
+ unregisterRemainingMetrics =
true;
+
queryService.unregister(entry.getKey());
+ gaugesBuffer.clear();
+ numGauges = 0;
+ }
} catch (Exception e) {
LOG.debug("Failed to serialize gauge.",
e);
}
}
- int numHistograms = 0;
- for (Map.Entry<Histogram, Tuple2<QueryScopeInfo,
String>> entry : histograms.entrySet()) {
+ metersBuffer.clear();
+ int numMeters = 0;
+ for (Map.Entry<Meter, Tuple2<QueryScopeInfo, String>>
entry : meters.entrySet()) {
+ if (unregisterRemainingMetrics) {
+ queryService.unregister(entry.getKey());
+ continue;
+ }
+
try {
- serializeHistogram(buffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
- numHistograms++;
+ serializeMeter(metersBuffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
+ numMeters++;
+ if (metersBuffer.length() >
maximumFramesize) {
+ LOG.warn("The serialized meter
metric is larger than the maximum frame size, " +
+ " so maybe not all
metrics would be reported.");
+ unregisterRemainingMetrics =
true;
+
queryService.unregister(entry.getKey());
+ metersBuffer.clear();
+ numMeters = 0;
+ }
} catch (Exception e) {
- LOG.debug("Failed to serialize
histogram.", e);
+ LOG.debug("Failed to serialize meter.",
e);
}
}
- int numMeters = 0;
- for (Map.Entry<Meter, Tuple2<QueryScopeInfo, String>>
entry : meters.entrySet()) {
+ histogramsBuffer.clear();
+ int numHistograms = 0;
+ for (Map.Entry<Histogram, Tuple2<QueryScopeInfo,
String>> entry : histograms.entrySet()) {
+ if (unregisterRemainingMetrics) {
+ queryService.unregister(entry.getKey());
+ continue;
+ }
+
try {
- serializeMeter(buffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
- numMeters++;
+ serializeHistogram(histogramsBuffer,
entry.getValue().f0, entry.getValue().f1, entry.getKey());
Review comment:
the re-ordering is not necessary if the decision is left to the MQS.
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