mqliang commented on a change in pull request #7368:
URL: https://github.com/apache/pinot/pull/7368#discussion_r718894821
##########
File path:
pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/mergerollup/MergeRollupTaskGenerator.java
##########
@@ -463,4 +490,71 @@ private long getWatermarkMs(long minStartTimeMs, long
bucketMs, String mergeLeve
return pinotTaskConfigs;
}
+
+ private long getMergeRollupTaskDelayInNumTimeBuckets(long watermarkMs, long
bufferTimeMs, long bucketTimeMs) {
+ if (bufferTimeMs == 0 || watermarkMs == -1) {
+ return 0;
+ }
+ return (long) Math.floor((System.currentTimeMillis() - watermarkMs -
bufferTimeMs) / (double) bucketTimeMs);
+ }
+
+ private void setWatermarkMs(String tableNameWithType, String mergeLevel,
long watermarkMs, long bufferTimeMs,
+ long bucketTimeMs) {
+ LOGGER.info(
+ "Setting watermark for table: {} and mergeLevel: {} is {}
(watermarkMs={}, bufferTimeMs={}, bucketTimeMs={})",
+ tableNameWithType, mergeLevel,
getMergeRollupTaskDelayInNumTimeBuckets(watermarkMs, bufferTimeMs,
bucketTimeMs),
+ watermarkMs, bucketTimeMs, bucketTimeMs);
+
+ ControllerMetrics controllerMetrics =
_clusterInfoAccessor.getControllerMetrics();
+ if (controllerMetrics == null) {
+ return;
+ }
+
+ PinotMetricsRegistry metricsRegistry =
controllerMetrics.getMetricsRegistry();
+ if (metricsRegistry == null) {
+ return;
+ }
+
+ // Update gauge value that indicates the delay in terms of the number of
time buckets.
+ _mergeRollupWatermarks.computeIfAbsent(tableNameWithType, k -> new
HashMap<>());
+ Map<String, Long> watermarkForTable =
_mergeRollupWatermarks.get(tableNameWithType);
+
+ watermarkForTable.compute(mergeLevel, (k, v) -> {
+ if (v == null) {
+
controllerMetrics.addCallbackGaugeIfNeeded(getMetricNameForTaskDelay(tableNameWithType,
mergeLevel),
+ (() ->
getMergeRollupTaskDelayInNumTimeBuckets(watermarkForTable.getOrDefault(k, -1L),
bufferTimeMs,
+ bucketTimeMs)));
+ }
Review comment:
Do we need add a `else` block here which remove the old CallbackGauge
and add a new CallbackGauge when `v != null`?
##########
File path:
pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/mergerollup/MergeRollupTaskGenerator.java
##########
@@ -463,4 +490,71 @@ private long getWatermarkMs(long minStartTimeMs, long
bucketMs, String mergeLeve
return pinotTaskConfigs;
}
+
+ private long getMergeRollupTaskDelayInNumTimeBuckets(long watermarkMs, long
bufferTimeMs, long bucketTimeMs) {
+ if (bufferTimeMs == 0 || watermarkMs == -1) {
+ return 0;
+ }
+ return (long) Math.floor((System.currentTimeMillis() - watermarkMs -
bufferTimeMs) / (double) bucketTimeMs);
Review comment:
Is it possible that `bucketTimeMs ` be 0? which will cause "divide by
zero" exception.
##########
File path:
pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/mergerollup/MergeRollupTaskGenerator.java
##########
@@ -339,6 +351,21 @@ public String getTaskType() {
.info("Finished generating task configs for table: {} for task: {},
numTasks: {}", offlineTableName, taskType,
pinotTaskConfigsForTable.size());
}
+
+ // Reset watermarks for invalid tables. This covers the metrics clean up
when the table is removed or the merge
+ // config is added and then removed.
+ LeadControllerManager leadControllerManager =
_clusterInfoAccessor.getLeaderControllerManager();
Review comment:
L385-L268 can be changed as
```
for (String tableNameWithType : _mergeRollupWatermarks.keySet()) {
if (!leadControllerManager.isLeaderForTable(tableNameWithType)) {
resetWatermarkMs(tableNameWithType);
}
}
```
Since _mergeRollupWatermarks is a HashMap, so looping over
_mergeRollupWatermarks.keySet() will not iterating duplicate keys, so the
`!candidateMergeTables.contains(tableNameWithType)` check is not needed.
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