krishan1390 commented on code in PR #16571:
URL: https://github.com/apache/pinot/pull/16571#discussion_r2268492084
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pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/minion/PinotTaskManager.java:
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@@ -739,6 +748,16 @@ protected TaskSchedulingInfo
scheduleTask(PinotTaskGenerator taskGenerator, List
List<PinotTaskConfig> presentTaskConfig =
minionInstanceTagToTaskConfigs.computeIfAbsent(minionInstanceTag,
k -> new ArrayList<>());
taskGenerator.generateTasks(List.of(tableConfig), presentTaskConfig);
+ int maxNumberOfSubTasks = taskGenerator.getMaxNumSubTasks();
+ // choose first maxNumberOfSubTasks tasks to schedule from
presentTaskConfig
+ if (presentTaskConfig.size() > maxNumberOfSubTasks) {
+ LOGGER.warn("Number of tasks generated for task type: {} for table:
{} is {}, which is greater than the "
+ + "maximum number of tasks to schedule: {}. Only the first {}
tasks will be scheduled. This is controlled"
+ + " by the cluster config maxAllowedSubTasks which is set
based on controller's performance",
+ taskType, tableName, presentTaskConfig.size(),
maxNumberOfSubTasks, maxNumberOfSubTasks);
+ presentTaskConfig = presentTaskConfig.subList(0,
maxNumberOfSubTasks);
Review Comment:
suprisingly good catch.
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