jerrypeng commented on a change in pull request #12178:
URL: https://github.com/apache/pulsar/pull/12178#discussion_r716883153
##########
File path:
pulsar-functions/worker/src/main/java/org/apache/pulsar/functions/worker/SchedulerManager.java
##########
@@ -403,6 +545,82 @@ private void scheduleCompaction(ScheduledExecutorService
executor, long schedule
}
}
+ @VisibleForTesting
+ List<Assignment> getCurrentPostDrainAssignments() {
+ return currentPostDrainAssignments;
+ }
+
+ @VisibleForTesting
+ void clearCurrentPostDrainAssignments() {
+ currentPostDrainAssignments = null;
+ }
+
+ @VisibleForTesting
+ List<Assignment> invokeDrain(String workerId) {
+
+ long startTime = System.nanoTime();
+
+ Set<String> availableWorkers = getCurrentAvailableWorkers();
+
+ // workerIdToAssignments is a map of the form {workerId :
{FullyQualifiedInstanceId : Assignment}}
+ Map<String, Map<String, Assignment>> workerIdToAssignments =
functionRuntimeManager.getCurrentAssignments();
+
+ // initialize stats collection
+ SchedulerStats schedulerStats = new
SchedulerStats(workerIdToAssignments, availableWorkers);
+
+ boolean drainSuccessful = false;
+ List<Assignment> postDrainAssignments = null;
+
+ try {
+ // The worker was checked to be among the available ones, by the
caller.
+ Preconditions.checkState(availableWorkers.contains(workerId));
+
+ drainOpStatusMap.put(workerId, DrainOpStatus.DrainInProgress);
+
+ val workerRemovealSuccessful = availableWorkers.remove(workerId);
+ Preconditions.checkState(workerRemovealSuccessful);
+
+ List<FunctionMetaData> allFunctions =
functionMetaDataManager.getAllFunctionMetaData();
+ Map<String, Function.Instance> allInstances =
+ computeAllInstances(allFunctions,
functionRuntimeManager.getRuntimeFactory().externallyManaged());
+
+ // Pretend that current assignments is empty, and get the
instances to assign.
+ Pair<List<Function.Instance>, List<Assignment>> instancesToAssign
+ = getUnassignedFunctionInstances(null, allInstances);
+
+ workerStatsManager.drainTotalExecTimeStart();
+ // Try to schedule the instances on the workers remaining
available after "workerId" is removed.
+ try {
+ postDrainAssignments =
scheduler.schedule(instancesToAssign.getLeft(), null, availableWorkers);
+ } catch (Exception e) {
+ log.info("invokeDrain: Got exception from schedule: ", e);
+ }
+ workerStatsManager.drainTotalExecTimeEnd();
+
+ if (postDrainAssignments != null) {
+ // log.info("drain: postDrainAssignments={}",
postDrainAssignments);
+ for (Assignment assignment : postDrainAssignments) {
+ MessageId messageId = publishNewAssignment(assignment,
false);
+ // Directly update in memory assignment cache since I am
leader
+ // log.info("Drain worker {} - new assignment: {}",
workerId, assignment);
+ functionRuntimeManager.processAssignment(assignment);
+ // update message id associated with current view of
assignments map
+ lastMessageProduced = messageId;
+ // update stats
+ schedulerStats.newAssignment(assignment);
+ }
+ }
+ drainOpStatusMap.put(workerId, DrainOpStatus.DrainCompleted);
+ drainSuccessful = true;
+ } finally {
+ log.info("Draining worker {} was {}successful; summary [] -
execution time: {} sec | stats: {}\n{}",
Review comment:
Missing space "{}" and "successful"
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