npawar commented on a change in pull request #6336:
URL: https://github.com/apache/incubator-pinot/pull/6336#discussion_r548249903
##########
File path:
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java
##########
@@ -1777,6 +1779,143 @@ public int reloadSegment(String tableNameWithType,
String segmentName) {
return numMessagesSent;
}
+ /**
+ * Resets a segment by disabling and then enabling the segment
+ */
+ public void resetSegment(String tableNameWithType, String segmentName, long
externalViewWaitTimeMs) {
+ IdealState idealState = getTableIdealState(tableNameWithType);
+ Preconditions.checkState(idealState != null, "Could not find ideal state
for table: %s", tableNameWithType);
+ ExternalView externalView = getTableExternalView(tableNameWithType);
+ Preconditions.checkState(externalView != null, "Could not find external
view for table: %s", tableNameWithType);
+ Set<String> instanceSet = idealState.getInstanceSet(segmentName);
+ Preconditions
+ .checkState(CollectionUtils.isNotEmpty(instanceSet), "Could not find
segment: %s in ideal state for table: %s");
+ Map<String, String> externalViewStateMap =
externalView.getStateMap(segmentName);
+ List<String> partitions = Lists.newArrayList(segmentName);
+
+ // First, disable or reset partition
+ for (String instance : instanceSet) {
+ if (externalViewStateMap == null ||
SegmentStateModel.ERROR.equals(externalViewStateMap.get(instance))) {
+ LOGGER.info("Resetting partition: {} of table: {}", segmentName,
tableNameWithType);
+ _helixAdmin.resetPartition(_helixClusterName, instance,
tableNameWithType, partitions);
+ } else {
+ LOGGER.info("Disabling partition: {} of table: {}", segmentName,
tableNameWithType);
+ _helixAdmin.enablePartition(false, _helixClusterName, instance,
tableNameWithType, partitions);
+ }
+ }
+
+ // Wait for external view to stabilize
+ LOGGER.info("Waiting {} ms for external view to stabilize after
disable/reset of partition: {} of table: {}",
+ externalViewWaitTimeMs, segmentName, tableNameWithType);
+ long startTime = System.currentTimeMillis();
+ Set<String> instancesToCheck = new HashSet<>(instanceSet);
+ while (!instancesToCheck.isEmpty() && System.currentTimeMillis() -
startTime < externalViewWaitTimeMs) {
+ ExternalView newExternalView = getTableExternalView(tableNameWithType);
+ Preconditions
+ .checkState(newExternalView != null, "Could not find external view
for table: %s", tableNameWithType);
+ Map<String, String> newExternalViewStateMap =
newExternalView.getStateMap(segmentName);
+ if (newExternalViewStateMap == null) {
+ continue;
+ }
+ instancesToCheck.removeIf(instance ->
SegmentStateModel.OFFLINE.equals(newExternalViewStateMap.get(instance)));
+ }
+ if (!instancesToCheck.isEmpty()) {
+ throw new IllegalStateException(String.format(
+ "Timed out waiting for external view to stabilize after
disable/reset call. Skipping enable of partition: %s of table: %s",
+ segmentName, tableNameWithType));
+ }
+
+ // Enable partition
+ LOGGER.info("Enabling partition: {} of table: {}", segmentName,
tableNameWithType);
+ for (String instance : instanceSet) {
+ _helixAdmin.enablePartition(true, _helixClusterName, instance,
tableNameWithType, partitions);
+ }
+ }
+
+ /**
+ * Resets all segments of a table by disabling and then enabling the segments
+ */
+ public void resetAllSegments(String tableNameWithType, long
externalViewWaitTimeMs) {
+ IdealState idealState = getTableIdealState(tableNameWithType);
+ Preconditions.checkState(idealState != null, "Could not find ideal state
for table: %s", tableNameWithType);
+ ExternalView externalView = getTableExternalView(tableNameWithType);
+ Preconditions.checkState(externalView != null, "Could not find external
view for table: %s", tableNameWithType);
+
+ Map<String, Set<String>> resetInstanceToPartitionsMap = new HashMap<>();
+ Map<String, Set<String>> disableInstanceToPartitionsMap = new HashMap<>();
+ Map<String, Set<String>> partitionInstancesToCheck = new HashMap<>();
+
+ for (String partition : idealState.getPartitionSet()) {
+ Set<String> instanceSet = idealState.getInstanceSet(partition);
+ Map<String, String> externalViewStateMap =
externalView.getStateMap(partition);
+ for (String instance : instanceSet) {
+ if (externalViewStateMap == null ||
SegmentStateModel.ERROR.equals(externalViewStateMap.get(instance))) {
+ resetInstanceToPartitionsMap.computeIfAbsent(instance, i -> new
HashSet<>()).add(partition);
+ } else {
+ disableInstanceToPartitionsMap.computeIfAbsent(instance, i -> new
HashSet<>()).add(partition);
+ }
+ }
+ partitionInstancesToCheck.put(partition, new HashSet<>(instanceSet));
+ }
+
+ // First, disable/reset the partitions
+ LOGGER.info("Disabling/resetting partitions of table: {}",
tableNameWithType);
+ for (Map.Entry<String, Set<String>> entry :
resetInstanceToPartitionsMap.entrySet()) {
+ ArrayList<String> partitions = Lists.newArrayList(entry.getValue());
+ _helixAdmin.resetPartition(_helixClusterName, entry.getKey(),
tableNameWithType, partitions);
+ }
+ for (Map.Entry<String, Set<String>> entry :
disableInstanceToPartitionsMap.entrySet()) {
+ ArrayList<String> partitions = Lists.newArrayList(entry.getValue());
+ _helixAdmin.enablePartition(false, _helixClusterName, entry.getKey(),
tableNameWithType, partitions);
+ }
+
+ // Wait for external view to stabilize
+ LOGGER.info("Waiting {} ms for external view to stabilize after
disable/reset of partitions of table: {}",
+ externalViewWaitTimeMs, tableNameWithType);
+ long startTime = System.currentTimeMillis();
+ while (!partitionInstancesToCheck.isEmpty() && System.currentTimeMillis()
- startTime < externalViewWaitTimeMs) {
+ ExternalView newExternalView = getTableExternalView(tableNameWithType);
+ Preconditions
Review comment:
Not sure what you mean. This is just a safeguard against table being
deleted in between
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