suddendust commented on a change in pull request #7893:
URL: https://github.com/apache/pinot/pull/7893#discussion_r774884333
##########
File path:
pinot-server/src/main/java/org/apache/pinot/server/starter/helix/HelixInstanceDataManager.java
##########
@@ -212,33 +218,45 @@ public void reloadSegment(String tableNameWithType,
String segmentName, boolean
}
@Override
- public void reloadAllSegments(String tableNameWithType, boolean
forceDownload) {
+ public void reloadAllSegments(String tableNameWithType, boolean
forceDownload,
+ SegmentRefreshSemaphore segmentRefreshSemaphore)
+ throws Exception {
LOGGER.info("Reloading all segments in table: {}", tableNameWithType);
TableConfig tableConfig =
ZKMetadataProvider.getTableConfig(_propertyStore, tableNameWithType);
Preconditions.checkNotNull(tableConfig);
-
Schema schema = ZKMetadataProvider.getTableSchema(_propertyStore,
tableNameWithType);
-
List<String> failedSegments = new ArrayList<>();
- Exception sampleException = null;
List<SegmentMetadata> segmentsMetadata =
getAllSegmentsMetadata(tableNameWithType);
- for (SegmentMetadata segmentMetadata : segmentsMetadata) {
+ ExecutorService workers = Executors.newCachedThreadPool();
+ final AtomicReference<Exception> sampleException = new AtomicReference<>();
+ //calling thread hasn't acquired any permit so we don't reload any
segments using it.
+ CompletableFuture.allOf(segmentsMetadata.stream().map(segmentMetadata ->
CompletableFuture.runAsync(() -> {
+ String segmentName = segmentMetadata.getName();
try {
- reloadSegment(tableNameWithType, segmentMetadata, tableConfig, schema,
forceDownload);
+ segmentRefreshSemaphore.acquireSema(segmentMetadata.getName(), LOGGER);
+ try {
+ reloadSegment(tableNameWithType, segmentMetadata, tableConfig,
schema, forceDownload);
+ } catch (Exception e) {
+ LOGGER.error("Caught exception while reloading segment: {} in table:
{}", segmentName, tableNameWithType, e);
+ failedSegments.add(segmentName);
+ sampleException.set(e);
Review comment:
The outside `try-catch` is to handle any `InterruptedException` while
trying to acquire a permit (`acquireSema` throws an `InterruptedException`). If
we put a `finally` in that block it'll try to release a permit in this case
which would be wrong.
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