hudi-agent commented on code in PR #19811:
URL: https://github.com/apache/hudi/pull/19811#discussion_r3951577521
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hudi-utilities/src/main/java/org/apache/hudi/utilities/streamer/HoodieMultiTableStreamer.java:
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@@ -461,28 +484,186 @@ private static String resetTarget(Config configuration,
String database, String
/**
* Creates actual HoodieDeltaStreamer objects for every table/topic and does
incremental sync.
+ *
+ * <p>In continuous mode each table's sync blocks until it is shut down, so
the tables are synced concurrently.
+ * Otherwise the tables are synced sequentially, one after another.
*/
public void sync() {
+ try {
+ if (continuousMode) {
+ syncContinuously();
+ } else {
+ syncSequentially();
+ }
+ } finally {
+ log.info("Ingestion was successful for topics: {}", successTables);
+ if (!failedTables.isEmpty()) {
+ log.info("Ingestion failed for topics: {}", failedTables);
+ }
+ }
+ }
+
+ private void syncSequentially() {
for (TableExecutionContext context : tableExecutionContexts) {
HoodieStreamer streamer = null;
try {
streamer = new HoodieStreamer(context.getConfig(), jssc,
Option.ofNullable(context.getProperties()));
streamer.sync();
successTables.add(Helpers.getTableWithDatabase(context));
- streamer.shutdownGracefully();
} catch (Exception e) {
log.error("error while running MultiTableDeltaStreamer for table: {}",
context.getTableName(), e);
failedTables.add(Helpers.getTableWithDatabase(context));
} finally {
if (streamer != null) {
- streamer.shutdownGracefully();
+ shutdownQuietly(streamer, context);
}
}
}
+ }
+
+ /**
+ * Syncs all tables concurrently, one thread per table. Used for continuous
mode where each table's sync blocks
+ * indefinitely.
+ *
+ * <p>When {@code --fail-fast-on-continuous} is enabled, the first table
failure fails the whole job. The sibling
+ * streamers are shut down and a {@link HoodieException} is thrown so the
caller can exit with a non-zero status.
+ * Otherwise, every table is synced independently and a single failure does
not affect the others.
+ */
+ private void syncContinuously() {
+ if (tableExecutionContexts.isEmpty()) {
+ return;
+ }
+ // Streamer instances are registered from worker threads, so a thread-safe
list is required.
+ final List<HoodieStreamer> streamerInstances = new
CopyOnWriteArrayList<>();
+ // Set once fail fast trips, so tasks that register their streamer
afterwards stop before starting the sync.
+ final AtomicBoolean shutdownRequested = new AtomicBoolean(false);
+ final ExecutorService executor =
Executors.newFixedThreadPool(tableExecutionContexts.size(),
+ new CustomizedThreadFactory("multi-table-streamer", true));
+ boolean terminated = false;
+ try {
+ final List<CompletableFuture<Void>> tableFutures =
tableExecutionContexts.stream()
+ .map(context -> CompletableFuture.runAsync(() -> {
Review Comment:
🤖 nit: have you considered pulling this ~30-line lambda into a named method
like `runTableSync(context, streamerInstances, shutdownRequested)`?
`syncContinuously()` would then read as just setup → submit → await → teardown,
and the per-table registration/fail-fast logic gets its own javadoc.
<sub><i>⚠️ AI-generated; verify before applying. React 👍/👎 to flag
quality.</i></sub>
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