walterddr commented on code in PR #10401:
URL: https://github.com/apache/pinot/pull/10401#discussion_r1132827334
##########
pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/executor/OpChainSchedulerService.java:
##########
@@ -38,15 +40,28 @@
@SuppressWarnings("UnstableApiUsage")
public class OpChainSchedulerService extends AbstractExecutionThreadService {
private static final Logger LOGGER =
LoggerFactory.getLogger(OpChainSchedulerService.class);
- // Default time scheduler is allowed to wait for a runnable OpChain to be
available
+ /**
+ * Default time scheduler is allowed to wait for a runnable OpChain to be
available.
+ */
private static final long DEFAULT_SCHEDULER_NEXT_WAIT_MS = 100;
+ /**
+ * Default cancel signal retention, this should be set to several times
larger than
+ * {@link
org.apache.pinot.query.service.QueryConfig#DEFAULT_SCHEDULER_RELEASE_TIMEOUT_MS}.
+ */
+ private static final long DEFAULT_SCHEDULER_CANCELLATION_SIGNAL_RETENTION_MS
= 60_000L;
private final OpChainScheduler _scheduler;
private final ExecutorService _workerPool;
+ private final Cache<Long, Long> _cancelledRequests;
public OpChainSchedulerService(OpChainScheduler scheduler, ExecutorService
workerPool) {
+ this(scheduler, workerPool,
DEFAULT_SCHEDULER_CANCELLATION_SIGNAL_RETENTION_MS);
+ }
+
+ public OpChainSchedulerService(OpChainScheduler scheduler, ExecutorService
workerPool, long cancelRetentionMs) {
_scheduler = scheduler;
_workerPool = workerPool;
+ _cancelledRequests =
CacheBuilder.newBuilder().expireAfterWrite(cancelRetentionMs,
TimeUnit.MILLISECONDS).build();
Review Comment:
TL;DR this time is not associated with query timeout user set.
long answer:
this is the cancel signal retention in the scheduler. ideally the query
opChain will be waken up in milliseconds. in case of failure/error state it
will be waken up at least once per DEFAULT_SCHEDULER_RELEASE_TIMEOUT_MS (which
is 10second).
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