bsyk commented on code in PR #18466:
URL: https://github.com/apache/druid/pull/18466#discussion_r2323552462
##########
indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskRunner.java:
##########
@@ -1717,6 +1717,98 @@ public Response getUnparseableEvents(
return
Response.ok(parseExceptionHandler.getSavedParseExceptionReports()).build();
}
+ @POST
+ @Path("/updateConfig")
+ @Consumes(MediaType.APPLICATION_JSON)
+ @Produces(MediaType.APPLICATION_JSON)
+ public Response updateConfig(TaskConfigUpdateRequest<PartitionIdType,
SequenceOffsetType> req) throws InterruptedException
+ {
+ try {
+ requestPause();
+ checkpointSequences();
+
+ this.ioConfig = req.getIoConfig();
+ this.stream = ioConfig.getStartSequenceNumbers().getStream();
+ this.endOffsets = new
ConcurrentHashMap<>(ioConfig.getEndSequenceNumbers().getPartitionSequenceNumberMap());
+ minMessageTime =
Configs.valueOrDefault(ioConfig.getMinimumMessageTime(), DateTimes.MIN);
+ maxMessageTime =
Configs.valueOrDefault(ioConfig.getMaximumMessageTime(), DateTimes.MAX);
+
+ createNewSequenceFromIoConfig(req.getIoConfig());
+ resume();
+ return Response.ok().build();
+ } catch (Exception e) {
+ log.makeAlert(e, "Failed to update task config");
+ return Response.serverError().entity(e.getMessage()).build();
+ }
+ }
+
+ /**
+ * Creates new sequences for the ingestion process. It currently accepts the
ioConfig given by the request as the correct offsets
+ * and ignores the offsets it may have stored in currOffsets and endOffsets.
+ */
+ private void
createNewSequenceFromIoConfig(SeekableStreamIndexTaskIOConfig<PartitionIdType,
SequenceOffsetType> ioConfig)
Review Comment:
Consider looking at the Kafka
[StickyAssignor](https://kafka.apache.org/21/javadoc/org/apache/kafka/clients/consumer/StickyAssignor.html)
implementation for inspiration here.
The Kafka StickyAssignor is a partition assignment strategy for Kafka
consumers within a consumer group. Its primary goal is to achieve both a
balanced distribution of partitions among consumers and to minimize the
movement of partitions during rebalances.
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