suddendust commented on code in PR #12522:
URL: https://github.com/apache/pinot/pull/12522#discussion_r1511662491
##########
pinot-core/src/main/java/org/apache/pinot/core/data/manager/realtime/RealtimeSegmentDataManager.java:
##########
@@ -1661,22 +1666,35 @@ private void makeStreamConsumer(String reason) {
closePartitionGroupConsumer();
}
_segmentLogger.info("Creating new stream consumer for topic partition {} ,
reason: {}", _clientId, reason);
- _partitionGroupConsumer =
- _streamConsumerFactory.createPartitionGroupConsumer(_clientId,
_partitionGroupConsumptionStatus);
- _partitionGroupConsumer.start(_currentOffset);
+ try {
+ _partitionGroupConsumer =
+ _streamConsumerFactory.createPartitionGroupConsumer(_clientId,
_partitionGroupConsumptionStatus);
+ _partitionGroupConsumer.start(_currentOffset);
+ } catch (Exception e) {
+ _segmentLogger.error("Faced exception while trying to recreate stream
consumer for topic partition {} reason {}",
+ _clientId, reason, e);
+ _serverMetrics.addMeteredTableValue(_clientId,
ServerMeter.STREAM_CONSUMER_CREATE_EXCEPTIONS, 1L);
+ throw e;
+ }
}
/**
* Checkpoints existing consumer before creating a new consumer instance
* Assumes there is a valid instance of {@link PartitionGroupConsumer}
*/
private void recreateStreamConsumer(String reason) {
- _segmentLogger.info("Recreating stream consumer for topic partition {},
reason: {}", _clientId, reason);
- _currentOffset = _partitionGroupConsumer.checkpoint(_currentOffset);
- closePartitionGroupConsumer();
- _partitionGroupConsumer =
- _streamConsumerFactory.createPartitionGroupConsumer(_clientId,
_partitionGroupConsumptionStatus);
- _partitionGroupConsumer.start(_currentOffset);
+ try {
+ _segmentLogger.info("Recreating stream consumer for topic partition {},
reason: {}", _clientId, reason);
+ _currentOffset = _partitionGroupConsumer.checkpoint(_currentOffset);
+ closePartitionGroupConsumer();
Review Comment:
>that means the old consumer is still running, may be it can still be used
for consuming data?
I am not sure of the control flow here, if it can be re-used. If it can be
reused, then yes, we shouldn't bump the metric. If it can't, then we should.
But look at it this way: We want to be alerted in both cases because the
control tried creating a new consumer and hoped using that, but it couldn't for
some reason. We def want to look into why we couldn't even close the old
consumer.
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