xche commented on a change in pull request #8577:
URL: https://github.com/apache/pulsar/pull/8577#discussion_r524832000
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File path:
pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/source/PulsarSource.java
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@@ -66,7 +71,7 @@ public void open(Map<String, Object> config, SourceContext
sourceContext) throws
// Setup schemas
log.info("Opening pulsar source with config: {}", pulsarSourceConfig);
Map<String, ConsumerConfig<T>> configs = setupConsumerConfigs();
-
+ consumerExecutor = Executors.newFixedThreadPool(configs.size(),new
DefaultThreadFactory(String.format("%s-%s",sourceContext.getSourceName(),
sourceContext.getInstanceId())));
Review comment:
Because each task instance can consume multiple topics at the same time,
each topic has independent threads, which can ensure that it does not affect
each other and the performance is optimized
If the thread pool size is 1, the normal consumption of other topics will be
blocked because one topic has no data.
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