Randall Hauch created KAFKA-5741:
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Summary: Prioritize threads in Connect distributed worker process
Key: KAFKA-5741
URL: https://issues.apache.org/jira/browse/KAFKA-5741
Project: Kafka
Issue Type: Improvement
Components: KafkaConnect
Affects Versions: 0.11.0.0
Reporter: Randall Hauch
Priority: Blocker
Connect's distributed worker process uses the {{DistributedHerder}} to perform
all administrative operations, including: starting, stopping, pausing,
resuming, reconfiguring connectors; rebalancing; etc. The {{DistributedHerder}}
uses a single threaded executor service to do all this work and to do it
sequentially. If this thread gets preempted for any reason (e.g., connector
tasks are bogging down the process, DoS, etc.), then the herder's membership in
the group may be dropped, causing a rebalance.
This herder thread should be run at a much higher priority than all of the
other threads in the system.
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