mq.receive.max.poll.time.ms, to limit the maximum time spent polling messages in a Kafka Connect task cycle #153
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Joel-hanson
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dalelane
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Jun 29, 2025
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I've suggested a small refactoring that means we do the sum once up-front, and then just a straight comparison every time around the loop (rather than doing the sum in every loop). In practice, I suspect the performance impact of such a micro-optimisation will be minimal, so feel free to ignore.
Otherwise this all looks good to me, thanks!
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| log.debug("Polling for records"); | ||
| final long startTime = System.currentTimeMillis(); |
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Suggested change
| final long startTime = System.currentTimeMillis(); | |
| final long pollEndTime = System.currentTimeMillis() + maxPollTime; |
| message != null && | ||
| localList.size() < numberOfMessagesToBePolled && | ||
| !stopNow.get() && | ||
| (maxPollTime <= 0 || (System.currentTimeMillis() - startTime) < maxPollTime) |
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Suggested change
| (maxPollTime <= 0 || (System.currentTimeMillis() - startTime) < maxPollTime) | |
| (maxPollTime <= 0 || (System.currentTimeMillis() < pollEndTime) |
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July 24, 2025 12:15
- Maximum time (in milliseconds) to spend polling messages before returning a batch to Kafka. Signed-off-by: Joel Hanson <joelhanson025@gmail.com>
Signed-off-by: Joel Hanson <joelhanson025@gmail.com>
Signed-off-by: A S Adil Mohammad <asadilmohammad2020@gmail.com>
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This pull request introduces a new configuration option,
mq.receive.max.poll.time.ms, to limit the maximum time spent polling messages in a Kafka Connect task cycle. It also includes updates to the implementation and tests to support this feature.New Configuration Option:
mq.receive.max.poll.time.msto define the maximum time (in milliseconds) for polling messages during a Kafka Connect task cycle. If set to0, polling continues until the batch size is met or no more messages are available. This configuration is documented in theREADME.mdand integrated into the connector's configuration definitions.Implementation Updates:
MQSourceTaskclass to use the newmq.receive.max.poll.time.msconfiguration. The polling logic now respects the maximum poll time, ensuring the task terminates polling early if the time limit is reached.Testing Enhancements:
MQSourceTaskIT.javato validate the behavior of themq.receive.max.poll.time.msconfiguration under different scenarios, such as terminating early, respecting batch size, and handling a value of0.These changes improve the flexibility and control of the Kafka Connect source connector for IBM MQ, allowing users to fine-tune message polling behavior.# Description
Type of change
How Has This Been Tested?
Checklist