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From Jean-Baptiste Onofré (JIRA) <>
Subject [jira] [Commented] (BEAM-2185) KafkaIO bounded source
Date Wed, 17 May 2017 00:46:04 GMT


Jean-Baptiste Onofré commented on BEAM-2185:

As a first step, we can imagine to support {{withMaxTime()}} and {{withMaxRecords()}} as we
do on most of the others unbounded IOs. WDYT ?

> KafkaIO bounded source
> ----------------------
>                 Key: BEAM-2185
>                 URL:
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-extensions
>            Reporter: Raghu Angadi
> KafkaIO could be a useful source for batch applications as well. It could implement a
bounded source. The primary question is how the bounds are specified.
> One option : Source specifies a time period (say 9am-10am), and KafkaIO fetches appropriate
start and end offsets based on time-index in Kafka. This would suite many batch applications
that are launched on a scheduled.
> Another option is to always read till the end and commit the offsets to Kafka. Handling
failures and multiple runs of a task might be complicated.

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