Bruno Cadonna created KAFKA-12817:
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Summary: Make Task ID an Implementation Detail
Key: KAFKA-12817
URL: https://issues.apache.org/jira/browse/KAFKA-12817
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: Bruno Cadonna
Each task has a task ID that is used to identify tasks within Kafka Streams.
The task ID is composed of the subtopology ID it executes and the number of the
partitions the task reads its input data from. This naming scheme is rather an
implementation detail and it is not something user should need to rely on to
get metadata of a task. However, the task ID in this form is used to tag
metrics, in log files, and its representation in code, the {{TaskId}} class is
part of the public API.
This ticket proposes to make the task ID really an implementation detail by:
* removing {{TaskId}} from the public API
* use the subtopology ID and the partition numbers in logs and metrics instead
of the task ID
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