Status

Current state: Under  Discarded

Discussion thread: here

Discussion Vote thread: here

JIRA: KAFKA-6725

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

...

After some code analysis, we determined that there wasn't an existing API that a Connector could use to determine that the task was about to be shut down for a rebalance. After some thought we decided that this was a problem more generally about giving connectors the information about the state of the world outside the connector such that they could make intelligent decisions about how to behave in preCommit. Giving this information to a connector gives developers writing connectors options to change their behavior if a rebalance or shutdown is pending.

We To achieve this we would like to add such an API so that the preCommit hook of a Connector can decide if it should behave differently because the task is actively trying to shut down.

...

• We considered adding a closing parameter to preCommit, but that would be a breaking change unless it was done very carefully. The additional complexity would buy us marginal extra value, if any at all, so we decided to go with the addition to the context object.

...