Ensure the handling of PartitionMetadataRequest is async end-to-end#5307
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Thanks for fix this. seems some of related UT failed: |
Member
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#4963 is introduced for 2.5.0. so shall this change be marked for 2.5.0? |
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Author
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Yes, I mistakenly tagged for 2.4.2 |
codelipenghui
approved these changes
Oct 8, 2019
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run integration tests |
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Motivation
As part of the changes in #4963, the handling of PartitionMetadataRequest is mix of sync and async operation. This is very bad because we're calling that from IO threads which are used for critical publish tasks.
Several internal methods introduced in that commit are async on the surface, though are blocking in practice.
Additionally, the logic for checking that a topic exists is unnecessarily expensive: fetching the list of topics in a namespace and then iterating through the list to compare with the current topic.
Modifications
Refactored the handling of PartitionMetadataRequest to ensure everything is end-to-end async.