dengziming opened a new pull request #9622:
URL: https://github.com/apache/kafka/pull/9622


   *More detailed description of your change,
   if necessary. The PR title and PR message become
   the squashed commit message, so use a separate
   comment to ping reviewers.*
   
   1. Bump the version of MetadataReq and MetadataResp, add topicId in 
MetadataResp
   2. Alter describeTopic in AdminClientTopicService and ZookeeperTopicService
   3. TopicMetadata is cached in MetadataCache, so we need to add topicId to 
MetadataCache
   4. MetadataCache is updated by UpdateMetadataRequest, bump the version of 
UpdateMetadataReq and UpdateMetadataResp, add topicId in UpdateMetadataReq.
   
   *Summary of testing strategy (including rationale)
   for the feature or bug fix. Unit and/or integration
   tests are expected for any behaviour change and
   system tests should be considered for larger changes.*
   
   Tested locally, here is some result:
   
   New server + new Client : 
   
   kafka-topics.sh --describe --zookeeper localhost:2181 --topic 
old-version-topic 
   Topic: old-version-topic     TopicId: wRPl6VAlQeyE77bDxEESzg PartitionCount: 
2       ReplicationFactor: 1    Configs: 
        Topic: old-version-topic        Partition: 0    Leader: 0       
Replicas: 0     Isr: 0
        Topic: old-version-topic        Partition: 1    Leader: 0       
Replicas: 0     Isr: 0
   
   kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic 
old-version-topic 
   Topic: old-version-topic     TopicId: wRPl6VAlQeyE77bDxEESzg PartitionCount: 
2       ReplicationFactor: 1    Configs: segment.bytes=1073741824
        Topic: old-version-topic        Partition: 0    Leader: 0       
Replicas: 0     Isr: 0
        Topic: old-version-topic        Partition: 1    Leader: 0       
Replicas: 0     Isr: 0
   
   Old Server + new Client
   
   kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic 
old-version-topic 
   Topic: old-version-topic     TopicId:        PartitionCount: 2       
ReplicationFactor: 1    Configs: segment.bytes=1073741824
        Topic: old-version-topic        Partition: 0    Leader: 0       
Replicas: 0     Isr: 0
        Topic: old-version-topic        Partition: 1    Leader: 0       
Replicas: 0     Isr: 0
   
   New server + old client
   
   kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic 
old-version-topic 
   Topic: old-version-topic     PartitionCount: 2       ReplicationFactor: 1    
Configs: segment.bytes=1073741824
        Topic: old-version-topic        Partition: 0    Leader: 0       
Replicas: 0     Isr: 0
        Topic: old-version-topic        Partition: 1    Leader: 0       
Replicas: 0     Isr: 0
   
   
   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
   - [ ] Verify test coverage and CI build status
   - [ ] Verify documentation (including upgrade notes)
   


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