[GitHub] [pulsar] wuzhanpeng opened a new issue #11605: Race condition in concurrent schema deletion

[GitBox <gi...@apache.org>]

wuzhanpeng opened a new issue #11605:
URL: https://github.com/apache/pulsar/issues/11605


   **Describe the bug**
   In some scenarios, we deleted topics concurrently, which may trigger some race condition in deleting the same topic schema. For example, in `org.apache.pulsar.broker.service.AbstractTopic#deleteSchema` we will firstly perform `schemaRegistryService#getSchema`(read from bookkeeper) then `schemaRegistryService#deleteSchemaStorage`(delete its corresponding ledgers in bookkeeper). Therefore, when we delete a schema concurrently in two threads, it may happen that one thread has already deleted the ledger, and the other thread has just started executing and throws a "no such ledger" exception.
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1. start a cluster with at least two brokers
   2. create a partitioned topic 'A' with multiple partitions
   3. concurrently delete the non-partitioned topics within topic 'A' with the schema
   4. then you will sporadically see 'No such ledger exists on Bookies' or 'NoNode for /schemas/XX/YY/ZZ' (Note that this phenomenon does not happen every time)
   
   **Expected behavior**
   Broker service can handle these scenarios correctly.
   
   
   


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[GitHub] [pulsar] sijie closed issue #11605: Race condition in concurrent schema deletion

[GitBox <gi...@apache.org>]

sijie closed issue #11605:
URL: https://github.com/apache/pulsar/issues/11605


   


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