merlimat opened a new pull request #2203: Make sure schema is initialized before the topic is loaded URL: https://github.com/apache/incubator-pulsar/pull/2203 ### Motivation There is a race condition when the topic creation is triggered by multiple producers at the same with a schema definition. 1. The topic is created correctly and then each producers tries to add the schema 2. One single operation will first create the z-node entry for schema registry (that points to no schema) and then will add the schema 3. Other producers might happen to see the z-node but content will be invalid (ledgerId=-1) ### Modifications * Do the `topic.addSchema()` operation *before* the topic is visible. That will ensure the whole chain of "schema" operations will be done at least once before the topic is finally loaded. After that, each producer/consumer will see at least a valid schema. ### Result This fixes the flakyness in `PartitionedTopicsSchemaTest`
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