[jira] [Created] (SPARK-32118) Use fine-grained read write lock for each database in HiveExternalCatalog

["Lantao Jin (Jira)" <ji...@apache.org>]

Lantao Jin created SPARK-32118:
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             Summary: Use fine-grained read write lock for each database in HiveExternalCatalog
                 Key: SPARK-32118
                 URL: https://issues.apache.org/jira/browse/SPARK-32118
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0, 3.1.0
            Reporter: Lantao Jin


In HiveExternalCatalog, all metastore operations are synchronized by a same object lock. In a heavy traffic Spark thriftserver or Spark Driver, users's queries may be stuck by any a long operation. For example, if a user is accessing a table which contains mass partitions, the operation loadDynamicPartitions() holds the object lock for a long time. All queries are blocking to wait for the lock.



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