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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