Csaba Ringhofer created IMPALA-13950:
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             Summary: Avoid holding metastoreDdlLock_ during DROP TABLE
                 Key: IMPALA-13950
                 URL: https://issues.apache.org/jira/browse/IMPALA-13950
             Project: IMPALA
          Issue Type: Improvement
          Components: Catalog
            Reporter: Csaba Ringhofer


https://github.com/apache/impala/blob/f222574f04fc7b94e1ad514d7d720d50d036a226/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java#L3163

It is problematic to hold the global lock while doing the HMS RPCs as they can 
block for a significant time.



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