Tianyi Wang has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/8752 )

Change subject: IMPALA-5058: Improve the concurrency of DDL/DML operations
......................................................................


Patch Set 1:

(2 comments)

metadata/test_metadata_query_statements.py::TestMetadataQueryStatements::test_show_data_sources
 doesn't pass on my machine. See the inline comments:

http://gerrit.cloudera.org:8080/#/c/8752/1/fe/src/main/java/org/apache/impala/catalog/CatalogObjectCache.java
File fe/src/main/java/org/apache/impala/catalog/CatalogObjectCache.java:

http://gerrit.cloudera.org:8080/#/c/8752/1/fe/src/main/java/org/apache/impala/catalog/CatalogObjectCache.java@75
PS1, Line 75:       CatalogObjectVersionQueue.INSTANCE.addCatalogObjectVersion(
catalogObject.getCatalogVersion() is used here


http://gerrit.cloudera.org:8080/#/c/8752/1/fe/src/main/java/org/apache/impala/catalog/CatalogServiceCatalog.java
File fe/src/main/java/org/apache/impala/catalog/CatalogServiceCatalog.java:

http://gerrit.cloudera.org:8080/#/c/8752/1/fe/src/main/java/org/apache/impala/catalog/CatalogServiceCatalog.java@1467
PS1, Line 1467:         
dataSource.setCatalogVersion(incrementAndGetCatalogVersion());
Here add() is called before setCatalogVersion(), so the version could be 
uninitialized in add(). Is this correct behavior?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: If12467a83acaeca6a127491d89291dedba91a35a
Gerrit-Change-Number: 8752
Gerrit-PatchSet: 1
Gerrit-Owner: Dimitris Tsirogiannis <[email protected]>
Gerrit-Reviewer: Alex Behm <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Tianyi Wang <[email protected]>
Gerrit-Comment-Date: Fri, 08 Dec 2017 01:48:49 +0000
Gerrit-HasComments: Yes

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