Alexey Serbin has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/16388 )

Change subject: KUDU-3187: Enhance the HMS plugin to check if synchronization 
is enabled
......................................................................


Patch Set 4:

(6 comments)

http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java
File 
java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java:

http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java@151
PS4, Line 151:     if (skipsValidation()) {
             :       return;
             :     }
nit: does it make sense to move this before tableEvent.getTable() call?


http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java@165
PS4, Line 165: isKuduTable
Why not to perform checkNoKuduProperties() here as well?  Could you add a 
comment clarifying on this?


http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java@166
PS4, Line 166: However, make sure it doesn't have a table id from the context.
Could you add more color on why this is a error condition which needs to be 
handled in this handler?


http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java@168
PS4, Line 168: Kudu table ID does not match the non-Kudu HMS entry
Does it make sense to include table ID (and, maybe, table name from 'table'?) 
into the exception message for easier troubleshooting?


http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java@181
PS4, Line 181:     if (targetTableId == null) {
             :       return;
             :     }
Should this check precede the check at line 165?


http://gerrit.cloudera.org:8080/#/c/16388/4/java/kudu-hive/src/main/java/org/apache/kudu/hive/metastore/KuduMetastorePlugin.java@463
PS4, Line 463:     String masterAddresses = 
table.getParameters().get(KUDU_MASTER_ADDRS_KEY);
             :     if (masterAddresses == null || masterAddresses.isEmpty()) {
             :       // A table without master addresses is not synchronized,
             :       // it may not even be a Kudu table.
             :       return false;
             :     }
nit: could this be separated into a method/function and used here and in 
checkMasterAddrsProperty()?



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ib3588d72af1bb499202b47fca50a08876e13ea37
Gerrit-Change-Number: 16388
Gerrit-PatchSet: 4
Gerrit-Owner: Grant Henke <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Reviewer: Grant Henke <[email protected]>
Gerrit-Reviewer: Greg Solovyev <[email protected]>
Gerrit-Reviewer: Hao Hao <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Comment-Date: Wed, 09 Sep 2020 23:25:03 +0000
Gerrit-HasComments: Yes

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