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https://issues.apache.org/jira/browse/HIVE-23671?focusedWorklogId=452364&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-452364
]
ASF GitHub Bot logged work on HIVE-23671:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Jun/20 14:14
Start Date: 29/Jun/20 14:14
Worklog Time Spent: 10m
Work Description: deniskuzZ commented on a change in pull request #1087:
URL: https://github.com/apache/hive/pull/1087#discussion_r447003871
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStoreChecker.java
##########
@@ -111,24 +120,24 @@ public IMetaStoreClient getMsc() {
* @param partitions
* List of partition name value pairs, if null or empty check all
* partitions
- * @param table
- * @param result
- * Fill this with the results of the check
+ * @param table Table we want to run the check for.
+ * @return Results of the check
* @throws MetastoreException
* Failed to get required information from the metastore.
* @throws IOException
* Most likely filesystem related
*/
- public void checkMetastore(String catName, String dbName, String tableName,
- List<? extends Map<String, String>> partitions, Table table, CheckResult
result)
+ public CheckResult checkMetastore(String catName, String dbName, String
tableName,
+ List<? extends Map<String, String>> partitions, Table table)
throws MetastoreException, IOException {
-
+ CheckResult result = new CheckResult();
if (dbName == null || "".equalsIgnoreCase(dbName)) {
dbName = Warehouse.DEFAULT_DATABASE_NAME;
}
try {
if (tableName == null || "".equals(tableName)) {
+ // TODO: I do not think this is used by anything other than tests
Review comment:
should we answer this question in a current patch?
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Issue Time Tracking
-------------------
Worklog Id: (was: 452364)
Time Spent: 2h 20m (was: 2h 10m)
> MSCK repair should handle transactional tables in certain usecases
> ------------------------------------------------------------------
>
> Key: HIVE-23671
> URL: https://issues.apache.org/jira/browse/HIVE-23671
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Peter Varga
> Assignee: Peter Varga
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> The MSCK REPAIR tool does not handle transactional tables too well. It can
> find and add new partitions the same way as for non-transactional tables, but
> since the writeId differences are not handled, the data can not read back
> from the new partitions.
> We could handle some usecases when the writeIds in the HMS and the underlying
> data are not conflicting. If the HMS does not contains allocated writes for
> the table we can seed the table with the writeIds read from the directory
> structrure.
> Real life use cases could be:
> * Copy data files from one cluster to another with different HMS, create the
> table and call MSCK REPAIR
> * If the HMS db is lost, recreate the table and call MSCK REPAIR
>
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