dengzhhu653 commented on code in PR #5929:
URL: https://github.com/apache/hive/pull/5929#discussion_r2196996935
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java:
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@@ -9517,6 +9517,9 @@ public Map<String, String>
updateTableColumnStatistics(ColumnStatistics colStats
// So let's not use them anywhere unless absolutely necessary.
String catName = statsDesc.isSetCatName() ? statsDesc.getCatName() :
getDefaultCatalog(conf);
MTable mTable = ensureGetMTable(catName, statsDesc.getDbName(),
statsDesc.getTableName());
+ lockForUpdate("TBLS", "TBL_ID", "\"TBL_ID\" = " + mTable.getId());
Review Comment:
In this issue we have concurrency updates on the table params, locking on
the `TAB_COL_STATS` (`TBL_ID`, `COLUMN_NAME`) is of no use, we still have the
same issue when updating multi columns stats in parallel.
And the `TAB_COL_STATS` (`TBL_ID`) might not exist, so every client can take
over the lock and proceed in this case, resulting to the same issue.
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