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Posted to gitbox@hive.apache.org by "dengzhhu653 (via GitHub)" <gi...@apache.org> on 2026/10/12 08:29:59 UTC

[PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

dengzhhu653 opened a new pull request, #6865:
URL: https://github.com/apache/hive/pull/6865

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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "dengzhhu653 (via GitHub)" <gi...@apache.org>.
dengzhhu653 merged PR #6865:
URL: https://github.com/apache/hive/pull/6865


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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "dengzhhu653 (via GitHub)" <gi...@apache.org>.
dengzhhu653 commented on PR #6865:
URL: https://github.com/apache/hive/pull/6865#issuecomment-6205468545

   Thanks for the review! @DanielZhu58 @saihemanth-cloudera 


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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "dengzhhu653 (via GitHub)" <gi...@apache.org>.
dengzhhu653 commented on code in PR #6865:
URL: https://github.com/apache/hive/pull/6865#discussion_r4289659449


##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/metatool/MetaToolTaskDedupColumns.java:
##########
@@ -110,6 +110,9 @@ private void printSummary(MetaToolObjectStore.DedupColumnsResult result, boolean
         + result.getStorageDescriptorsUpdated());
     if (!isDryRun) {
       System.out.println("Column descriptors removed: " + result.getColumnDescriptorsRemoved());
+      if (result.getTablesValidated() > 0) {
+        System.out.println("Post-commit validation passed for " + result.getTablesValidated() + " table(s).");

Review Comment:
   this is the new feature that hasn't been released yet, so the user shouldn't aware of the changes



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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "sonarqubecloud[bot] (via GitHub)" <gi...@apache.org>.
sonarqubecloud[bot] commented on PR #6865:
URL: https://github.com/apache/hive/pull/6865#issuecomment-6135715462

   ## [![Quality Gate Passed](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/checks/QualityGateBadge/qg-passed-20px.png 'Quality Gate Passed')](https://sonarcloud.io/dashboard?id=apache_hive&pullRequest=6865) **Quality Gate passed**  
   Issues  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [6 New issues](https://sonarcloud.io/project/issues?id=apache_hive&pullRequest=6865&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/accepted-16px.png '') [0 Accepted issues](https://sonarcloud.io/project/issues?id=apache_hive&pullRequest=6865&issueStatuses=ACCEPTED)
   
   Measures  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0 Security Hotspots](https://sonarcloud.io/project/security_hotspots?id=apache_hive&pullRequest=6865&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0.0% Coverage on New Code](https://sonarcloud.io/component_measures?id=apache_hive&pullRequest=6865&metric=new_coverage&view=list)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0.0% Duplication on New Code](https://sonarcloud.io/component_measures?id=apache_hive&pullRequest=6865&metric=new_duplicated_lines_density&view=list)  
     
   <!-- sqra-placement-anchor -->
   [See analysis details on SonarQube Cloud](https://sonarcloud.io/dashboard?id=apache_hive&pullRequest=6865)
   
   


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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "Copilot (via GitHub)" <gi...@apache.org>.
Copilot commented on code in PR #6865:
URL: https://github.com/apache/hive/pull/6865#discussion_r4253226743


##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/ColumnDeduplicator.java:
##########
@@ -278,7 +299,87 @@ private Map<Long, List<FieldSchema>> loadColumnSchemas(Set<Long> cdIds) {
     return result;
   }
 
-  private static Map<List<FieldSchema>, List<Long>> groupByColumnSchema(Map<Long, List<FieldSchema>> cdColumns) {
+  private List<PartitionSchemaSnapshot> capturePartitionSchemas(List<Map.Entry<PartitionSdInfo, Long>> updates) {
+    List<PartitionSchemaSnapshot> snapshots = new ArrayList<>(updates.size());
+    for (Map.Entry<PartitionSdInfo, Long> update: updates) {
+      PartitionSdInfo psi = update.getKey();
+      snapshots.add(new PartitionSchemaSnapshot(
+          psi.partId,
+          convertToFieldSchemas(psi.sd.getCD().getCols())));

Review Comment:
   The validation snapshot records only the pre-update schema, not the canonical CD ID from `update.getValue()`. If an SD remap is not persisted, the partition still exposes the same schema through its old duplicate CD, so this check passes and `tablesValidated` is incremented even though de-duplication did not occur. Record the expected canonical CD ID in each snapshot and compare it with the reloaded `partition.cdId` in addition to comparing schemas.



##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/ColumnDeduplicator.java:
##########
@@ -93,6 +96,16 @@ MetaToolObjectStore.DedupColumnsResult run(String catalogFilter, String dbFilter
           }
         }
       }
+
+      try {
+        if (committed && validation != null) {
+          validateTableAfterDedup(table, validation.schemaSnapshots());
+          result.incrementTablesValidated();
+        }
+      } catch (MetaException e) {
+        result.catchException(new IllegalStateException("Failed to validate the column deduplication for this table: " + table, e));

Review Comment:
   The validation query can throw unchecked JDO/database exceptions, but this catches only `MetaException`. Such failures escape `run()`, bypass `DedupColumnsResult`, and prevent `MetaToolTaskDedupColumns` from printing the result summary and its normal wrapped failure. Catch `Exception` here, as the mutation phase already does, so every validation failure follows the same result contract.



##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/metatool/MetaToolTaskDedupColumns.java:
##########
@@ -110,6 +110,9 @@ private void printSummary(MetaToolObjectStore.DedupColumnsResult result, boolean
         + result.getStorageDescriptorsUpdated());
     if (!isDryRun) {
       System.out.println("Column descriptors removed: " + result.getColumnDescriptorsRemoved());
+      if (result.getTablesValidated() > 0) {
+        System.out.println("Post-commit validation passed for " + result.getTablesValidated() + " table(s).");
+      }

Review Comment:
   This adds observable CLI output for live runs, while the PR description says the change has no user-facing impact. Please update the PR's user-facing-change section to mention the new validation summary (and the updated command help) so release reviewers and users are not given conflicting information.



##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/ColumnDeduplicator.java:
##########
@@ -278,7 +299,87 @@ private Map<Long, List<FieldSchema>> loadColumnSchemas(Set<Long> cdIds) {
     return result;
   }
 
-  private static Map<List<FieldSchema>, List<Long>> groupByColumnSchema(Map<Long, List<FieldSchema>> cdColumns) {
+  private List<PartitionSchemaSnapshot> capturePartitionSchemas(List<Map.Entry<PartitionSdInfo, Long>> updates) {
+    List<PartitionSchemaSnapshot> snapshots = new ArrayList<>(updates.size());
+    for (Map.Entry<PartitionSdInfo, Long> update: updates) {
+      PartitionSdInfo psi = update.getKey();
+      snapshots.add(new PartitionSchemaSnapshot(
+          psi.partId,
+          convertToFieldSchemas(psi.sd.getCD().getCols())));
+    }
+    return snapshots;
+  }
+
+  public void validateTableAfterDedup(TableInfo table, List<PartitionSchemaSnapshot> before)
+      throws MetaException {
+    List<PartitionSdInfo> partitions =
+        loadPartitionCdRefs(before.stream().map(b -> b.partitionId).toList());

Review Comment:
   This sends every updated partition ID in one JDO collection query. Large partitioned tables can exceed backend/generated-query limits after the de-duplication transaction has already committed, causing the command to report a validation failure for a successful mutation. Please batch this reload with `Batchable.runBatched` using the raw-store JDO batch setting; `MetastoreConf.RAWSTORE_PARTITION_BATCH_SIZE` explicitly exists for generated JDO queries that become too large (MetastoreConf.java:1826-1830), and analogous ID-list reads are batched in `DirectSqlUpdatePart.java:670-687`.



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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "sonarqubecloud[bot] (via GitHub)" <gi...@apache.org>.
sonarqubecloud[bot] commented on PR #6865:
URL: https://github.com/apache/hive/pull/6865#issuecomment-6143645379

   ## [![Quality Gate Passed](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/checks/QualityGateBadge/qg-passed-20px.png 'Quality Gate Passed')](https://sonarcloud.io/dashboard?id=apache_hive&pullRequest=6865) **Quality Gate passed**  
   Issues  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [6 New issues](https://sonarcloud.io/project/issues?id=apache_hive&pullRequest=6865&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/accepted-16px.png '') [0 Accepted issues](https://sonarcloud.io/project/issues?id=apache_hive&pullRequest=6865&issueStatuses=ACCEPTED)
   
   Measures  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0 Security Hotspots](https://sonarcloud.io/project/security_hotspots?id=apache_hive&pullRequest=6865&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0.0% Coverage on New Code](https://sonarcloud.io/component_measures?id=apache_hive&pullRequest=6865&metric=new_coverage&view=list)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0.0% Duplication on New Code](https://sonarcloud.io/component_measures?id=apache_hive&pullRequest=6865&metric=new_duplicated_lines_density&view=list)  
     
   <!-- sqra-placement-anchor -->
   [See analysis details on SonarQube Cloud](https://sonarcloud.io/dashboard?id=apache_hive&pullRequest=6865)
   
   


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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "sonarqubecloud[bot] (via GitHub)" <gi...@apache.org>.
sonarqubecloud[bot] commented on PR #6865:
URL: https://github.com/apache/hive/pull/6865#issuecomment-6122860173

   ## [![Quality Gate Passed](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/checks/QualityGateBadge/qg-passed-20px.png 'Quality Gate Passed')](https://sonarcloud.io/dashboard?id=apache_hive&pullRequest=6865) **Quality Gate passed**  
   Issues  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [6 New issues](https://sonarcloud.io/project/issues?id=apache_hive&pullRequest=6865&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/accepted-16px.png '') [0 Accepted issues](https://sonarcloud.io/project/issues?id=apache_hive&pullRequest=6865&issueStatuses=ACCEPTED)
   
   Measures  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0 Security Hotspots](https://sonarcloud.io/project/security_hotspots?id=apache_hive&pullRequest=6865&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [0.0% Coverage on New Code](https://sonarcloud.io/component_measures?id=apache_hive&pullRequest=6865&metric=new_coverage&view=list)  
   ![](https://sonarsource.github.io/sonarcloud-github-static-resources/v2/common/passed-16px.png '') [1.4% Duplication on New Code](https://sonarcloud.io/component_measures?id=apache_hive&pullRequest=6865&metric=new_duplicated_lines_density&view=list)  
     
   <!-- sqra-placement-anchor -->
   [See analysis details on SonarQube Cloud](https://sonarcloud.io/dashboard?id=apache_hive&pullRequest=6865)
   
   


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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "Copilot (via GitHub)" <gi...@apache.org>.
Copilot commented on code in PR #6865:
URL: https://github.com/apache/hive/pull/6865#discussion_r4254801699


##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/ColumnDeduplicator.java:
##########
@@ -106,57 +119,53 @@ MetaToolObjectStore.DedupColumnsResult run(String catalogFilter, String dbFilter
     return result;
   }
 
-  private void deduplicateTable(TableInfo table, MetaToolObjectStore.DedupColumnsResult result) {
+  private PostCommitValidation deduplicateTable(TableInfo table, MetaToolObjectStore.DedupColumnsResult result)
+      throws MetaException {
     List<PartitionSdInfo> partitionSds = loadPartitionStorageDescriptors(table.tableId);
     if (partitionSds.isEmpty()) {
-      return;
+      return null;
     }
 
     Set<Long> cdIds = partitionSds.stream().map(p -> p.cdId).collect(Collectors.toSet());
     cdIds.add(table.tableCdId);
-
-    Map<Long, List<FieldSchema>> cdColumns = loadColumnSchemas(cdIds);
-    Map<List<FieldSchema>, List<Long>> groups = groupByColumnSchema(cdColumns);
+    Map<List<FieldSchema>, Set<Long>> groups = groupByColumnSchema(cdIds);
 
     Map<Long, Long> cdRemap = new HashMap<>();
-    for (List<Long> group : groups.values()) {
+    for (Set<Long> group : groups.values()) {
       if (group.size() <= 1) {
         continue;
       }
-      long canonicalCdId = pickCanonicalCdId(new HashSet<>(group), table.tableCdId, partitionSds);
+      long canonicalCdId = pickCanonicalCdId(group, table.tableCdId, partitionSds);
       for (long cdId : group) {
         if (cdId != canonicalCdId) {
           cdRemap.put(cdId, canonicalCdId);
         }
       }
     }
 
-    if (cdRemap.isEmpty()) {
-      return;
-    }
-
     List<Map.Entry<PartitionSdInfo, Long>> partSdUpdates = buildPartitionUpdates(partitionSds, cdRemap);
     if (partSdUpdates.isEmpty()) {
-      return;
+      return null;
     }
-
     result.incrementTablesWithDuplicates();
     for (Map.Entry<PartitionSdInfo, Long> update : partSdUpdates) {
       result.incrementStorageDescriptorsUpdated();
       if (isVerbose) {
         PartitionSdInfo partSd = update.getKey();
         long newCdId = update.getValue();
-        result.addDetail(String.format("table %s.%s.%s: SD %s CD %d -> %d",
-            table.catalogName, table.dbName, table.tableName,
-            JDOHelper.getObjectId(partSd.sd), partSd.cdId, newCdId));
+        result.addDetail(String.format("table %s.%s.%s: CD %d -> %d",
+            table.catalogName, table.dbName, table.tableName, partSd.cdId, newCdId));

Review Comment:
   The `-verbose` option is documented as printing per-partition details, but removing the SD identifier leaves no partition identifier here; multiple partitions with the same remap now produce indistinguishable lines. Include the newly available partition ID in each detail.
   
   This issue also appears in the following locations of the same file:
   - line 353
   - line 423



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Re: [PR] HIVE-30100: Post-run integrity checks for metatool column de-duplication [hive]

Posted by "saihemanth-cloudera (via GitHub)" <gi...@apache.org>.
saihemanth-cloudera commented on code in PR #6865:
URL: https://github.com/apache/hive/pull/6865#discussion_r4289522785


##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/tools/metatool/MetaToolTaskDedupColumns.java:
##########
@@ -110,6 +110,9 @@ private void printSummary(MetaToolObjectStore.DedupColumnsResult result, boolean
         + result.getStorageDescriptorsUpdated());
     if (!isDryRun) {
       System.out.println("Column descriptors removed: " + result.getColumnDescriptorsRemoved());
+      if (result.getTablesValidated() > 0) {
+        System.out.println("Post-commit validation passed for " + result.getTablesValidated() + " table(s).");

Review Comment:
   nit: this adds visible CLI output, so the “user-facing change” section should probably mention it?



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