HBASE-22758 Remove the unneccesary info cf deletion in DeleteTablePro…

…cedure#deleteFromMeta (#424)

hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java

@@ -1819,7 +1819,8 @@ private static void updateLocation(Connection connection, RegionInfo regionInfo,
    * @param regionInfo region to be deleted from META
    * @throws IOException
    */
-  public static void deleteRegion(Connection connection, RegionInfo regionInfo) throws IOException {
+  public static void deleteRegionInfo(Connection connection, RegionInfo regionInfo)
+      throws IOException {
     long time = EnvironmentEdgeManager.currentTime();
     Delete delete = new Delete(regionInfo.getRegionName());
     delete.addFamily(getCatalogFamily(), time);
@@ -1832,16 +1833,17 @@ public static void deleteRegion(Connection connection, RegionInfo regionInfo) th
    * @param connection connection we're using
    * @param regionsInfo list of regions to be deleted from META
    */
-  public static void deleteRegions(Connection connection, List<RegionInfo> regionsInfo)
+  public static void deleteRegionInfos(Connection connection, List<RegionInfo> regionsInfo)
       throws IOException {
-    deleteRegions(connection, regionsInfo, EnvironmentEdgeManager.currentTime());
+    deleteRegionInfos(connection, regionsInfo, EnvironmentEdgeManager.currentTime());
   }
+
   /**
    * Deletes the specified regions from META.
    * @param connection connection we're using
    * @param regionsInfo list of regions to be deleted from META
    */
-  public static void deleteRegions(Connection connection, List<RegionInfo> regionsInfo, long ts)
+  public static void deleteRegionInfos(Connection connection, List<RegionInfo> regionsInfo, long ts)
       throws IOException {
     List<Delete> deletes = new ArrayList<>(regionsInfo.size());
     for (RegionInfo hri : regionsInfo) {
@@ -1860,11 +1862,11 @@ public static void deleteRegions(Connection connection, List<RegionInfo> regions
    * @param connection connection we're using
    * @param regionInfos list of regions to be added to META
    */
-  public static void overwriteRegions(Connection connection,
-      List<RegionInfo> regionInfos, int regionReplication) throws IOException {
+  public static void overwriteRegions(Connection connection, List<RegionInfo> regionInfos,
+      int regionReplication) throws IOException {
     // use master time for delete marker and the Put
     long now = EnvironmentEdgeManager.currentTime();
-    deleteRegions(connection, regionInfos, now);
+    deleteRegionInfos(connection, regionInfos, now);
     // Why sleep? This is the easiest way to ensure that the previous deletes does not
     // eclipse the following puts, that might happen in the same ts from the server.
     // See HBASE-9906, and HBASE-9879. Once either HBASE-9879, HBASE-8770 is fixed,

hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/GCRegionProcedure.java

@@ -115,7 +115,7 @@ protected Flow executeFromState(MasterProcedureEnv env, GCRegionState state)
               am.getRegionStates().deleteRegion(getRegion());
             }
           }
-          MetaTableAccessor.deleteRegion(masterServices.getConnection(), getRegion());
+          MetaTableAccessor.deleteRegionInfo(masterServices.getConnection(), getRegion());
           masterServices.getServerManager().removeRegion(getRegion());
           FavoredNodesManager fnm = masterServices.getFavoredNodesManager();
           if (fnm != null) {

hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStateStore.java

@@ -260,7 +260,7 @@ public void deleteRegion(final RegionInfo regionInfo) throws IOException {
   }
 
   public void deleteRegions(final List<RegionInfo> regions) throws IOException {
-    MetaTableAccessor.deleteRegions(master.getConnection(), regions);
+    MetaTableAccessor.deleteRegionInfos(master.getConnection(), regions);
   }
 
   // ==========================================================================

hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DeleteTableProcedure.java

@@ -357,12 +357,12 @@ protected static void deleteFromFs(final MasterProcedureEnv env,
   }
 
   /**
-   * There may be items for this table still up in hbase:meta in the case where the
-   * info:regioninfo column was empty because of some write error. Remove ALL rows from hbase:meta
-   * that have to do with this table. See HBASE-12980.
+   * There may be items for this table still up in hbase:meta in the case where the info:regioninfo
+   * column was empty because of some write error. Remove ALL rows from hbase:meta that have to do
+   * with this table. See HBASE-12980.
    */
-  private static void cleanAnyRemainingRows(final MasterProcedureEnv env,
-      final TableName tableName) throws IOException {
+  private static void cleanRegionsInMeta(final MasterProcedureEnv env, final TableName tableName)
+      throws IOException {
     Connection connection = env.getMasterServices().getConnection();
     Scan tableScan = MetaTableAccessor.getScanForTableName(connection, tableName);
     try (Table metaTable = connection.getTable(TableName.META_TABLE_NAME)) {
@@ -373,19 +373,17 @@ private static void cleanAnyRemainingRows(final MasterProcedureEnv env,
         }
       }
       if (!deletes.isEmpty()) {
-        LOG.warn("Deleting some vestigial " + deletes.size() + " rows of " + tableName +
-          " from " + TableName.META_TABLE_NAME);
+        LOG.warn("Deleting some vestigial " + deletes.size() + " rows of " + tableName + " from "
+            + TableName.META_TABLE_NAME);
         metaTable.delete(deletes);
       }
     }
   }
 
-  protected static void deleteFromMeta(final MasterProcedureEnv env,
-      final TableName tableName, List<RegionInfo> regions) throws IOException {
-    MetaTableAccessor.deleteRegions(env.getMasterServices().getConnection(), regions);
-
+  protected static void deleteFromMeta(final MasterProcedureEnv env, final TableName tableName,
+      List<RegionInfo> regions) throws IOException {
     // Clean any remaining rows for this table.
-    cleanAnyRemainingRows(env, tableName);
+    cleanRegionsInMeta(env, tableName);
 
     // clean region references from the server manager
     env.getMasterServices().getServerManager().removeRegions(regions);

hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java

@@ -437,7 +437,7 @@ private void updateMETA(final MasterProcedureEnv env) throws IOException {
       // not overwritten/removed, so you end up with old informations
       // that are not correct after the restore.
       if (regionsToRemove != null) {
-        MetaTableAccessor.deleteRegions(conn, regionsToRemove);
+        MetaTableAccessor.deleteRegionInfos(conn, regionsToRemove);
         deleteRegionsFromInMemoryStates(regionsToRemove, env, regionReplication);
       }
 

hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsckRepair.java

@@ -202,6 +202,6 @@ public static HRegion createHDFSRegionDir(Configuration conf,
    */
   public static void removeParentInMeta(Configuration conf, RegionInfo hri) throws IOException {
     Connection conn = ConnectionFactory.createConnection(conf);
-    MetaTableAccessor.deleteRegion(conn, hri);
+    MetaTableAccessor.deleteRegionInfo(conn, hri);
   }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitorCluster.java

@@ -88,7 +88,7 @@ public void testConsistency() throws IOException {
     assertTrue(report.isEmpty());
     // Now remove first region in table t2 to see if catalogjanitor scan notices.
     List<RegionInfo> t2Ris = MetaTableAccessor.getTableRegions(TEST_UTIL.getConnection(), T2);
-    MetaTableAccessor.deleteRegion(TEST_UTIL.getConnection(), t2Ris.get(0));
+    MetaTableAccessor.deleteRegionInfo(TEST_UTIL.getConnection(), t2Ris.get(0));
     gc = janitor.scan();
     report = janitor.getLastReport();
     assertFalse(report.isEmpty());