HBASE-26881 Backport HBASE-25368 to branch-2 (#4267)

Signed-off-by: Andrew Purtell <apurtell@apache.org>

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

@@ -2394,51 +2394,55 @@ class RawAsyncHBaseAdmin implements AsyncAdmin {
     if (regionNameOrEncodedRegionName == null) {
       return failedFuture(new IllegalArgumentException("Passed region name can't be null"));
     }
-    try {
+
-      CompletableFuture<Optional<HRegionLocation>> future;
+    CompletableFuture<Optional<HRegionLocation>> future;
-      if (RegionInfo.isEncodedRegionName(regionNameOrEncodedRegionName)) {
+    if (RegionInfo.isEncodedRegionName(regionNameOrEncodedRegionName)) {
-        String encodedName = Bytes.toString(regionNameOrEncodedRegionName);
+      String encodedName = Bytes.toString(regionNameOrEncodedRegionName);
-        if (encodedName.length() < RegionInfo.MD5_HEX_LENGTH) {
+      if (encodedName.length() < RegionInfo.MD5_HEX_LENGTH) {
-          // old format encodedName, should be meta region
+        // old format encodedName, should be meta region
-          future = connection.registry.getMetaRegionLocations()
+        future = connection.registry.getMetaRegionLocations()
-            .thenApply(locs -> Stream.of(locs.getRegionLocations())
+          .thenApply(locs -> Stream.of(locs.getRegionLocations())
-              .filter(loc -> loc.getRegion().getEncodedName().equals(encodedName)).findFirst());
+            .filter(loc -> loc.getRegion().getEncodedName().equals(encodedName)).findFirst());
-        } else {
-          future = AsyncMetaTableAccessor.getRegionLocationWithEncodedName(metaTable,
-            regionNameOrEncodedRegionName);
-        }
       } else {
-        RegionInfo regionInfo =
+        future = AsyncMetaTableAccessor.getRegionLocationWithEncodedName(metaTable,
-          MetaTableAccessor.parseRegionInfoFromRegionName(regionNameOrEncodedRegionName);
+          regionNameOrEncodedRegionName);
-        if (regionInfo.isMetaRegion()) {
+      }
-          future = connection.registry.getMetaRegionLocations()
+    } else {
-            .thenApply(locs -> Stream.of(locs.getRegionLocations())
+      // Not all regionNameOrEncodedRegionName here is going to be a valid region name,
-              .filter(loc -> loc.getRegion().getReplicaId() == regionInfo.getReplicaId())
+      // it needs to throw out IllegalArgumentException in case tableName is passed in.
-              .findFirst());
+      RegionInfo regionInfo;
-        } else {
+      try {
-          future =
+        regionInfo = MetaTableAccessor.parseRegionInfoFromRegionName(regionNameOrEncodedRegionName);
-            AsyncMetaTableAccessor.getRegionLocation(metaTable, regionNameOrEncodedRegionName);
+      } catch (IOException ioe) {
-        }
+        return failedFuture(new IllegalArgumentException(ioe.getMessage()));
       }
 
-      CompletableFuture<HRegionLocation> returnedFuture = new CompletableFuture<>();
+      if (regionInfo.isMetaRegion()) {
-      addListener(future, (location, err) -> {
+        future = connection.registry.getMetaRegionLocations()
-        if (err != null) {
+          .thenApply(locs -> Stream.of(locs.getRegionLocations())
-          returnedFuture.completeExceptionally(err);
+            .filter(loc -> loc.getRegion().getReplicaId() == regionInfo.getReplicaId())
-          return;
+            .findFirst());
-        }
+      } else {
-        if (!location.isPresent() || location.get().getRegion() == null) {
+        future =
-          returnedFuture.completeExceptionally(
+          AsyncMetaTableAccessor.getRegionLocation(metaTable, regionNameOrEncodedRegionName);
-            new UnknownRegionException("Invalid region name or encoded region name: " +
+      }
-              Bytes.toStringBinary(regionNameOrEncodedRegionName)));
-        } else {
-          returnedFuture.complete(location.get());
-        }
-      });
-      return returnedFuture;
-    } catch (IOException e) {
-      return failedFuture(e);
     }
+
+    CompletableFuture<HRegionLocation> returnedFuture = new CompletableFuture<>();
+    addListener(future, (location, err) -> {
+      if (err != null) {
+        returnedFuture.completeExceptionally(err);
+        return;
+      }
+      if (!location.isPresent() || location.get().getRegion() == null) {
+        returnedFuture.completeExceptionally(
+          new UnknownRegionException("Invalid region name or encoded region name: " +
+            Bytes.toStringBinary(regionNameOrEncodedRegionName)));
+      } else {
+        returnedFuture.complete(location.get());
+      }
+    });
+    return returnedFuture;
   }
 
   /**

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

@@ -362,9 +362,25 @@ public interface RegionInfo extends Comparable<RegionInfo> {
    * @return True if <code>regionName</code> represents an encoded name.
    */
   @InterfaceAudience.Private // For use by internals only.
-  public static boolean isEncodedRegionName(byte[] regionName) {
+  static boolean isEncodedRegionName(byte[] regionName) {
     // If not parseable as region name, presume encoded. TODO: add stringency; e.g. if hex.
-    return parseRegionNameOrReturnNull(regionName) == null && regionName.length <= MD5_HEX_LENGTH;
+    if (parseRegionNameOrReturnNull(regionName) == null) {
+      if (regionName.length > MD5_HEX_LENGTH) {
+        return false;
+      } else if (regionName.length == MD5_HEX_LENGTH) {
+        return true;
+      } else {
+        String encodedName = Bytes.toString(regionName);
+        try {
+          Integer.parseInt(encodedName);
+          // If this is a valid integer, it could be hbase:meta's encoded region name.
+          return true;
+        } catch(NumberFormatException er) {
+          return false;
+        }
+      }
+    }
+    return false;
   }
 
   /**

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin1.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.hbase.client;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
@@ -130,6 +131,24 @@ public class TestAdmin1 extends TestAdminBase {
     assertTrue(exception instanceof TableNotFoundException);
   }
 
+  @Test
+  public void testCompactATableWithSuperLongTableName() throws Exception {
+    TableName tableName = TableName.valueOf(name.getMethodName());
+    TableDescriptor htd = TableDescriptorBuilder.newBuilder(tableName)
+      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("fam1")).build();
+    try {
+      ADMIN.createTable(htd);
+      assertThrows(IllegalArgumentException.class,
+        () -> ADMIN.majorCompactRegion(tableName.getName()));
+
+      assertThrows(IllegalArgumentException.class,
+        () -> ADMIN.majorCompactRegion(Bytes.toBytes("abcd")));
+    } finally {
+      ADMIN.disableTable(tableName);
+      ADMIN.deleteTable(tableName);
+    }
+  }
+
   @Test
   public void testCompactionTimestamps() throws Exception {
     TableName tableName = TableName.valueOf(name.getMethodName());

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java

@@ -19,6 +19,7 @@ package org.apache.hadoop.hbase.client;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
@@ -316,11 +317,9 @@ public class TestAdmin2 extends TestAdminBase {
       if (!regionInfo.isMetaRegion()) {
         if (regionInfo.getRegionNameAsString().contains(name)) {
           info = regionInfo;
-          try {
+          assertThrows(UnknownRegionException.class,
-            ADMIN.unassign(Bytes.toBytes("sample"), true);
+            () -> ADMIN.unassign(Bytes.toBytes(
-          } catch (UnknownRegionException nsre) {
+              "test,,1358563771069.acc1ad1b7962564fc3a43e5907e8db33."), true));
-            // expected, ignore it
-          }
         }
       }
     }