HBASE-22774 [WAL] RegionGroupingStrategy loses its function after split

Signed-off-by: Peter Somogyi <psomogyi@apache.org>

Author: Reidddddd

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java

@@ -7180,9 +7180,11 @@ HRegion createDaughterRegionFromSplits(final HRegionInfo hri) throws IOException
     // Move the files from the temporary .splits to the final /table/region directory
     fs.commitDaughterRegion(hri);
 
+    // rsServices can be null in UT
+    WAL daughterWAL = rsServices == null ? getWAL() :rsServices.getWAL(hri);
     // Create the daughter HRegion instance
-    HRegion r = HRegion.newHRegion(this.fs.getTableDir(), this.getWAL(), fs.getFileSystem(),
-        this.getBaseConf(), hri, this.getTableDesc(), rsServices);
+    HRegion r = HRegion.newHRegion(this.fs.getTableDir(), daughterWAL,
+      fs.getFileSystem(), this.getBaseConf(), hri, this.getTableDesc(), rsServices);
     r.readRequestsCount.set(this.getReadRequestsCount() / 2);
     r.writeRequestsCount.set(this.getWriteRequestsCount() / 2);
     return r;

hbase-server/src/main/java/org/apache/hadoop/hbase/wal/BoundedGroupingStrategy.java

@@ -72,7 +72,7 @@ public void init(Configuration config, String providerId) {
     int regionGroupNumber = config.getInt(NUM_REGION_GROUPS, DEFAULT_NUM_REGION_GROUPS);
     groupNames = new String[regionGroupNumber];
     for (int i = 0; i < regionGroupNumber; i++) {
-      groupNames[i] = providerId + GROUP_NAME_DELIMITER + "regiongroup-" + i;
+      groupNames[i] = "regiongroup-" + i;
     }
   }
 

hbase-server/src/main/java/org/apache/hadoop/hbase/wal/NamespaceGroupingStrategy.java

@@ -31,7 +31,6 @@
  */
 @InterfaceAudience.Private
 public class NamespaceGroupingStrategy implements RegionGroupingStrategy {
-  private String providerId;
 
   @Override
   public String group(byte[] identifier, byte[] namespace) {
@@ -41,12 +40,10 @@ public String group(byte[] identifier, byte[] namespace) {
     } else {
       namespaceString = Bytes.toString(namespace);
     }
-    return providerId + GROUP_NAME_DELIMITER + namespaceString;
+    return namespaceString;
   }
 
   @Override
-  public void init(Configuration config, String providerId) {
-    this.providerId = providerId;
-  }
+  public void init(Configuration config, String providerId) {}
 
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/wal/RegionGroupingProvider.java

@@ -62,7 +62,6 @@ public class RegionGroupingProvider implements WALProvider {
    * Map identifiers to a group number.
    */
   public static interface RegionGroupingStrategy {
-    String GROUP_NAME_DELIMITER = ".";
 
     /**
      * Given an identifier and a namespace, pick a group.
@@ -252,7 +251,7 @@ static class IdentityGroupingStrategy implements RegionGroupingStrategy {
     public void init(Configuration config, String providerId) {}
     @Override
     public String group(final byte[] identifier, final byte[] namespace) {
-      return Bytes.toString(identifier);
+      return "identity-" + Bytes.toString(identifier);
     }
   }