HBASE-5611 Replayed edits from regions that failed to open during recovery aren't removed from the global MemStore size (Jieshan)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1331681 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -312,6 +312,7 @@ public class HRegion implements HeapSize { // , Writable{
   final long rowProcessorTimeout;
   private volatile long lastFlushTime;
   final RegionServerServices rsServices;
+  private RegionServerAccounting rsAccounting;
   private List<Pair<Long, Long>> recentFlushes = new ArrayList<Pair<Long,Long>>();
   private long blockingMemStoreSize;
   final long threadWakeFrequency;
@@ -443,9 +444,10 @@ public class HRegion implements HeapSize { // , Writable{
     this.rowProcessorTimeout = conf.getLong(
         "hbase.hregion.row.processor.timeout", DEFAULT_ROW_PROCESSOR_TIMEOUT);
 
+    if (rsServices != null) {
+      this.rsAccounting = this.rsServices.getRegionServerAccounting();
       // don't initialize coprocessors if not running within a regionserver
       // TODO: revisit if coprocessors should load in other cases
-    if (rsServices != null) {
       this.coprocessorHost = new RegionCoprocessorHost(this, rsServices, conf);
     }
     if (LOG.isDebugEnabled()) {
@@ -702,14 +704,9 @@ public class HRegion implements HeapSize { // , Writable{
    * @return the size of memstore in this region
    */
   public long addAndGetGlobalMemstoreSize(long memStoreSize) {
-    if (this.rsServices != null) {
-      RegionServerAccounting rsAccounting =
-        this.rsServices.getRegionServerAccounting();
-
-      if (rsAccounting != null) {
+    if (this.rsAccounting != null) {
       rsAccounting.addAndGetGlobalMemstoreSize(memStoreSize);
     }
-    }
     return this.memstoreSize.getAndAdd(memStoreSize);
   }
 
@@ -2708,6 +2705,11 @@ public class HRegion implements HeapSize { // , Writable{
           throw e;
         }
       }
+      // The edits size added into rsAccounting during this replaying will not
+      // be required any more. So just clear it.
+      if (this.rsAccounting != null) {
+        this.rsAccounting.clearRegionReplayEditsSize(this.regionInfo.getRegionName());
+      }
     }
     if (seqid > minSeqId) {
       // Then we added some edits to memory. Flush and cleanup split edit files.
@@ -2889,7 +2891,11 @@ public class HRegion implements HeapSize { // , Writable{
    * @return True if we should flush.
    */
   protected boolean restoreEdit(final Store s, final KeyValue kv) {
-    return isFlushSize(this.addAndGetGlobalMemstoreSize(s.add(kv)));
+    long kvSize = s.add(kv);
+    if (this.rsAccounting != null) {
+      rsAccounting.addAndGetRegionReplayEditsSize(this.regionInfo.getRegionName(), kvSize);
+    }
+    return isFlushSize(this.addAndGetGlobalMemstoreSize(kvSize));
   }
 
   /*
@@ -4775,7 +4781,7 @@ public class HRegion implements HeapSize { // , Writable{
   public static final long FIXED_OVERHEAD = ClassSize.align(
       ClassSize.OBJECT +
       ClassSize.ARRAY +
-      33 * ClassSize.REFERENCE + Bytes.SIZEOF_INT +
+      34 * ClassSize.REFERENCE + Bytes.SIZEOF_INT +
       (6 * Bytes.SIZEOF_LONG) +
       Bytes.SIZEOF_BOOLEAN);
 

src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerAccounting.java

@@ -19,9 +19,12 @@
  */
 package org.apache.hadoop.hbase.regionserver;
 
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ConcurrentSkipListMap;
 import java.util.concurrent.atomic.AtomicLong;
 
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.util.Bytes;
 
 /**
  * RegionServerAccounting keeps record of some basic real time information about
@@ -32,6 +35,11 @@ public class RegionServerAccounting {
 
   private final AtomicLong atomicGlobalMemstoreSize = new AtomicLong(0);
   
+  // Store the edits size during replaying HLog. Use this to roll back the  
+  // global memstore size once a region opening failed.
+  private final ConcurrentMap<byte[], AtomicLong> replayEditsPerRegion = 
+    new ConcurrentSkipListMap<byte[], AtomicLong>(Bytes.BYTES_COMPARATOR);
+
   /**
    * @return the global Memstore size in the RegionServer
    */
@@ -48,4 +56,46 @@ public class RegionServerAccounting {
     return atomicGlobalMemstoreSize.addAndGet(memStoreSize);
   }
   
+  /***
+   * Add memStoreSize to replayEditsPerRegion.
+   * 
+   * @param regionName region name.
+   * @param memStoreSize the Memstore size will be added to replayEditsPerRegion.
+   * @return the replay edits size for the region.
+   */
+  public long addAndGetRegionReplayEditsSize(byte[] regionName, long memStoreSize) {
+    AtomicLong replayEdistsSize = replayEditsPerRegion.get(regionName);
+    if (replayEdistsSize == null) {
+      replayEdistsSize = new AtomicLong(0);
+      replayEditsPerRegion.put(regionName, replayEdistsSize);
+    }
+    return replayEdistsSize.addAndGet(memStoreSize);
+  }
+
+  /**
+   * Roll back the global MemStore size for a specified region when this region
+   * can't be opened.
+   * 
+   * @param regionName the region which could not open.
+   * @return the global Memstore size in the RegionServer
+   */
+  public long rollbackRegionReplayEditsSize(byte[] regionName) {
+    AtomicLong replayEditsSize = replayEditsPerRegion.get(regionName);
+    long editsSizeLong = 0L;
+    if (replayEditsSize != null) {
+      editsSizeLong = -replayEditsSize.get();
+      clearRegionReplayEditsSize(regionName);
+    }
+    return addAndGetGlobalMemstoreSize(editsSizeLong);
+  }
+
+  /**
+   * Clear a region from replayEditsPerRegion.
+   * 
+   * @param regionName region name.
+   */
+  public void clearRegionReplayEditsSize(byte[] regionName) {
+    replayEditsPerRegion.remove(regionName);
+  }
+  
 }

src/main/java/org/apache/hadoop/hbase/regionserver/handler/OpenRegionHandler.java

@@ -30,6 +30,7 @@ import org.apache.hadoop.hbase.HTableDescriptor;
 import org.apache.hadoop.hbase.Server;
 import org.apache.hadoop.hbase.executor.EventHandler;
 import org.apache.hadoop.hbase.regionserver.HRegion;
+import org.apache.hadoop.hbase.regionserver.RegionServerAccounting;
 import org.apache.hadoop.hbase.regionserver.RegionServerServices;
 import org.apache.hadoop.hbase.util.CancelableProgressable;
 import org.apache.hadoop.hbase.zookeeper.ZKAssign;
@@ -345,8 +346,17 @@ public class OpenRegionHandler extends EventHandler {
       // We failed open. Our caller will see the 'null' return value
       // and transition the node back to FAILED_OPEN. If that fails,
       // we rely on the Timeout Monitor in the master to reassign.
-      LOG.error("Failed open of region=" +
-        this.regionInfo.getRegionNameAsString(), t);
+      LOG.error(
+          "Failed open of region=" + this.regionInfo.getRegionNameAsString()
+              + ", starting to roll back the global memstore size.", t);
+      // Decrease the global memstore size.
+      if (this.rsServices != null) {
+        RegionServerAccounting rsAccounting =
+          this.rsServices.getRegionServerAccounting();
+        if (rsAccounting != null) {
+          rsAccounting.rollbackRegionReplayEditsSize(this.regionInfo.getRegionName());
+        }
+      }
     }
     return region;
   }