HBASE-28742 Fixes NPE for CompactionTool when mslab enabled

hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/regionserver/CompactionTool.java

@@ -211,6 +211,8 @@ public void setup(Context context) {
       } catch (IOException e) {
         throw new RuntimeException("Could not get the input FileSystem", e);
       }
+      // Disable the MemStoreLAB as MemStore is not used by flow during compaction
+      conf.setBoolean(MemStoreLAB.USEMSLAB_KEY, false);
     }
 
     @Override
@@ -369,6 +371,8 @@ private int doMapReduce(final FileSystem fs, final Set<Path> toCompactDirs,
    */
   private int doClient(final FileSystem fs, final Set<Path> toCompactDirs,
     final boolean compactOnce, final boolean major) throws IOException {
+    // Disable the MemStoreLAB as MemStore is not used by flow during compaction
+    getConf().setBoolean(MemStoreLAB.USEMSLAB_KEY, false);
     CompactionWorker worker = new CompactionWorker(fs, getConf());
     for (Path path : toCompactDirs) {
       worker.compact(path, compactOnce, major);

hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionToolNpeFix.java

@@ -0,0 +1,141 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.regionserver;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.HBaseTestingUtil;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.testclassification.RegionServerTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.CommonFSUtils;
+import org.apache.hadoop.util.ToolRunner;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+@Category({ MediumTests.class, RegionServerTests.class })
+public class TestCompactionToolNpeFix {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestCompactionToolNpeFix.class);
+
+  private static final HBaseTestingUtil TESTUTIL = new HBaseTestingUtil();
+
+  private HRegion region;
+  private final static byte[] qualifier = Bytes.toBytes("qf");
+  private static Path rootDir;
+  private final TableName tableName = TableName.valueOf(getClass().getSimpleName());
+
+  @BeforeClass
+  public static void setUpAfterClass() throws Exception {
+    TESTUTIL.getConfiguration().setBoolean(MemStoreLAB.USEMSLAB_KEY, false);
+    TESTUTIL.startMiniCluster();
+    rootDir = TESTUTIL.getDefaultRootDirPath();
+    TESTUTIL.startMiniMapReduceCluster();
+
+  }
+
+  @AfterClass
+  public static void tearDown() throws Exception {
+    TESTUTIL.shutdownMiniMapReduceCluster();
+    TESTUTIL.shutdownMiniCluster();
+    TESTUTIL.cleanupTestDir();
+
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    TESTUTIL.createTable(tableName, HBaseTestingUtil.fam1);
+    this.region = TESTUTIL.getMiniHBaseCluster().getRegions(tableName).get(0);
+  }
+
+  @After
+  public void after() throws IOException {
+    TESTUTIL.deleteTable(tableName);
+  }
+
+  private void putAndFlush(int key) throws Exception {
+    Put put = new Put(Bytes.toBytes(key));
+    put.addColumn(HBaseTestingUtil.fam1, qualifier, Bytes.toBytes("val" + key));
+    region.put(put);
+    TESTUTIL.flush(tableName);
+  }
+
+  private HStore prepareStoreWithMultiFiles() throws Exception {
+    for (int i = 0; i < 5; i++) {
+      this.putAndFlush(i);
+    }
+    HStore store = region.getStore(HBaseTestingUtil.fam1);
+    assertEquals(5, store.getStorefilesCount());
+    return store;
+  }
+
+  @Test
+  public void testCompactedFilesArchived() throws Exception {
+    HStore store = prepareStoreWithMultiFiles();
+    Path tableDir = CommonFSUtils.getTableDir(rootDir, region.getRegionInfo().getTable());
+    FileSystem fs = store.getFileSystem();
+    String storePath = tableDir + "/" + region.getRegionInfo().getEncodedName() + "/"
+      + Bytes.toString(HBaseTestingUtil.fam1);
+    FileStatus[] regionDirFiles = fs.listStatus(new Path(storePath));
+    assertEquals(5, regionDirFiles.length);
+    String defaultFS = TESTUTIL.getMiniHBaseCluster().getConfiguration().get("fs.defaultFS");
+    Configuration config = HBaseConfiguration.create();
+    config.set("fs.defaultFS", defaultFS);
+    int result = ToolRunner.run(config, new CompactionTool(),
+      new String[] { "-compactOnce", "-major", storePath });
+    assertEquals(0, result);
+    regionDirFiles = fs.listStatus(new Path(storePath));
+    assertEquals(1, regionDirFiles.length);
+  }
+
+  @Test
+  public void testCompactedFilesArchivedMapRed() throws Exception {
+    HStore store = prepareStoreWithMultiFiles();
+    Path tableDir = CommonFSUtils.getTableDir(rootDir, region.getRegionInfo().getTable());
+    FileSystem fs = store.getFileSystem();
+    String storePath = tableDir + "/" + region.getRegionInfo().getEncodedName() + "/"
+      + Bytes.toString(HBaseTestingUtil.fam1);
+    FileStatus[] regionDirFiles = fs.listStatus(new Path(storePath));
+    assertEquals(5, regionDirFiles.length);
+    String defaultFS = TESTUTIL.getMiniHBaseCluster().getConfiguration().get("fs.defaultFS");
+    Configuration config = HBaseConfiguration.create(TESTUTIL.getConfiguration());
+    config.setBoolean(MemStoreLAB.USEMSLAB_KEY, true);
+    config.set("fs.defaultFS", defaultFS);
+    int result = ToolRunner.run(config, new CompactionTool(),
+      new String[] { "-compactOnce", "-mapred", "-major", storePath });
+    assertEquals(0, result);
+    regionDirFiles = fs.listStatus(new Path(storePath));
+    assertEquals(1, regionDirFiles.length);
+  }
+}