HBASE-13037 LoadIncrementalHFile should try to verify the content of unmatched families

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java

@@ -532,6 +532,47 @@ public class HFile {
     return pickReaderVersion(path, wrapper, size, cacheConf, null, conf);
   }
 
+  /**
+   * Returns true if the specified file has a valid HFile Trailer.
+   * @param fs filesystem
+   * @param path Path to file to verify
+   * @return true if the file has a valid HFile Trailer, otherwise false
+   * @throws IOException if failed to read from the underlying stream
+   */
+  public static boolean isHFileFormat(final FileSystem fs, final Path path) throws IOException {
+    return isHFileFormat(fs, fs.getFileStatus(path));
+  }
+
+  /**
+   * Returns true if the specified file has a valid HFile Trailer.
+   * @param fs filesystem
+   * @param fileStatus the file to verify
+   * @return true if the file has a valid HFile Trailer, otherwise false
+   * @throws IOException if failed to read from the underlying stream
+   */
+  public static boolean isHFileFormat(final FileSystem fs, final FileStatus fileStatus)
+      throws IOException {
+    final Path path = fileStatus.getPath();
+    final long size = fileStatus.getLen();
+    FSDataInputStreamWrapper fsdis = new FSDataInputStreamWrapper(fs, path);
+    try {
+      boolean isHBaseChecksum = fsdis.shouldUseHBaseChecksum();
+      assert !isHBaseChecksum; // Initially we must read with FS checksum.
+      FixedFileTrailer.readFromStream(fsdis.getStream(isHBaseChecksum), size);
+      return true;
+    } catch (IllegalArgumentException e) {
+      return false;
+    } catch (IOException e) {
+      throw e;
+    } finally {
+      try {
+        fsdis.close();
+      } catch (Throwable t) {
+        LOG.warn("Error closing fsdis FSDataInputStreamWrapper: " + path, t);
+      }
+    }
+  }
+
   /**
    * Metadata for this file. Conjured by the writer. Read in by the reader.
    */

hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.java

@@ -89,6 +89,7 @@ import java.util.Collection;
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
@@ -282,15 +283,22 @@ public class LoadIncrementalHFiles extends Configured implements Tool {
       discoverLoadQueue(queue, hfofDir);
       // check whether there is invalid family name in HFiles to be bulkloaded
       Collection<HColumnDescriptor> families = table.getTableDescriptor().getFamilies();
-      ArrayList<String> familyNames = new ArrayList<String>();
+      ArrayList<String> familyNames = new ArrayList<String>(families.size());
       for (HColumnDescriptor family : families) {
         familyNames.add(family.getNameAsString());
       }
       ArrayList<String> unmatchedFamilies = new ArrayList<String>();
-      for (LoadQueueItem lqi : queue) {
+      Iterator<LoadQueueItem> queueIter = queue.iterator();
+      while (queueIter.hasNext()) {
+        LoadQueueItem lqi = queueIter.next();
         String familyNameInHFile = Bytes.toString(lqi.family);
         if (!familyNames.contains(familyNameInHFile)) {
-          unmatchedFamilies.add(familyNameInHFile);
+          if (HFile.isHFileFormat(lqi.hfilePath.getFileSystem(getConf()), lqi.hfilePath)) {
+            unmatchedFamilies.add(familyNameInHFile);
+          } else {
+            LOG.warn("the file " + lqi + " doesn't seems to be an hfile. skipping");
+            queueIter.remove();
+          }
         }
       }
       if (unmatchedFamilies.size() > 0) {

hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestLoadIncrementalHFiles.java

@@ -27,6 +27,7 @@ import java.io.IOException;
 import java.util.TreeMap;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
@@ -306,6 +307,61 @@ public class TestLoadIncrementalHFiles {
     }
   }
 
+  /**
+   * Write a random data file in a dir with a valid family name but not part of the table families
+   * we should we able to bulkload without getting the unmatched family exception. HBASE-13037
+   */
+  @Test(timeout = 60000)
+  public void testNonHfileFolderWithUnmatchedFamilyName() throws Exception {
+    Path dir = util.getDataTestDirOnTestFS("testNonHfileFolderWithUnmatchedFamilyName");
+    FileSystem fs = util.getTestFileSystem();
+    dir = dir.makeQualified(fs);
+
+    Path familyDir = new Path(dir, Bytes.toString(FAMILY));
+    HFileTestUtil.createHFile(util.getConfiguration(), fs, new Path(familyDir, "hfile_0"),
+        FAMILY, QUALIFIER, Bytes.toBytes("begin"), Bytes.toBytes("end"), 500);
+
+    final String NON_FAMILY_FOLDER = "_logs";
+    Path nonFamilyDir = new Path(dir, NON_FAMILY_FOLDER);
+    fs.mkdirs(nonFamilyDir);
+    createRandomDataFile(fs, new Path(nonFamilyDir, "012356789"), 16 * 1024);
+
+    Table table = null;
+    try {
+      final String TABLE_NAME = "mytable_testNonHfileFolderWithUnmatchedFamilyName";
+      table = util.createTable(TableName.valueOf(TABLE_NAME), FAMILY);
+
+      final String[] args = {dir.toString(), TABLE_NAME};
+      new LoadIncrementalHFiles(util.getConfiguration()).run(args);
+      assertEquals(500, util.countRows(table));
+    } finally {
+      if (table != null) {
+        table.close();
+      }
+      fs.delete(dir, true);
+    }
+  }
+
+  private static void createRandomDataFile(FileSystem fs, Path path, int size)
+      throws IOException {
+    FSDataOutputStream stream = fs.create(path);
+    try {
+      byte[] data = new byte[1024];
+      for (int i = 0; i < data.length; ++i) {
+        data[i] = (byte)(i & 0xff);
+      }
+      while (size >= data.length) {
+        stream.write(data, 0, data.length);
+        size -= data.length;
+      }
+      if (size > 0) {
+        stream.write(data, 0, size);
+      }
+    } finally {
+      stream.close();
+    }
+  }
+
   @Test(timeout = 60000)
   public void testSplitStoreFile() throws IOException {
     Path dir = util.getDataTestDirOnTestFS("testSplitHFile");