HADOOP-16150. Added concat method to ChecksumFS as unsupported operation.

              Contributed by Steve Loughran

(cherry picked from commit 8b517e7ad670aa8ee0b73ce5a572f36ce63eabee)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ChecksumFileSystem.java

@@ -372,6 +372,12 @@ public abstract class ChecksumFileSystem extends FilterFileSystem {
         + "by ChecksumFileSystem");
   }
 
+  @Override
+  public void concat(final Path f, final Path[] psrcs) throws IOException {
+    throw new UnsupportedOperationException("Concat is not supported "
+        + "by ChecksumFileSystem");
+  }
+
   /**
    * Calculated the length of the checksum file in bytes.
    * @param size the length of the data file in bytes

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/localfs/TestLocalFSContractMultipartUploader.java

@@ -17,6 +17,8 @@
  */
 package org.apache.hadoop.fs.contract.localfs;
 
+import org.junit.Assume;
+
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.contract.AbstractContractMultipartUploaderTest;
 import org.apache.hadoop.fs.contract.AbstractFSContract;
@@ -27,6 +29,12 @@ import org.apache.hadoop.fs.contract.AbstractFSContract;
 public class TestLocalFSContractMultipartUploader
     extends AbstractContractMultipartUploaderTest {
 
+  @Override
+  public void setup() throws Exception {
+    Assume.assumeTrue("Skipping until HDFS-13934", false);
+    super.setup();
+  }
+
   @Override
   protected AbstractFSContract createContract(Configuration conf) {
     return new LocalFSContract(conf);