HADOOP-14431. ModifyTime of FileStatus returned by SFTPFileSystem's getFileStatus method is wrong. Contributed by Hongyuan Li.

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

@@ -277,7 +277,7 @@ public class SFTPFileSystem extends FileSystem {
     // Using default block size since there is no way in SFTP channel to know of
     // block sizes on server. The assumption could be less than ideal.
     long blockSize = DEFAULT_BLOCK_SIZE;
-    long modTime = attr.getMTime() * 1000; // convert to milliseconds
+    long modTime = attr.getMTime() * 1000L; // convert to milliseconds
     long accessTime = attr.getATime() * 1000L;
     FsPermission permission = getPermissions(sftpFile);
     // not be able to get the real user group name, just use the user and group

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/sftp/TestSFTPFileSystem.java

@@ -319,4 +319,13 @@ public class TestSFTPFileSystem {
     assertEquals(accessTime1, accessTime2);
   }
 
+  @Test
+  public void testGetModifyTime() throws IOException {
+    Path file = touch(localFs, name.getMethodName().toLowerCase() + "1");
+    java.io.File localFile = ((LocalFileSystem) localFs).pathToFile(file);
+    long modifyTime1 = localFile.lastModified();
+    long modifyTime2 = sftpFs.getFileStatus(file).getModificationTime();
+    assertEquals(modifyTime1, modifyTime2);
+  }
+
 }