[NO ISSUE][REP] Account for SSL socket data transfer behavior

- user model changes: no
- storage format changes: no
- interface changes: no

Details:

- Account for the fact that a call to an SSLSocketChannel
  read operation can return 0 read bytes even in a blocking
  socket due to incomplete SSL packet.

Change-Id: I0e1e69cba7336e0cfca5def870ab16334ce8c19f
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/11064
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
Reviewed-by: Ali Alsuliman <ali.al.solaiman@gmail.com>

asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/management/NetworkingUtil.java

@@ -60,30 +60,32 @@ public static void readBytes(ISocketChannel socketChannel, ByteBuffer byteBuffer
 
     public static void sendFile(FileChannel fileChannel, ISocketChannel socketChannel) throws IOException {
         long pos = 0;
-        long fileSize = fileChannel.size();
-        long remainingBytes = fileSize;
-        long transferredBytes = 0;
-
-        while ((transferredBytes += fileChannel.transferTo(pos, remainingBytes, socketChannel)) < fileSize) {
-            pos += transferredBytes;
-            remainingBytes -= transferredBytes;
+        long remainingBytes = fileChannel.size();
+        try {
+            while (remainingBytes > 0) {
+                long sentBytes = fileChannel.transferTo(pos, remainingBytes, socketChannel);
+                pos += sentBytes;
+                remainingBytes -= sentBytes;
+            }
+            socketChannel.getSocketChannel().socket().getOutputStream().flush();
+        } catch (Exception e) {
+            LOGGER.info("failed to send file; file size {}, pos {}, remainingBytes {}", fileChannel.size(), pos,
+                    remainingBytes);
         }
-        socketChannel.getSocketChannel().socket().getOutputStream().flush();
     }
 
     public static void downloadFile(FileChannel fileChannel, ISocketChannel socketChannel) throws IOException {
+        long remainingBytes = fileChannel.size();
         long pos = 0;
-        long fileSize = fileChannel.size();
-        long count = fileSize;
-        long numTransferred = 0;
         try {
-            while ((numTransferred += fileChannel.transferFrom(socketChannel, pos, count)) < fileSize) {
-                pos += numTransferred;
-                count -= numTransferred;
+            while (remainingBytes > 0) {
+                long readBytes = fileChannel.transferFrom(socketChannel, pos, remainingBytes);
+                pos += readBytes;
+                remainingBytes -= readBytes;
             }
         } catch (Exception e) {
-            LOGGER.info("failed to download file; file size {}, pos {}, count {}, numTransferred {}", fileSize, pos,
-                    count, numTransferred);
+            LOGGER.info("failed to download file; file size {}, pos {}, remainingBytes {}", fileChannel.size(), pos,
+                    remainingBytes);
             throw e;
         }
     }