src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/PlainHttpConnection.java

*** 229,253 ****
      public void enableCallback() {
          // not used
          assert false;
      }
  
!     void asyncOutput(ByteBufferReference[] refs, AsyncWriteQueue delayCallback) {
          try {
              ByteBuffer[] bufs = ByteBufferReference.toBuffers(refs);
              while (Utils.remaining(bufs) > 0) {
                  long n = chan.write(bufs);
                  if (n == 0) {
                      delayCallback.setDelayed(refs);
                      client.registerEvent(new WriteEvent());
!                     return;
                  }
              }
              ByteBufferReference.clear(refs);
          } catch (IOException e) {
              shutdown();
          }
      }
  
      @Override
      public String toString() {
          return "PlainHttpConnection: " + super.toString();
--- 229,254 ----
      public void enableCallback() {
          // not used
          assert false;
      }
  
!     boolean asyncOutput(ByteBufferReference[] refs, AsyncWriteQueue delayCallback) {
          try {
              ByteBuffer[] bufs = ByteBufferReference.toBuffers(refs);
              while (Utils.remaining(bufs) > 0) {
                  long n = chan.write(bufs);
                  if (n == 0) {
                      delayCallback.setDelayed(refs);
                      client.registerEvent(new WriteEvent());
!                     return false;
                  }
              }
              ByteBufferReference.clear(refs);
          } catch (IOException e) {
              shutdown();
          }
+         return true;
      }
  
      @Override
      public String toString() {
          return "PlainHttpConnection: " + super.toString();