Describe the bug

The blocking read on istream.read() can cause delays in reaching the onClose callback when a close command is issued externally.

try {
while (!isClosing() && !isClosed() && (readBytes = istream.read(rawbuffer)) != -1) {
engine.decode(ByteBuffer.wrap(rawbuffer, 0, readBytes));
}
engine.eot();
} catch (IOException e) {
handleIOException(e);
} catch (RuntimeException e) {
// this catch case covers internal errors only and indicates a bug in this websocket implementation
onError(e);
engine.closeConnection(CloseFrame.ABNORMAL_CLOSE, e.getMessage());
}

To Reproduce
Steps to reproduce the behavior:

1.connect
2.send
3.close (server delay send any data)

Example application to reproduce the issue

Expected behavior

onclose no delay

Debug log

Environment(please complete the following information):

Additional context