I am using javax.websockets to have a webSocket connection with Blockchain.info, except that it closes down after random intervals, and I can see the close reason as:

'Unexpected end of stream', Error Code = 1006.

I am not able to figure out why this occurs. Here is the code:

private void initializeWebSocketSession(Session session)
{
    WebSocketContainer container container = ContainerProvider.getWebSocketContainer();
    Session session = container.connectToServer(BlockchainWebSocketClient.class, URI.create("wss://ws.blockchain.info/inv"));               
}

public void onOpen(Session session) throws IOException
{
    session.setMaxIdleTimeout(0);
    session.getBasicRemote().sendText("{\"op\":\"unconfirmed_sub\"}");
}

@OnMessage
public void onMessage(String message, boolean isLastPartOfMessage)
{
    // Some logic
}