The "javax.websocket.RemoteEndpoint.Async#sendBinary()" Unable To Return Before The Message Is Transmitted (Doc ID 2648370.1)

Last updated on OCTOBER 09, 2023

Applies to:

Symptoms

The following RemoteEndpoint.Async#sendBinary()'s document says as "This method returns before the message is transmitted".

https://docs.oracle.com/javaee/7/api/javax/websocket/RemoteEndpoint.Async.html#sendBinary-java.nio.ByteBuffer-

But the "javax.websocket.RemoteEndpoint.Async#sendBinary()" does NOT return before the message is transmitted. For example, the "RemoteEndpoint.Async#sendBinary()" method unable to return to the application from WLS control if the network is disconnected. So it looks like the application hangs up at calling the "RemoteEndpoint.Async#sendBinary()".

The below is a sample thread stack when a sample code which name is WebSocketSample#echo() calls "RemoteEndpoint.Async#sendBinary()" method. The sample application stacks like below when the network is disconnected:

Cause

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.