The session is not release when client.connect() occur exception (e.getMessage() is null)

[zhengshubin]

Describe the bug
A clear and concise description of behavior being reported and, if applicable, why it's incorrect.
I had create OpcUaClient
OpcUaClient client=OpcUaClient.create(...);

CompletableFuture completableFuture =client.connect();
And I had catch like it:
CompletableFuture customFuture=new CompletableFuture<>();
completableFuture.whenComplete(
(uaClient,e)->{
if (e==null) {
customFuture.complete(new CustomOpcUaClient( client));
}else {

						future.completeExceptionally(e);
					}
				}
		);

Actually, e is not null, I try print e.getMessage() but is null , And I must connect again by scheduler, it was same result.
But after many times , it occur UaServiceFaultException: status=Bad_TooManySessions.
So I think that he session is not released. even though exception occurred(e.getMessage() is null)

Expected behavior
A clear and concise description of what you expected to happen instead.

Logs and Packet Captures
If applicable, add application logs or Wireshark captures to help explain your problem.

Additional context
Version of Eclipse Milo you are using, OPC UA client or software server you are interacting with, etc...

[kevinherron]

You don’t need to keep calling connect(), if you call it once it will keep retrying.

Please fix your code example and provide code that reproduces the issue and a Wireshark capture if you continue to have a problem.