Spring AI sse client doesn't support like reconnect

when i restrart my mcp server, i found the the sse client throw some error like sse connection error. it means the connection was shutdown. so when i start my mcp server, and use the sse client to use the tools, it throws another error like Error sending message: 404

1. when i restart my mcp server, the sse client application throw error

2025-07-04T14:31:06.225+08:00 ERROR 883108 --- [ient-2-Worker-1] i.m.c.t.HttpClientSseClientTransport     : SSE connection error

java.io.IOException: chunked transfer encoding, state: READING_LENGTH
    at java.net.http/jdk.internal.net.http.common.Utils.wrapWithExtraDetail(Utils.java:351) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.Http1Response$BodyReader.onReadError(Http1Response.java:760) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.Http1AsyncReceiver.checkForErrors(Http1AsyncReceiver.java:302) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.Http1AsyncReceiver.flush(Http1AsyncReceiver.java:268) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230) ~[java.net.http:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
    at java.base/java.lang.Thread.run(Thread.java:840) ~[na:na]
Caused by: java.io.EOFException: EOF reached while reading
    at java.net.http/jdk.internal.net.http.Http1AsyncReceiver$Http1TubeSubscriber.onComplete(Http1AsyncReceiver.java:596) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$ReadSubscription.signalCompletion(SocketTube.java:640) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$InternalReadSubscription.read(SocketTube.java:845) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.SocketTube$SocketFlowTask.run(SocketTube.java:181) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:303) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:256) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$InternalReadSubscription.signalReadable(SocketTube.java:774) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.SocketTube$InternalReadPublisher$ReadEvent.signalEvent(SocketTube.java:957) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.SocketTube$SocketFlowEvent.handle(SocketTube.java:253) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.handleEvent(HttpClientImpl.java:984) ~[java.net.http:na]
    at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.lambda$run$3(HttpClientImpl.java:939) ~[java.net.http:na]
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
    at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.run(HttpClientImpl.java:939) ~[java.net.http:na]

2. after i start my mcp server, use the client to list tools

2025-07-04T14:34:08.528+08:00 ERROR 883108 --- [onPool-worker-3] i.m.c.t.HttpClientSseClientTransport     : Error sending message: 404

I saw the mcp sdk, and it doesn't support like the reconnect options, can spring ai will support like the reconnect feature?

Comment From: ilayaperumalg

Related to https://github.com/spring-projects/spring-ai/issues/3232

Comment From: huneea7

I have the same issue. SSE is deprecated, and it looks like an update supporting Streamable HTTP will be available soon. (https://github.com/spring-projects/spring-ai/issues/3145) I hope this issue gets resolved.