NullPointerException in McpClientSession
还没有人认领这个 Issue。
评估
调研方向
从 mcp-core/src/main/java/io/modelcontextprotocol/spec/McpClientSession.java 第 280 行开始，检查与报告的 FluxHandle NPE 相关的 sendRequest 流程。以 enola-dev/enola#1862 中描述的故障和 0.14.1 环境作为上下文；完成的标准是该故障不再产生信息不足的 NPE，而是报告清晰的错误。
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描述
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Bug description
In https://github.com/enola-dev/enola/issues/1862, I've run into:
java.lang.NullPointerException: data
at java.base/java.util.Objects.requireNonNull(Objects.java:259)
at reactor.core.publisher.FluxHandle$HandleSubscriber.next(FluxHandle.java:251)
at io.modelcontextprotocol.spec.McpClientSession.lambda$sendRequest$12(McpClientSession.java:280)
at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:113)
at reactor.core.publisher.SerializedSubscriber.onNext(SerializedSubscriber.java:99)
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.onNext(FluxTimeout.java:181)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.success(MonoCreate.java:176)
I guess that this means that this is null?
Environment
0.14.1
Steps to reproduce
Unfortunately I'm unable to reproduce it locally even myself, but I am consistently seeing this on a failing CI build.
Expected behavior
Clear error message instead of NPE.
Minimal Complete Reproducible example
N/A
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