fix: fix generic 404 errors

ronantakizawa · ronantakizawa · commit c2ca7d7449fe · 2025-08-12T11:00:48.000-06:00
diff --git a/mcp-spring/mcp-spring-webflux/src/main/java/io/modelcontextprotocol/client/transport/WebClientStreamableHttpTransport.java b/mcp-spring/mcp-spring-webflux/src/main/java/io/modelcontextprotocol/client/transport/WebClientStreamableHttpTransport.java
@@ -326,8 +326,10 @@ else if (mediaType.isCompatibleWith(MediaType.APPLICATION_JSON)) {
 						}
 					}
 					else {
-						if (isNotFound(response) && !sessionRepresentation.equals(MISSING_SESSION_ID)) {
-							return mcpSessionNotFoundError(sessionRepresentation);
+						if (isNotFound(response)) {
+							if (transportSession.sessionId().isPresent()) {
+								return mcpSessionNotFoundError(sessionRepresentation);
+							}
 						}
 						return this.extractError(response, sessionRepresentation);
 					}

Original file line number	Diff line number	Diff line change
`@@ -326,8 +326,10 @@ else if (mediaType.isCompatibleWith(MediaType.APPLICATION_JSON)) {`
`326`	`326`	`}`
`327`	`327`	`}`
`328`	`328`	`else {`
`329`		`- if (isNotFound(response) && !sessionRepresentation.equals(MISSING_SESSION_ID)) {`
`330`		`- return mcpSessionNotFoundError(sessionRepresentation);`
	`329`	`+ if (isNotFound(response)) {`
	`330`	`+ if (transportSession.sessionId().isPresent()) {`
	`331`	`+ return mcpSessionNotFoundError(sessionRepresentation);`
	`332`	`+ }`
`331`	`333`	`}`
`332`	`334`	`return this.extractError(response, sessionRepresentation);`
`333`	`335`	`}`