René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"TCP connections remain in CLOSE_WAIT state after client disconnection in SSE mode","articleBody":"**Bug description**\nWhen clients terminate SSE connections with the Java MCP server, the underlying TCP connections remain in CLOSE_WAIT state, while the client side stays in FIN_WAIT_2. This can lead to resource leaks, especially in scenarios where clients cannot properly send RST signals (e.g., when using customized user-space network stacks).\n\n\u003cimg width=\"1468\" height=\"202\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/eab041bc-bacd-4b97-b9e5-4042482c1779\" /\u003e\n\n**Environment**\njava version: 17\nsdk version: 0.10.0\nspring-ai.version: 1.0.0\n\n**Steps to reproduce**\n1. setup a plain spring-ai mcp server, listen on localhost:8888/sse\n2. use inspector to call 127.0.0.1:8888/sse\n3. use inspector to list tool/call tools/...\n4. disconnect the connection and use netstat -anp|grep 8888\n\n**Expected behavior**\nAll TCP connections should be closed properly.\n\n\n","author":{"url":"https://github.com/hty690","@type":"Person","name":"hty690"},"datePublished":"2025-07-07T07:34:38.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/378/java-sdk/issues/378"}