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Title: fix(client): Fixes a bug in McpClientSession.sendRequest() by logan-querypie · Pull Request #324 · modelcontextprotocol/java-sdk · GitHub

Open Graph Title: fix(client): Fixes a bug in McpClientSession.sendRequest() by logan-querypie · Pull Request #324 · modelcontextprotocol/java-sdk

X Title: fix(client): Fixes a bug in McpClientSession.sendRequest() by logan-querypie · Pull Request #324 · modelcontextprotocol/java-sdk

Description: Motivation and Context Fixes a bug in McpClientSession.sendRequest() where it waited until timeout when receiving error responses such as 4xx or 5xx. Returning failedFuture() when an error is detected in HttpClientSseClientTransport.sendMessage() resolves the issue. How Has This Been Tested? Our project’s server uses this SDK to relay MCP communication, and we’ve confirmed that it works well in that environment. Breaking Changes Types of changes Bug fix (non-breaking change which fixes an issue) New feature (non-breaking change which adds functionality) Breaking change (fix or feature that would cause existing functionality to change) Documentation update Checklist I have read the MCP Documentation My code follows the repository's style guidelines New and existing tests pass locally I have added appropriate error handling I have added or updated documentation as needed Additional context

Open Graph Description: Motivation and Context Fixes a bug in McpClientSession.sendRequest() where it waited until timeout when receiving error responses such as 4xx or 5xx. Returning failedFuture() when an error is dete...

X Description: Motivation and Context Fixes a bug in McpClientSession.sendRequest() where it waited until timeout when receiving error responses such as 4xx or 5xx. Returning failedFuture() when an error is dete...

Opengraph URL: https://github.com/modelcontextprotocol/java-sdk/pull/324

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759a4c1 fix(client): Fixes a bug in McpClientSession.sendRequest() where it w… logan-querypie Jun 18, 2025 https://github.com/modelcontextprotocol/java-sdk/pull/324/commits/759a4c18811a140d8680eb532d9114278e1b7c1d
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