Java MCP SDK: Missing JSON-RPC Version

StatusFailed

Transportstdio

TestedOct 2, 2026

Duration4.7 s

Observations

Recorded behavior from this compatibility test.

The transport logged a parse error, but the call and following ping timed out after inbound processing stopped in all three runs.

Supporting records captured for this run.

error

Source: https://github.com/anilloutombam/mcp-failure-lab/blob/main/docs/compatibility/java-sdk-2.0.1.md

View raw evidence

The transport logged a parse error, but the call and following ping timed out after inbound processing stopped in all three runs.

Reviewed conclusions and upstream reporting state.

recovery

Issue opened by MCP Failure Lab