Debug

Author: koic

conformance/expected_failures.yml

@@ -5,5 +5,3 @@ server:
   - tools-call-elicitation
   - elicitation-sep1034-defaults
   - elicitation-sep1330-enums
-  # Fails on CI (Ubuntu, Ruby 4.0) but passes locally. Root cause under investigation.
-  - tools-call-with-logging

conformance/server.rb

@@ -159,11 +159,15 @@ class << self
         attr_accessor :server_ref
 
         def call(**_args)
+          $stderr.puts "[DIAG] notify_log_message #1, transport=#{server_ref&.transport.class}"
           server_ref&.notify_log_message(data: "Tool execution started", level: "info", logger: "test_logger")
+          $stderr.puts "[DIAG] notify_log_message #1 done"
           sleep(0.05)
           server_ref&.notify_log_message(data: "Tool processing data", level: "info", logger: "test_logger")
+          $stderr.puts "[DIAG] notify_log_message #2 done"
           sleep(0.05)
           server_ref&.notify_log_message(data: "Tool execution completed", level: "info", logger: "test_logger")
+          $stderr.puts "[DIAG] notify_log_message #3 done, logging_notification=#{server_ref&.logging_message_notification.inspect}"
           MCP::Tool::Response.new([{ type: "text", text: "Logging complete (3 messages sent)" }])
         end
       end

lib/mcp/server.rb

@@ -169,14 +169,18 @@ def notify_resources_list_changed
     end
 
     def notify_log_message(data:, level:, logger: nil)
+      $stderr.puts "[DIAG] notify_log_message: transport=#{@transport.class}, notification=#{logging_message_notification.inspect}, should_notify=#{logging_message_notification&.should_notify?(level)}"
       return unless @transport
       return unless logging_message_notification&.should_notify?(level)
 
       params = { "data" => data, "level" => level }
       params["logger"] = logger if logger
 
-      @transport.send_notification(Methods::NOTIFICATIONS_MESSAGE, params)
+      result = @transport.send_notification(Methods::NOTIFICATIONS_MESSAGE, params)
+      $stderr.puts "[DIAG] send_notification result=#{result.inspect}"
+      result
     rescue => e
+      $stderr.puts "[DIAG] notify_log_message ERROR: #{e.class}: #{e.message}"
       report_exception(e, { notification: "log_message" })
     end