The repl_monitor_refresh.js test removes a node from a shard and later tries to stop the replset. However, in the process of shutting down, it calls hello on the nodes to : this hello can fail because the removed nodes shuts down its connections. One possible solution is to skip all validation which should skip the hello and simply kill the process through a signal. For this specific test skipping data validation is acceptable because it tests the RSM and doesn't do any data operations.