per-request verbose logging and debug log improvements

daemon/worker.c

@@ -1478,6 +1478,18 @@ static int qr_task_step(struct qr_task *task,
 					   &sock_type, task->pktbuf);
 		if (unlikely(++task->iter_count > KR_ITER_LIMIT ||
 			     task->timeouts >= KR_TIMEOUT_LIMIT)) {
+
+			#ifndef NOVERBOSELOG
+			struct kr_rplan *rplan = &req->rplan;
+			struct kr_query *last  = kr_rplan_last(rplan);
+			if (task->iter_count > KR_ITER_LIMIT) {
+				VERBOSE_MSG(last, "canceling query due to exceeded iteration count limit of %d\n", KR_ITER_LIMIT);
+			}
+			if (task->timeouts >= KR_TIMEOUT_LIMIT) {
+				VERBOSE_MSG(last, "canceling query due to exceeded timeout retries limit of %d\n", KR_TIMEOUT_LIMIT);
+			}
+			#endif
+
 			return qr_task_finalize(task, KR_STATE_FAIL);
 		}
 	}