diff --git a/src/leader.c b/src/leader.c
index 9cadad329..30b1ba222 100644
--- a/src/leader.c
+++ b/src/leader.c
@@ -187,7 +187,8 @@ void leader__close(struct leader *l)
 	tracef("leader close");
 	int rc;
 	/* TODO: there shouldn't be any ongoing exec request. */
-	if (l->exec != NULL) {
+	 if (l->exec != NULL) {
+		fprintf(stderr, "[INFO FOR COLE] leader close %p\n", l->exec->stmt);
 		assert(l->inflight == NULL);
 		l->exec->status = SQLITE_ERROR;
 		exec_done(l->exec, 0);
@@ -458,6 +459,8 @@ static void exec_done(struct exec *req, int asyncness)
 	req->leader->exec = NULL;
 	if (req->cb != NULL && asyncness == 0) {
 		req->cb(req, status);
+	} else if (asyncness != 0) {
+		fprintf(stderr, "[INFO FOR COLE] skip callback for %p because asyncness is %d\n", req->stmt, asyncness);
 	}
 }
 
@@ -540,9 +543,9 @@ static void exec_apply_cb(struct raft_apply *req,
 static int exec_status(int r)
 {
 	PRE(r != 0);
-	return r == RAFT_LEADERSHIPLOST ?  SQLITE_IOERR_LEADERSHIP_LOST :
-	       r == RAFT_NOSPACE ?  SQLITE_IOERR_WRITE :
-	       r == RAFT_SHUTDOWN ?  SQLITE_ABORT :
+	return r == RAFT_LEADERSHIPLOST ? SQLITE_IOERR_LEADERSHIP_LOST :
+	       r == RAFT_NOSPACE ? SQLITE_IOERR_WRITE :
+	       r == RAFT_SHUTDOWN ? SQLITE_ABORT :
 	       SQLITE_IOERR;
 }