From 2b7bdfee378481164915b1ae4d3dd71ac091fb1e Mon Sep 17 00:00:00 2001
From: Armon Dadgar <armon.dadgar@gmail.com>
Date: Mon, 22 Feb 2016 12:15:40 -0800
Subject: [PATCH] nomad: add a sanity check guard

---
 scheduler/generic_sched.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scheduler/generic_sched.go b/scheduler/generic_sched.go
index e6df9a526..3a3db34d8 100644
--- a/scheduler/generic_sched.go
+++ b/scheduler/generic_sched.go
@@ -216,6 +216,9 @@ func (s *GenericScheduler) process() (bool, error) {
 	if !fullCommit {
 		s.logger.Printf("[DEBUG] sched: %#v: attempted %d placements, %d placed",
 			s.eval, expected, actual)
+		if newState == nil {
+			return false, fmt.Errorf("missing state refresh after partial commit")
+		}
 		return false, nil
 	}