From 4115f733435c1f6d4a10cf71d0d058d6bc7858c6 Mon Sep 17 00:00:00 2001
From: Nan Deng <dengnan@google.com>
Date: Wed, 2 Jul 2014 16:20:05 -0700
Subject: [PATCH] type check

---
 storage/influxdb/influxdb.go | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/storage/influxdb/influxdb.go b/storage/influxdb/influxdb.go
index f665fd1c..1d42ef0d 100644
--- a/storage/influxdb/influxdb.go
+++ b/storage/influxdb/influxdb.go
@@ -193,8 +193,12 @@ func (self *influxdbStorage) valuesToContainerStats(columns []string, values []i
 				stats.Timestamp, err = time.Parse(time.RFC3339Nano, str)
 			}
 		case col == colMachineName:
-			if v.(string) != self.machineName {
-				return nil, fmt.Errorf("different machine")
+			if m, ok := v.(string); ok {
+				if m != self.machineName {
+					return nil, fmt.Errorf("different machine")
+				}
+			} else {
+				return nil, fmt.Errorf("machine name field is not a string: %v", v)
 			}
 		// Cumulative Cpu Usage
 		case col == colCpuCumulativeUsage:
@@ -254,8 +258,12 @@ func (self *influxdbStorage) valuesToContainerSample(columns []string, values []
 				sample.Timestamp, err = time.Parse(time.RFC3339Nano, str)
 			}
 		case col == colMachineName:
-			if v.(string) != self.machineName {
-				return nil, fmt.Errorf("different machine")
+			if m, ok := v.(string); ok {
+				if m != self.machineName {
+					return nil, fmt.Errorf("different machine")
+				}
+			} else {
+				return nil, fmt.Errorf("machine name field is not a string: %v", v)
 			}
 		// Memory Usage
 		case col == colMemoryUsage: