mds/MDBalancer: add err info when ifstream open failure

Signed-off-by: huanwen ren <ren.huanwen@zte.com.cn>

diff --git a/src/mds/MDBalancer.cc b/src/mds/MDBalancer.cc
index 784263e9cecd3a408a2588a1c9d1912a8ae7fb06..86e38f34189f0f4ad2e510d9116432e6587231de 100644 (file)
--- a/src/mds/MDBalancer.cc
+++ b/src/mds/MDBalancer.cc
@@ -162,7 +162,9 @@ mds_load_t MDBalancer::get_load(utime_t now)
   ifstream cpu("/proc/loadavg");
   if (cpu.is_open())
     cpu >> load.cpu_load_avg;
-
+  else
+    derr << "input file '/proc/loadavg' not found" << dendl;
+  
   dout(15) << "get_load " << load << dendl;
   return load;
 }