tree 01f00a235f3d7bd18505e52da7218ee4c94a4aa2
parent e277ebe5b180d3654f68dbb7d6aab52b89ecf9f7
author Jian Li <pyguni@gmail.com> 1460061459 -0700
committer Gerrit Code Review <gerrit@onlab.us> 1460082143 +0000

Resolve some NPEs during collecting system metrics

Change-Id: Id018026676948d732f342d634dff6fba630c1414