tree e04b783f11928cf537fa71172d28a094d4c98f64
parent e8f6740230beeb87ae46847cbca05a19cd78912c
author Yuta HIGUCHI <y-higuchi@ak.jp.nec.com> 1520545838 -0800
committer Yuta HIGUCHI <y-higuchi@ak.jp.nec.com> 1520549050 -0800

Improve error logs.

- Include root cause exception.
- Add info what failed.

Change-Id: Id3ea1ca514cae6884a67174606b0e84ed458aec5