jubatus/jubatus — pull request #781 by kmaehashi (2014-05-14 09:17:54+00:00)
Title: Improve get_model rpc error handling

`get_model` does not handle connection errors, so it does not contain server/port actually failed, which prohibits the logging policy.

Before applying this patch:

```
I0514 17:04:40.945291 1258 linear_mixer.cpp:413] start to get model from other server
W0514 17:04:49.955059 1258 linear_mixer.cpp:425] stabilizer exception: connect failed
```

After applying this patch:

```
I0514 18:16:37.019196 5300 linear_mixer.cpp:399] start to get model from other server
W0514 18:16:46.031011 5300 linear_mixer.cpp:164] get_model failed (connect failed): 192.168.122.211:9199
W0514 18:16:46.031390 5300 linear_mixer.cpp:411] stabilizer exception: connect failed
```