GitHub user maropu opened a pull request:
https://github.com/apache/incubator-hivemall/pull/95
[HIVEMALL-119] Fix type cast issues in XGBoostUDTF
## What changes were proposed in this pull request?
This pr fixed the type cast issue below in `XGBoostUDTF`;
```
hive> SELECT train_xgboost_classifier(1.0, array("1:0.2"));
Failed with exception java.io.IOException:java.lang.ClassCastException:
org.apache.hadoop.io.Text cannot be cast to java.lang.String
[20:51:33] dmlc-core/include/dmlc/logging.h:235: [20:51:33]
src/objective/regression_obj.cc:89: Check failed: (info.labels.size()) != (0)
label set cannot be empty
org.apache.hadoop.hive.ql.metadata.HiveException: [20:51:33]
src/objective/regression_obj.cc:89: Check failed: (info.labels.size()) != (0)
label set cannot be empty
Check failed: (info.labels.size()) != (0) label set cannot be empty
at hivemall.xgboost.XGBoostUDTF.close(XGBoostUDTF.java:313)
at
org.apache.hadoop.hive.ql.exec.UDTFOperator.closeOp(UDTFOperator.java:152)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:683)
...
```
## What type of PR is it?
Bug Fix
## What is the Jira issue?
https://issues.apache.org/jira/browse/HIVEMALL-119
## How was this patch tested?
Manually tested.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/incubator-hivemall HIVEMALL-119
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-hivemall/pull/95.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #95
----
commit d193adb3e48b35fb354faa7cc06deec190ac8d26
Author: Takeshi Yamamuro <yamam...@apache.org>
Date: 2017-07-05T08:45:24Z
Fix issues in the Hive engine
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