Github user sueann commented on the issue:
https://github.com/apache/spark/pull/16480
Unit test runs & logs:
* TrainValidationSplit
```
$ build/sbt "test-only
org.apache.spark.ml.tuning.TrainValidationSplitSuiteâ
$ less mllib/target/unit-tests.log
...
17/01/05 11:21:51.877
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
Instrumentation: TrainValidationSplit-tvs_8e7090288e01-206645650-7: training:
numPartitions=2 storageLevel=StorageLevel(1 replicas)
17/01/05 11:21:51.877
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
Instrumentation: TrainValidationSplit-tvs_8e7090288e01-206645650-7:
{"trainRatio":0.5}
17/01/05 11:21:51.877
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
Instrumentation: TrainValidationSplit-tvs_8e7090288e01-206645650-7:
{"estimator":"LinearRegression","evaluator":"RegressionEvaluator","numModels":4}
17/01/05 11:21:51.877
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
TrainValidationSplit: Train validation split metrics:
WrappedArray(7.79718164555543, 7.734602725775261, 7.79718164555543,
0.11150408019144314)
17/01/05 11:21:51.877
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
TrainValidationSplit: Best set of parameters:
{
linReg_8e7bf3d889f1-maxIter: 10,
linReg_8e7bf3d889f1-regParam: 0.001
}
17/01/05 11:21:51.877
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
TrainValidationSplit: Best train validation split metric: 0.11150408019144314.
...
17/01/05 11:21:52.087
pool-1-thread-1-ScalaTest-running-TrainValidationSplitSuite INFO
Instrumentation: TrainValidationSplit-tvs_8e7090288e01-206645650-7: training
finished
```
* CrossValdator
```
$ build/sbt "test-only org.apache.spark.ml.tuning.CrossValidatorSuite"
$ less mllib/target/unit-tests.log
...
17/01/05 11:27:26.860 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO Instrumentation: CrossValidator-cv_f60fd2c0f5ce-428174643-13: training:
numPartitions=2 storageLevel=StorageLevel(1 replicas)
17/01/05 11:27:26.860 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO Instrumentation: CrossValidator-cv_f60fd2c0f5ce-428174643-13:
{"numFolds":3}
17/01/05 11:27:26.860 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO Instrumentation: CrossValidator-cv_f60fd2c0f5ce-428174643-13:
{"estimator":"LogisticRegression","evaluator":"BinaryClassificationEvaluator","numModels":4}
17/01/05 11:27:26.860 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO CrossValidator: Average cross-validation metrics: WrappedArray(0.5, 0.5,
0.8333037031406596, 0.8333037031406596)
17/01/05 11:27:26.862 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO CrossValidator: Best set of parameters:
{
logreg_e763c2efb948-maxIter: 10,
logreg_e763c2efb948-regParam: 0.001
}
17/01/05 11:27:26.863 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO CrossValidator: Best cross-validation metric: 0.8333037031406596.
...
17/01/05 11:27:27.040 pool-1-thread-1-ScalaTest-running-CrossValidatorSuite
INFO Instrumentation: CrossValidator-cv_f60fd2c0f5ce-428174643-13: training
finished
...
```
* OneVsRest
```
$ build/sbt "test-only org.apache.spark.ml.classification.OneVsRestSuite"
$ less mllib/target/unit-tests.log
...
17/01/05 13:26:36.017 pool-1-thread-1-ScalaTest-running-OneVsRestSuite INFO
Instrumentation: OneVsRest-oneVsRest_551a9c8d41e4-1366242214-12: training:
numPartitions=2 storageLevel=StorageLevel(1 replicas)
17/01/05 13:26:36.018 pool-1-thread-1-ScalaTest-running-OneVsRestSuite INFO
Instrumentation: OneVsRest-oneVsRest_551a9c8d41e4-1366242214-12:
{"labelCol":"indexed","featuresCol":"f","predictionCol":"p"}
17/01/05 13:26:36.018 pool-1-thread-1-ScalaTest-running-OneVsRestSuite INFO
Instrumentation: OneVsRest-oneVsRest_551a9c8d41e4-1366242214-12:
{"numClasses":3}
17/01/05 13:26:36.018 pool-1-thread-1-ScalaTest-running-OneVsRestSuite INFO
Instrumentation: OneVsRest-oneVsRest_551a9c8d41e4-1366242214-12:
{"classifier":"LogisticRegression"}
17/01/05 13:26:36.018 pool-1-thread-1-ScalaTest-running-OneVsRestSuite INFO
Instrumentation: OneVsRest-oneVsRest_551a9c8d41e4-1366242214-12: training
finished
...
```
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