Github user shakir774 commented on the pull request:
https://github.com/apache/flink/pull/823#issuecomment-111136272
Given following error while executing the test suite by Travis CI.
Even `import org.apache.flink.ml.common._` is imported, what may cause this
error.
```
[INFO] ^
[ERROR]
/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/clustering/GMM.scala:95:
error: not found: type Learner
[INFO] class GMM extends Learner[Point,GMModel] {
[INFO] ^
[ERROR]
/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/clustering/GMM.scala:105:
error: not found: value parameters
[INFO] parameters.add(NumIterations, numIterations)
[INFO] ^
[ERROR]
/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/clustering/GMM.scala:115:
error: not found: value parameters
[INFO] parameters.add(NumGaussians, numGaussians)
[INFO] ^
[ERROR]
/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/clustering/GMM.scala:125:
error: not found: value parameters
[INFO] parameters.add(InitialGaussians,initialGaussians)
[INFO] ^
[ERROR]
/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/clustering/GMM.scala:258:
error: not found: type Transformer
[INFO] case class GMModel(gmm: DataSet[Gaussian]) extends
Transformer[Point, Prediction]
[INFO] ^
[ERROR]
/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/clustering/GMM.scala:137:
error: value parameters is not a member of org.apache.flink.ml.clustering.GMM
[INFO] val resultingParameters = this.parameters ++ fitParameters
```
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