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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