Weichen Xu created SPARK-21801:
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Summary: SparkR unit test randomly fail on trees
Key: SPARK-21801
URL: https://issues.apache.org/jira/browse/SPARK-21801
Project: Spark
Issue Type: Bug
Components: SparkR, Tests
Affects Versions: 2.2.0
Reporter: Weichen Xu
Priority: Critical
SparkR unit test sometimes will randomly occur such error:
```
1. Error: spark.randomForest (@test_mllib_tree.R#236) --------------------------
java.lang.IllegalArgumentException: requirement failed: The input column
stridx_87ea3065aeb2 should have at least two distinct values.
```
or
```
1. Error: spark.decisionTree (@test_mllib_tree.R#353) --------------------------
java.lang.IllegalArgumentException: requirement failed: The input column
stridx_d6a0b492cfa1 should have at least two distinct values.
```
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