Github user catmonkeylee commented on the pull request:
https://github.com/apache/spark/pull/4854#issuecomment-84084520
When I run the sample code in cluster mode, there is an error.
Traceback (most recent call last):
File "/data1/s/apps/spark-app/app/sample_rf.py", line 25, in <module>
sameModel = RandomForestModel.load(sc, _model_path)
File "/home/s/apps/spark/python/pyspark/mllib/util.py", line 254, in load
java_model = cls._load_java(sc, path)
File "/home/s/apps/spark/python/pyspark/mllib/util.py", line 250, in
_load_java
return java_obj.load(sc._jsc.sc(), path)
File
"/home/s/apps/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/java_gateway.py", line
538, in __call__
File
"/home/s/apps/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/protocol.py", line
300, in get_return_value
py4j.protocol.Py4JJavaError: An error occurred while calling
z:org.apache.spark.mllib.tree.model.RandomForestModel.load.
: java.lang.UnsupportedOperationException: empty collection
at org.apache.spark.rdd.RDD.first(RDD.scala:1191)
at
org.apache.spark.mllib.util.Loader$.loadMetadata(modelSaveLoad.scala:125)
at
org.apache.spark.mllib.tree.model.RandomForestModel$.load(treeEnsembleModels.scala:65)
at
org.apache.spark.mllib.tree.model.RandomForestModel.load(treeEnsembleModels.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
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