[jira] [Created] (SPARK-17356) Out of memory when calling TreeNode.toJSON

["Sean Zhong (JIRA)" <ji...@apache.org>]

Sean Zhong created SPARK-17356:
----------------------------------

             Summary: Out of memory when calling TreeNode.toJSON
                 Key: SPARK-17356
                 URL: https://issues.apache.org/jira/browse/SPARK-17356
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Sean Zhong


When using MLLib, TreeNode.toJSON may cause out of memory exception with stack trace like this
{code}
java.lang.OutOfMemoryError: GC overhead limit exceeded
	at scala.collection.mutable.AbstractSeq.<init>(Seq.scala:47)
	at scala.collection.mutable.AbstractBuffer.<init>(Buffer.scala:48)
	at scala.collection.mutable.ListBuffer.<init>(ListBuffer.scala:46)
	at scala.collection.immutable.List$.newBuilder(List.scala:396)
	at scala.collection.generic.GenericTraversableTemplate$class.newBuilder(GenericTraversableTemplate.scala:64)
	at scala.collection.AbstractTraversable.newBuilder(Traversable.scala:105)
	at scala.collection.TraversableLike$class.filter(TraversableLike.scala:262)
	at scala.collection.AbstractTraversable.filter(Traversable.scala:105)
	at scala.collection.TraversableLike$class.filterNot(TraversableLike.scala:274)
	at scala.collection.AbstractTraversable.filterNot(Traversable.scala:105)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:25)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:20)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:25)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:25)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:25)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:25)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:20)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:20)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:25)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:20)
	at org.json4s.jackson.JValueSerializer.serialize(JValueSerializer.scala:7)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:128)
	at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:2881)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:2338)
	at org.json4s.jackson.JsonMethods$class.compact(JsonMethods.scala:34)
	at org.json4s.jackson.JsonMethods$.compact(JsonMethods.scala:50)
	at org.apache.spark.sql.catalyst.trees.TreeNode.toJSON(TreeNode.scala:566){code}





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