[
https://issues.apache.org/jira/browse/SPARK-23515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16376306#comment-16376306
]
Apache Spark commented on SPARK-23515:
--------------------------------------
User 'brkyvz' has created a pull request for this issue:
https://github.com/apache/spark/pull/20673
> JsonProtocol.sparkEventToJson can OOM when jsonifying an event
> --------------------------------------------------------------
>
> Key: SPARK-23515
> URL: https://issues.apache.org/jira/browse/SPARK-23515
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.2.1
> Reporter: Burak Yavuz
> Assignee: Burak Yavuz
> Priority: Major
>
> {code}
> def sparkEventToJson(event: SparkListenerEvent)
> {code}
> has a fallback method which creates a JSON object by turning an unrecognized
> event to Json and then parsing it again. This method materializes the whole
> string to parse the json record, which is unnecessary and can cause OOMs as
> seen in the stacktrace below:
> {code:java}
> java.lang.OutOfMemoryError: Java heap space
> at java.util.Arrays.copyOfRange(Arrays.java:3664)
> at java.lang.String.<init>(String.java:207)
> at java.lang.StringBuilder.toString(StringBuilder.java:407)
> at
> com.fasterxml.jackson.core.util.TextBuffer.contentsAsString(TextBuffer.java:356)
> at
> com.fasterxml.jackson.core.json.ReaderBasedJsonParser.getText(ReaderBasedJsonParser.java:235)
> at
> org.json4s.jackson.JValueDeserializer.deserialize(JValueDeserializer.scala:20)
> at
> org.json4s.jackson.JValueDeserializer.deserialize(JValueDeserializer.scala:42)
> at
> org.json4s.jackson.JValueDeserializer.deserialize(JValueDeserializer.scala:35)
> at
> com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3736)
> at
> com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2726)
> at org.json4s.jackson.JsonMethods$class.parse(JsonMethods.scala:20)
> at org.json4s.jackson.JsonMethods$.parse(JsonMethods.scala:50)
> at
> org.apache.spark.util.JsonProtocol$.sparkEventToJson(JsonProtocol.scala:103){code}
>
> We should just use the stream parsing to avoid such OOMs.
>
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
