Sandy Ryza created SPARK-2089: --------------------------------- Summary: With YARN, preferredNodeLocalityData isn't honored Key: SPARK-2089 URL: https://issues.apache.org/jira/browse/SPARK-2089 Project: Spark Issue Type: Bug Components: YARN Affects Versions: 1.0.0 Reporter: Sandy Ryza
When running in YARN cluster mode, apps can pass preferred locality data when constructing a Spark context that will dictate where to request executor containers. This is currently broken because of a race condition. The Spark-YARN code runs the user class and waits for it to start up a SparkContext. During its initialization, the SparkContext will create a YarnClusterScheduler, which notifies a monitor in the Spark-YARN code that . The Spark-Yarn code then immediately fetches the preferredNodeLocationData from the SparkContext and uses it to start requesting containers. But in the SparkContext constructor that takes the preferredNodeLocationData, setting preferredNodeLocationData comes after the rest of the initialization, so, if the Spark-YARN code comes around quickly enough after being notified, the data that's fetched is the empty unset version. The occurred during all of my runs. -- This message was sent by Atlassian JIRA (v6.2#6252)