Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/8533#discussion_r48953313
--- Diff: core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
---
@@ -35,16 +37,28 @@ case class ExecutorCacheTaskLocation(override val host:
String, executorId: Stri
/**
* A location on a host.
+ * The host names will be resolved to IP addresses in case
SPARK_LOCAL_HOSTNAME is unset
+ * to fix the task locality levels always being 'ANY' issue mentioned in
SPARK-10149.
*/
private [spark] case class HostTaskLocation(override val host: String)
extends TaskLocation {
- override def toString: String = host
+ override def toString: String = if ( TaskLocation.sparkLocalHostname ==
None ) {
+ InetAddress.getByName(host).getHostAddress
+ } else {
+ host
+ }
}
/**
* A location on a host that is cached by HDFS.
+ * The host names will be resolved to IP addresses in case
SPARK_LOCAL_HOSTNAME is unset
+ * to fix the task locality levels always being 'ANY' issue mentioned in
SPARK-10149.
*/
private [spark] case class HDFSCacheTaskLocation(override val host:
String) extends TaskLocation {
- override def toString: String = TaskLocation.inMemoryLocationTag + host
+ override def toString: String = if ( TaskLocation.sparkLocalHostname ==
None ) {
+ TaskLocation.inMemoryLocationTag +
InetAddress.getByName(host).getHostAddress
--- End diff --
better handle `InetAddress.getByName()` failure conditions here. It is
entirely possible for a host to not know its own name if configured badly
enough.
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