Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/17872#discussion_r114985141
--- Diff:
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/security/HadoopFSCredentialProvider.scala
---
@@ -81,8 +90,15 @@ private[security] class HadoopFSCredentialProvider
sparkConf.get(PRINCIPAL).flatMap { renewer =>
val creds = new Credentials()
hadoopFSsToAccess(hadoopConf, sparkConf).foreach { dst =>
- val dstFs = dst.getFileSystem(hadoopConf)
- dstFs.addDelegationTokens(renewer, creds)
+ try {
+ val dstFs = dst.getFileSystem(hadoopConf)
+ dstFs.addDelegationTokens(renewer, creds)
+ } catch {
+ case e: StandbyException =>
+ logWarning(s"Namenode ${dst} is in state standby", e)
+ case e: RemoteException =>
--- End diff --
I'd suggested adding a handler for UnknownHostException too, but now I
think that could hide problems with client config. Best to leave as is.
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