Github user tgravescs commented on a diff in the pull request: https://github.com/apache/spark/pull/4688#discussion_r28961772 --- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala --- @@ -138,6 +140,12 @@ private[spark] class ApplicationMaster( // doAs in order for the credentials to be passed on to the executor containers. val securityMgr = new SecurityManager(sparkConf) + // If the credentials file config is present, we must periodically renew tokens. So create + // a new AMDelegationTokenRenewer + if(sparkConf.contains("spark.yarn.credentials.file")) { --- End diff -- nit, space after if
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