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[SPARK-10473][YARN]Login again in the driver to avoid the events lossing. #8942

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[SPARK-10473][YARN]Login again in the driver to avoid the events lossing. #8942

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16 changes: 16 additions & 0 deletions core/src/main/scala/org/apache/spark/SparkContext.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ import scala.util.control.NonFatal

import org.apache.commons.lang.SerializationUtils
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.security.UserGroupInformation
import org.apache.hadoop.fs.Path
import org.apache.hadoop.io.{ArrayWritable, BooleanWritable, BytesWritable, DoubleWritable,
FloatWritable, IntWritable, LongWritable, NullWritable, Text, Writable}
Expand Down Expand Up @@ -440,6 +441,16 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli

_conf.set("spark.externalBlockStore.folderName", externalBlockStoreFolderName)

var principal: String = null
var keytab: String = null

if (master.startsWith("yarn")) {
if (_conf.contains("spark.yarn.principal") && _conf.contains("spark.yarn.keytab")) {
principal = _conf.get("spark.yarn.principal")
keytab = _conf.get("spark.yarn.keytab")
}
}

if (master == "yarn-client") System.setProperty("SPARK_YARN_MODE", "true")

// "_jobProgressListener" should be set up before creating SparkEnv because when creating
Expand Down Expand Up @@ -569,6 +580,11 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
}
_cleaner.foreach(_.start())

if (null != principal && UserGroupInformation.isSecurityEnabled) {
UserGroupInformation.loginUserFromKeytab(principal, keytab)
logInfo("Successfully logged into the KDC in SparkContext.")
}

setupAndStartListenerBus()
postEnvironmentUpdate()
postApplicationStart()
Expand Down