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[SPARK-6207] [YARN] [SQL] Adds delegation tokens for metastore to conf. #5031

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dougb wants to merge 4 commits into from
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[SPARK-6207] [YARN] [SQL] Adds delegation tokens for metastore to conf. #5031

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bf356d2
[SPARK-6207] [YARN] [SQL] Adds delegation tokens for metastore to conf.
Mar 15, 2015
1ab1729
Merge branch 'master' of git://github.com/apache/spark into SPARK-6207
Apr 7, 2015
e260765
[SPARK-6207] Second pass at adding Hive delegation token to conf.
Apr 8, 2015
3e9ac16
[SPARK-6207] Fixes minor code spacing issues.
Apr 10, 2015
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63 changes: 63 additions & 0 deletions yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -22,17 +22,21 @@ import java.nio.ByteBuffer

import scala.collection.JavaConversions._
import scala.collection.mutable.{ArrayBuffer, HashMap, ListBuffer, Map}
import scala.reflect.runtime.universe
import scala.util.{Try, Success, Failure}

import com.google.common.base.Objects

import org.apache.hadoop.io.DataOutputBuffer
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier
import org.apache.hadoop.fs._
import org.apache.hadoop.fs.permission.FsPermission
import org.apache.hadoop.io.Text
import org.apache.hadoop.mapred.Master
import org.apache.hadoop.mapreduce.MRJobConfig
import org.apache.hadoop.security.{Credentials, UserGroupInformation}
import org.apache.hadoop.security.token.Token
import org.apache.hadoop.util.StringUtils
import org.apache.hadoop.yarn.api._
import org.apache.hadoop.yarn.api.ApplicationConstants.Environment
Expand Down Expand Up @@ -219,6 +223,7 @@ private[spark] class Client(
val dst = new Path(fs.getHomeDirectory(), appStagingDir)
val nns = getNameNodesToAccess(sparkConf) + dst
obtainTokensForNamenodes(nns, hadoopConf, credentials)
obtainTokenForHiveMetastore(hadoopConf, credentials)

val replication = sparkConf.getInt("spark.yarn.submit.file.replication",
fs.getDefaultReplication(dst)).toShort
Expand Down Expand Up @@ -919,6 +924,64 @@ object Client extends Logging {
}
}

/**
* Obtains token for the Hive metastore and adds them to the credentials.
*/
private def obtainTokenForHiveMetastore(conf: Configuration, credentials: Credentials) {
if (UserGroupInformation.isSecurityEnabled) {
val mirror = universe.runtimeMirror(getClass.getClassLoader)

try {
val hiveClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.ql.metadata.Hive")
val hive = hiveClass.getMethod("get").invoke(null)

val hiveConf = hiveClass.getMethod("getConf").invoke(hive)
val hiveConfClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.conf.HiveConf")

val hiveConfGet = (param:String) => Option(hiveConfClass
.getMethod("get", classOf[java.lang.String])
.invoke(hiveConf, param))

val metastore_uri = hiveConfGet("hive.metastore.uris")

// Check for local metastore
if (metastore_uri != None && metastore_uri.get.toString.size > 0) {
val metastore_kerberos_principal_conf_var = mirror.classLoader
.loadClass("org.apache.hadoop.hive.conf.HiveConf$ConfVars")
.getField("METASTORE_KERBEROS_PRINCIPAL").get("varname").toString

val principal = hiveConfGet(metastore_kerberos_principal_conf_var)

val username = Option(UserGroupInformation.getCurrentUser().getUserName)
if (principal != None && username != None) {
val tokenStr = hiveClass.getMethod("getDelegationToken",
classOf[java.lang.String], classOf[java.lang.String])
.invoke(hive, username.get, principal.get).asInstanceOf[java.lang.String]

val hive2Token = new Token[DelegationTokenIdentifier]()
hive2Token.decodeFromUrlString(tokenStr)
credentials.addToken(new Text("hive.server2.delegation.token"),hive2Token)
logDebug("Added hive.Server2.delegation.token to conf.")
hiveClass.getMethod("closeCurrent").invoke(null)
} else {
logError("Username or principal == NULL")
logError(s"""username=${username.getOrElse("(NULL)")}""")
logError(s"""principal=${principal.getOrElse("(NULL)")}""")
throw new IllegalArgumentException("username and/or principal is equal to null!")
}
} else {
logDebug("HiveMetaStore configured in localmode")
}
} catch {
case e:java.lang.NoSuchMethodException => { logInfo("Hive Method not found " + e); return }
case e:java.lang.ClassNotFoundException => { logInfo("Hive Class not found " + e); return }
case e:Exception => { logError("Unexpected Exception " + e)
throw new RuntimeException("Unexpected exception", e)
}
}
}
}

/**
* Return whether the two file systems are the same.
*/
Expand Down