Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9232#discussion_r43195162
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala ---
@@ -142,6 +145,99 @@ class YarnSparkHadoopUtil extends SparkHadoopUtil {
val containerIdString =
System.getenv(ApplicationConstants.Environment.CONTAINER_ID.name())
ConverterUtils.toContainerId(containerIdString)
}
+
+ /**
+ * Obtains token for the Hive metastore, using the current user as the
principal.
+ * Some exceptions are caught and downgraded to a log message.
+ * @param conf hadoop configuration; the Hive configuration will be
based on this
+ * @return a token, or `None` if there's no need for a token (no
metastore URI or principal
+ * in the config), or if a binding exception was caught and
downgraded.
+ */
+ def obtainTokenForHiveMetastore(conf: Configuration):
Option[Token[DelegationTokenIdentifier]] = {
+ try {
+ obtainTokenForHiveMetastoreInner(conf,
UserGroupInformation.getCurrentUser().getUserName)
+ } catch {
+ case e: Exception => {
+ handleTokenIntrospectionFailure("Hive", e)
+ None
+ }
+ }
+ }
+
+ /**
+ * Handle failures to obtain a token through introspection. Failures to
load the class are
+ * not treated as errors: anything else is.
+ * @param service service name for error messages
+ * @param thrown exception caught
+ * @throws Exception if the `thrown` exception isn't one that is to be
ignored
+ */
+ private[yarn] def handleTokenIntrospectionFailure(service: String,
thrown: Throwable): Unit = {
+ thrown match {
+ case e: ClassNotFoundException =>
+ logInfo(s"$service class not found $e")
+ logDebug("Hive Class not found", e)
+ case t: Throwable => {
--- End diff --
I don't follow. You're catching an exception, logging it, and re-throwing
it, which causes the exception to show up twice in the process output.
Instead, you can just delete your code, and let the exception propagate
naturally. It will show up in the output the same way.
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