Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9232#discussion_r43336052
--- Diff:
yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
---
@@ -245,4 +247,55 @@ class YarnSparkHadoopUtilSuite extends SparkFunSuite
with Matchers with Logging
System.clearProperty("SPARK_YARN_MODE")
}
}
+
+ test("Obtain tokens For HiveMetastore") {
+ val hadoopConf = new Configuration()
+ hadoopConf.set("hive.metastore.kerberos.principal", "bob")
+ // thrift picks up on port 0 and bails out, without trying to talk to
endpoint
+ hadoopConf.set("hive.metastore.uris", "http://localhost:0";)
+ val util = new YarnSparkHadoopUtil
+ val e = intercept[InvocationTargetException] {
+ util.obtainTokenForHiveMetastoreInner(hadoopConf, "alice")
+ }
+ assertNestedHiveException(e)
+ // expect exception trapping code to unwind this hive-side exception
+ assertNestedHiveException(intercept[InvocationTargetException] {
+ util.obtainTokenForHiveMetastore(hadoopConf)
+ })
+ }
+
+ def assertNestedHiveException(e: InvocationTargetException): Throwable =
{
+ val inner = e.getCause
+ if (inner == null) {
+ fail("No inner cause", e)
+ }
+ if (!inner.isInstanceOf[HiveException]) {
+ fail(s"Not a hive exception", inner)
+ }
+ inner
+ }
+
+ test("handleTokenIntrospectionFailure") {
+ val util = new YarnSparkHadoopUtil
+ // downgraded exceptions
+ util.handleTokenIntrospectionFailure("hive", new
ClassNotFoundException("cnfe"))
--- End diff --
Or yet another option is to have the method that handles exception take a
closure, instead of the current approach of a method that matches on an
exception parameter. e.g.:
def tryToGetTokens(service: String)(fn: () => Option[Token]):
Option[Token] = {
try {
fn()
} catch {
...
}
}
def obtainTokenForHiveMetastore... = {
tryToGetTokens("Hive") { obtainTokenForHiveMetastoreInner(...) }
}
I mostly dislike that exception handling feels like it's scattered around.
You have a catch block in one place, then match on the exception somewhere
else, it makes it hard to see what's really being done in one look.
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