1 files changed, 1 insertions, 1 deletions
diff --git a/core/src/main/scala/org/apache/spark/ui/exec/ExecutorThreadDumpPage.scala b/core/src/main/scala/org/apache/spark/ui/exec/ExecutorThreadDumpPage.scala
index c82730f524..f0ae95bb8c 100644
--- a/core/src/main/scala/org/apache/spark/ui/exec/ExecutorThreadDumpPage.scala
+++ b/core/src/main/scala/org/apache/spark/ui/exec/ExecutorThreadDumpPage.scala
@@ -43,7 +43,7 @@ private[ui] class ExecutorThreadDumpPage(parent: ExecutorsTab) extends WebUIPage
         }
         id
     }.getOrElse {
-      return Text(s"Missing executorId parameter")
+      throw new IllegalArgumentException(s"Missing executorId parameter")
     }
     val time = System.currentTimeMillis()
     val maybeThreadDump = sc.get.getExecutorThreadDump(executorId)