From cd5fc81bddeaef0542b186b0ec9dfb53c5cfcbc2 Mon Sep 17 00:00:00 2001
From: Kai Yang <kfstorm@outlook.com>
Date: Wed, 15 Jan 2020 19:31:56 +0800
Subject: [PATCH] Show the exit code if RunManager failed to start a process
 (#6797)

---
 .../src/main/java/org/ray/runtime/runner/RunManager.java       | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/java/runtime/src/main/java/org/ray/runtime/runner/RunManager.java b/java/runtime/src/main/java/org/ray/runtime/runner/RunManager.java
index 6f825c383..9ead9af16 100644
--- a/java/runtime/src/main/java/org/ray/runtime/runner/RunManager.java
+++ b/java/runtime/src/main/java/org/ray/runtime/runner/RunManager.java
@@ -146,7 +146,8 @@ public class RunManager {
       e.printStackTrace();
     }
     if (!p.isAlive()) {
-      throw new RuntimeException("Failed to start " + name);
+      throw new RuntimeException(
+          String.format("Failed to start %s. Exit code: %d.", name, p.exitValue()));
     }
     processes.add(Pair.of(name, p));
     if (LOGGER.isInfoEnabled()) {