From eb66db3199cb4fcc027f8c80d5f1833ae85bb9a4 Mon Sep 17 00:00:00 2001
From: Lixin Wei <wlx65005@gmail.com>
Date: Sat, 29 Aug 2020 00:17:08 +0800
Subject: [PATCH] [Build] bug fixed for logging (#10364)

---
 src/ray/util/logging.cc | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/ray/util/logging.cc b/src/ray/util/logging.cc
index cb3b06f5c..63e82ec65 100644
--- a/src/ray/util/logging.cc
+++ b/src/ray/util/logging.cc
@@ -173,12 +173,12 @@ void RayLog::StartRayLog(const std::string &app_name, RayLogLevel severity_thres
   log_dir_ = log_dir;
 #ifdef RAY_USE_GLOG
   google::InitGoogleLogging(app_name_.c_str());
-  // Enable log file if log_dir_ is not empty.
-  std::string dir_ends_with_slash = log_dir_;
-  if (!ray::IsDirSep(log_dir_[log_dir_.length() - 1])) {
-    dir_ends_with_slash += ray::GetDirSep();
-  }
   if (!log_dir_.empty()) {
+    // Enable log file if log_dir_ is not empty.
+    std::string dir_ends_with_slash = log_dir_;
+    if (!ray::IsDirSep(log_dir_[log_dir_.length() - 1])) {
+      dir_ends_with_slash += ray::GetDirSep();
+    }
     std::string app_name_without_path = app_name;
     if (app_name.empty()) {
       app_name_without_path = "DefaultApp";