From cae253455831ff83d89c730fdb1342ed9b0ff7a3 Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Wed, 20 Sep 2023 07:22:33 +0800
Subject: [PATCH] params: log `prefix` on fail (#29973)

old-commit-hash: 81d4595c190c8fcbf3fa27d45d088449ae6c4f4e
---
 common/params.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/params.cc b/common/params.cc
index e510b60160..6722dbb3eb 100644
--- a/common/params.cc
+++ b/common/params.cc
@@ -64,7 +64,9 @@ bool create_params_path(const std::string &param_path, const std::string &key_pa
 std::string ensure_params_path(const std::string &prefix, const std::string &path = {}) {
   std::string params_path = path.empty() ? Path::params() : path;
   if (!create_params_path(params_path, params_path + prefix)) {
-    throw std::runtime_error(util::string_format("Failed to ensure params path, errno=%d, path=%s", errno, params_path.c_str()));
+    throw std::runtime_error(util::string_format(
+        "Failed to ensure params path, errno=%d, path=%s, param_prefix=%s",
+        errno, params_path.c_str(), prefix.c_str()));
   }
   return params_path;
 }