From b7a3a834d02ae4c0cb904e43e35ce85d22017b77 Mon Sep 17 00:00:00 2001
From: Alan West <3676547+alanwest@users.noreply.github.com>
Date: Fri, 24 Jun 2022 13:12:11 -0700
Subject: [PATCH] Handle possible exception when initializing the default
 service name (#3405)

---
 src/OpenTelemetry/CHANGELOG.md                |  3 ++
 .../Resources/ResourceBuilder.cs              | 32 +++++++++++++++----
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/src/OpenTelemetry/CHANGELOG.md b/src/OpenTelemetry/CHANGELOG.md
index 3b4cc4c70fe..bad0e536281 100644
--- a/src/OpenTelemetry/CHANGELOG.md
+++ b/src/OpenTelemetry/CHANGELOG.md
@@ -22,6 +22,9 @@
   `set` methods
   ([#3378](https://github.com/open-telemetry/opentelemetry-dotnet/pull/3378))
 
+* Handle possible exception when initializing the default service name.
+  ([#3405](https://github.com/open-telemetry/opentelemetry-dotnet/pull/3405))
+
 ## 1.3.0
 
 Released 2022-Jun-03
diff --git a/src/OpenTelemetry/Resources/ResourceBuilder.cs b/src/OpenTelemetry/Resources/ResourceBuilder.cs
index c4c8ac15a6e..3abb89ea750 100644
--- a/src/OpenTelemetry/Resources/ResourceBuilder.cs
+++ b/src/OpenTelemetry/Resources/ResourceBuilder.cs
@@ -15,6 +15,7 @@
 // </copyright>
 
 using System.Collections.Generic;
+using System.Diagnostics;
 using OpenTelemetry.Internal;
 
 namespace OpenTelemetry.Resources
@@ -26,17 +27,34 @@ public class ResourceBuilder
     {
         private readonly List<Resource> resources = new();
 
-        private ResourceBuilder()
+        static ResourceBuilder()
         {
+            var defaultServiceName = "unknown_service";
+
+            try
+            {
+                var processName = Process.GetCurrentProcess().ProcessName;
+                if (!string.IsNullOrWhiteSpace(processName))
+                {
+                    defaultServiceName = $"{defaultServiceName}:{processName}";
+                }
+            }
+            catch
+            {
+                // GetCurrentProcess can throw PlatformNotSupportedException
+            }
+
+            DefaultResource = new Resource(new Dictionary<string, object>
+            {
+                [ResourceSemanticConventions.AttributeServiceName] = defaultServiceName,
+            });
         }
 
-        private static Resource DefaultResource { get; } = new Resource(new Dictionary<string, object>
+        private ResourceBuilder()
         {
-            [ResourceSemanticConventions.AttributeServiceName] = "unknown_service"
-                + (string.IsNullOrWhiteSpace(System.Diagnostics.Process.GetCurrentProcess().ProcessName)
-                ? string.Empty :
-                ":" + System.Diagnostics.Process.GetCurrentProcess().ProcessName),
-        });
+        }
+
+        private static Resource DefaultResource { get; }
 
         /// <summary>
         /// Creates a <see cref="ResourceBuilder"/> instance with Default