catching the exception without crashing the workload for Redis version handling

Author: vaishalitvv

src/VirtualClient/VirtualClient.Actions/Redis/RedisServerExecutor.cs

@@ -5,7 +5,6 @@ namespace VirtualClient.Actions
 {
     using System;
     using System.Collections.Generic;
-    using System.IO;
     using System.Linq;
     using System.Net;
     using System.Net.Http;
@@ -270,24 +269,27 @@ protected override void Validate()
 
         private async Task CaptureRedisVersionAsync(EventContext telemetryContext, CancellationToken token)
         {
-            string command = $"{this.RedisExecutablePath} --version";
-            IProcessProxy process = await this.ExecuteCommandAsync(command, null, this.RedisPackagePath, telemetryContext, token, runElevated: true);
-            string output = process.StandardOutput.ToString();
-            Match match = Regex.Match(output, @"v=(\d+\.\d+\.\d+)");
-            if (match.Success)
+            try
             {
-                this.RedisVersion = match.Groups[1].Value;
-                telemetryContext.AddContext("RedisVersion", this.RedisVersion);
-                this.Logger.LogMessage($"{this.TypeName}.RedisVersionCaptured", LogLevel.Information, telemetryContext);
-                this.MetadataContract.AddForScenario(
-                    "Redis-Benchmark",
-                    null,
-                    toolVersion: this.RedisVersion);
-                this.MetadataContract.Apply(telemetryContext);
+                string command = $"{this.RedisExecutablePath} --version";
+                IProcessProxy process = await this.ExecuteCommandAsync(command, null, this.RedisPackagePath, telemetryContext, token, runElevated: true);
+                string output = process.StandardOutput.ToString();
+                Match match = Regex.Match(output, @"v=(\d+\.\d+\.\d+)");
+                this.RedisVersion = match.Success ? match.Groups[1].Value : null;
+                if (!string.IsNullOrEmpty(this.RedisVersion))
+                {
+                    telemetryContext.AddContext("RedisVersion", this.RedisVersion);
+                    this.Logger.LogMessage($"{this.TypeName}.RedisVersionCaptured", LogLevel.Information, telemetryContext);
+                    this.MetadataContract.AddForScenario(
+                        "Redis-Benchmark",
+                        null,
+                        toolVersion: this.RedisVersion);
+                    this.MetadataContract.Apply(telemetryContext);
+                }
             }
-            else
+            catch (Exception ex)
             {
-                throw new WorkloadException("Failed to parse Redis version from output.", ErrorReason.CriticalWorkloadFailure);
+                this.Logger.LogErrorMessage(ex, telemetryContext);
             }
         }