Msbuild not supporting multi thread solution build

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MSBuild

I have a situation to build multiple solution using MSBUILD in multi threading, but during build, always few solution get failed. I have try to build each solution one by one , its working perfectly. but i have try to build 5 solution using multi threading, few build get failed. As I investigated the build log file of both success build and failure build, it seems MSBUILD getting conflict with each build process. For reference I have attached two text file of build log.

Build start for submission ID 11468

Build start for submission ID 11468

string SolutionPath = System.IO.Directory.GetFiles(SolutionFolder, "*.sln").FirstOrDefault();
                WriteLog("A", TimeStartExecute.ElapsedMilliseconds.ToString(), string.Format("Build solution name {0}", SolutionPath));
                ProjectCollection pc = new ProjectCollection();
                Dictionary GlobalProperty = new Dictionary();
                GlobalProperty.Add("Configuration", appConfiguration);
                GlobalProperty.Add("Platform", appPlatform);
                //GlobalProperty.Add("Platform", "x86");
                GlobalProperty.Add("OutputPath", appOutputPath);
                GlobalProperty.Add("VisualStudioVersion", appVSVersion);
                GlobalProperty.Add("BuildInParallel", "true");
                GlobalProperty.Add("maxcpucount", "2");
                BuildParameters bp = new BuildParameters(pc);
                 

                if (appBuildLogger.Equals("true"))
                {
                    bp.Loggers = new[]
                    {
                        new FileLogger
                        {
                        Verbosity = LoggerVerbosity.Detailed,
                        ShowSummary = true,
                        SkipProjectStartedText = true,
                        Parameters=@"Logfile="+SolutionFolder+"\\build.log"
                        }
                    };
                }
 using (BuildManager objBuildManager = new BuildManager())
 {
 BuildRequestData BuildRequest = new BuildRequestData(SolutionPath, GlobalProperty, "14.0", new string[]
 { "Build" }, null,
    BuildRequestDataFlags.ReplaceExistingProjectInstance);
    BuildResult buildResult = objBuildManager.Build(bp, BuildRequest)
 if (buildResult.OverallResult == BuildResultCode.Success)
 {
  buildPath = Convert.ToString(buildResult.ResultsByTarget.FirstOrDefault(x =>
x.Key == "Build").Value.Items[0]);
 }
}

What I have tried:

After investigation found the problem in build process by build log..

Success build log https://github.com/Microsoft/msbuild/files/1115978/11468.success.txt

failure build log https://github.com/Microsoft/msbuild/files/1115979/11468.failed.txt