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I'm working on a simple .net core API and noticed a strange behavior I can't explain:

API works fine until a point (40-50 calls) where every calls fail and return a HTTP Error 502.3 - Bad Gateway after timeout.

After some investigations I figured out this behavior not appearing when I remove the ASPNETCORE_ENVIRONMENT (set to development) in config files.

So, concretely, which differences implies my ASPNETCORE_ENVIRONMENT setted to Development? How can I manage to get it work with this setting?

public class Startup

 public Startup(IConfiguration configuration)
 
 Configuration = configuration;
 

 public IConfiguration Configuration get; 

 // This method gets called by the runtime. Use this method to add services to the container.
 public void ConfigureServices(IServiceCollection services)
 
 var dbString = Configuration["Database:ConnectionString"];

 services.AddScoped<ISearchEngineRepository, SearchEngineRepository>();
 services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
 services.AddDbContext<VvpDbContext>(options => options.UseSqlServer(dbString), ServiceLifetime.Transient);
 services.AddSingleton(Configuration);
 services.AddCors();
 

 // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
 public void Configure(IApplicationBuilder app, IHostingEnvironment env)
 
 if (env.IsDevelopment())
 
 app.UseDeveloperExceptionPage();
 app.UseCors(options => options.WithOrigins("http://localhost:4200").AllowAnyMethod());
 
 else
 
 app.UseHsts();
 

 app.UseMvc();