Error -32 EPIPE broken pipe

[wdmeest]

I am doing a post request with ajax that should return a partialview but I always get following error in log:

Connection id "0HL6PHMI6GKUP" communication error.
Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.UvException: Error -32 EPIPE broken pipe

When looking at the debug log, I see that it is loading the partialview data but than I get the error.

I can't find anything on the net about the -32 EPIPE error, could someone help me explain what this error means?

Ajax call

$( "#PostForm" ).submit(function( event ) {

    //Ajax call
    $.ajax({
        type: 'POST',
        url: "/url/path/", 
        data: {
            "id": $("#RackId").val(),
            "Name": $("#Name").val()
        },
        success: function(result){
            $("#modal").html(result);
        }
    });
});

Application info

Aspnet core: 1.1.0
OS: ubuntu 16.04

project.json

{
"dependencies": {
 "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
 "Microsoft.Extensions.Configuration.Json": "1.1.0",
 "Microsoft.Extensions.Configuration.CommandLine": "1.1.0",
 "Microsoft.Extensions.Configuration.UserSecrets": "1.1.0",
 "Microsoft.AspNetCore.Mvc": "1.1.0",
 "Microsoft.AspNetCore.Routing": "1.1.0",
 "Microsoft.AspNetCore.Localization": "1.1.0",
 "Microsoft.Extensions.Localization": "1.1.0",
 "Microsoft.AspNetCore.Authentication.Cookies": "1.1.0",
 "Microsoft.AspNetCore.Razor.Tools": "1.1.0-preview4-final",
 "Microsoft.AspNetCore.StaticFiles": "1.1.0",
 "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.0",
 "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.1.0",
 "Microsoft.EntityFrameworkCore": "1.1.0",
 "Microsoft.EntityFrameworkCore.Design": "1.1.0",
 "Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final",
 "Npgsql.EntityFrameworkCore.PostgreSQL": "1.1.0",
 "Npgsql.EntityFrameworkCore.PostgreSQL.Design": "1.1.0",
 "Microsoft.Extensions.Logging.Debug": "1.1.0",
 "Microsoft.Extensions.Logging": "1.1.0",
 "Microsoft.Extensions.Logging.Console": "1.1.0",
 "Microsoft.AspNetCore.Diagnostics": "1.1.0",
 "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
 "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final",
 "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
 "Microsoft.AspNetCore.Hosting": "1.1.0",
 "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0",
 "Microsoft.AspNetCore.Rewrite": "1.0.2",
 "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.1.0",
 "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
   "version": "1.1.0-preview4-final",
   "type": "build"
 },
 "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
   "version": "1.1.0-preview4-final",
   "type": "build"
 },
 "JsonApiFramework.Core": "1.1.3-beta",
 "JsonApiFramework.Server": "1.1.3-beta",
 "Microsoft.AspNetCore.Authentication.JwtBearer": "1.1.0",
 "MailKit": "1.10.1",
 "System.IdentityModel.Tokens.Jwt": "5.1.2",
 "Microsoft.IdentityModel.Tokens": "5.1.2",
 "Markdown": "2.2.0",
 "LinqKit.Core": "1.1.8",
 "Newtonsoft.Json": "9.0.2-beta2",
 "Microsoft.AspNetCore.Session": "1.1.0",
 "Microsoft.Extensions.Caching.Memory": "1.1.0",
 "morelinq": "2.3.0",
 "NLog": "5.0.0-beta07",
 "NLog.Web.AspNetCore": "4.3.1",
 "NLog.Extensions.Logging": "1.0.0-rtm-beta3"
},
"tools": {
 "BundlerMinifier.Core": "2.2.306",
 "Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4-final",
 "Microsoft.Extensions.SecretManager.Tools": "1.1.0-preview4-final",
 "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
   "version": "1.1.0-preview4-final",
   "imports": [
     "portable-net45+win8"
   ]
 }
},
"frameworks": {
 "netcoreapp1.1": {
   "dependencies": {
     "Microsoft.NETCore.App": {
       "version": "1.1.0",
       "type": "platform"
     }
   },
   "imports": [
     "dotnet5.6",
     "portable-net45+win8"
   ]
 }
},
"buildOptions": {
 "emitEntryPoint": true,
 "preserveCompilationContext": true,
 "debugType": "portable"
},
"runtimeOptions": {
 "configProperties": {
   "System.GC.Server": true
 }
},
"publishOptions": {
 "include": [
   "wwwroot",
   "**/*.cshtml",
   "appsettings.json",
   "web.config",
   "Dockerfile.debug",
   "Dockerfile",
   "docker-compose.debug.yml",
   "docker-compose.yml",
   "nlog.config"
 ]
},
"scripts": {
 "precompile": [
   "dotnet bundle"
 ],
 "prepublish": [
   "bower install"
 ],
 "postpublish": [
   "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%"
 ]
},
"tooling": {
 "defaultNamespace": "application"
}
}

[halter73]

The "communication error" usually comes in ECONNRESET, EPIPE, and ECANCELED varieties. Which one you get usually just depends on which platform you're running on, but all three generally mean the same thing: that the client closed the connection ungracefully.

I have a theory why this is happening. I think that the page might be getting reloaded mid-xhr causing the xhr to get aborted. This can be fixed by returning false from your jQuery submit callback.

I took all your dependencies and your jQuery snippet and demonstrated how this page reload can cause an EPIPE on linux and an ECANCELED on Windows in a sample repro at https://github.com/halter73/EPIPE. It uses csproj instead of project.json because I don't have an old CLI that supports project.json easily available.

Here's where I included your JavaScript snippet.

[wdmeest]

return false seems to work!

Thank you very much for your help and the information! ;)