Bug 40673 - WebService memory leak
Summary: WebService memory leak
Status: NEW
Alias: None
Product: Class Libraries
Classification: Mono
Component: System.Web.Services ()
Version: 4.4.0 (C7)
Hardware: PC Windows
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2016-04-25 15:53 UTC by Tadej
Modified: 2016-12-16 13:19 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
NEW

Description Tadej 2016-04-25 15:53:03 UTC
Hello,

I'm using a self hosted HTTP JSON Webservice:

Uri serviceAddress = new Uri(HttpServiceUri);
mHttpServiceHost = new WebServiceHost(WebService, serviceAddress);
WebHttpBehavior beh = new WebHttpBehavior
{
 FaultExceptionEnabled = false,
 HelpEnabled = false
};
mHttpServiceHost.AddServiceEndpoint(typeof(IWebService), CMWCFBindings.GetWebBinding(), serviceAddress).Behaviors.Add(beh);
mHttpServiceHost.Open();

Using the web binding:

WebHttpBinding httpBind = new WebHttpBinding();
httpBind.MaxBufferSize = 204003200;
httpBind.MaxReceivedMessageSize = 204003200;
httpBind.AllowCookies = false;
httpBind.CrossDomainScriptAccessEnabled = true;

XmlDictionaryReaderQuotas rq = new XmlDictionaryReaderQuotas();
rq.MaxDepth = 2147483647;
rq.MaxArrayLength = 2147483647;
rq.MaxBytesPerRead = 2147483647;
rq.MaxStringContentLength = 2147483647;
rq.MaxNameTableCharCount = 2147483647;
httpBind.ReaderQuotas = rq;
return httpBind;

Using operation contracts like:

[OperationContract]
[WebInvoke(Method = "POST",
 RequestFormat = WebMessageFormat.Json,
 UriTemplate = "GetPanel")]
Stream GetPanel(GetPanelParams path);

Or:

[OperationContract]
[WebGet(UriTemplate = "GetClientData")]
Stream GetClientData();

Operation contracts convert data into JSON string and return memory stream: 

JavaScriptSerializer jss = new JavaScriptSerializer();
jss.MaxJsonLength = 100000000;
return new MemoryStream(Encoding.UTF8.GetBytes(jss.Serialize(obj)));

In Mono version 4.2.1.91 the WebService specified above works perfectly. Recently I tried upgrading to Mono 4.4.0.40 where I'm noticing a memory leak with each service call. The memory is rising quickly until the application crashes.

Operating system: Arch Linux
Hardware: Raspberry Pi 2
Comment 1 Alex 2016-12-16 08:38:22 UTC
I think a root of this problem is the same with one described in:
https://bugzilla.xamarin.com/show_bug.cgi?id=49114
Comment 2 Tadej 2016-12-16 13:19:35 UTC
Yes Alex, looks like the same problem. I'm still stuck on version 4.2.1.91.