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Date: Thu, 24 Jul 2014 10:32:25 -0400
Message-ID: 
 <CAL8uD2u=-Y1POTwX_WKW5SWqNXLp7P0gjfa4Ef-BNtbF0Lr0CQ@mail.gmail.com>
Subject: Re: Log4net.ThreadContext.Properties Having stale data. How to
 resolve it?
From: Ananth Tatachar <ananth.tatachar@gmail.com>
To: Log4NET User <log4net-user@logging.apache.org>
Content-Type: multipart/alternative; boundary=001a11c2b05051552304fef153a4
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--001a11c2b05051552304fef153a4
Content-Type: text/plain; charset=UTF-8

Hi Dominik Psenner ,

Thanks a lot for replying , I am really sorry about my bad explanation of
my problem.

I am trying to create a custom Json Layout ,

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) The custom layout class:


 class MyJsonLayout:LayoutSkeleton
    {
        private HashSet<String> IncludeFieldsList { get; set; }

        public override void ActivateOptions()
        {

        }

        public override void Format(TextWriter writer, LoggingEvent
loggingEvent)
        {
            if(writer == null || loggingEvent == null)
            {
                throw new ArgumentNullException();
            }
            var myJsonObj = new MyJsonObject(loggingEvent,
IncludeFieldsList );
            var json =
JsonConvert.SerializeObject(myJsonObj,Formatting.None);
            writer.WriteLine(json);
        }
    }

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

2) The MyJsonObject class:

[JsonObject(MemberSerialization.OptIn)]
class MyJsonObject
    {
        [JsonProperty("@timestamp")]
        private DateTime TimeStamp { get; set; }

        [JsonProperty("@message", NullValueHandling =
NullValueHandling.Ignore)]
        private String Message { get; set; }

        [JsonProperty("@tid", NullValueHandling = NullValueHandling.Ignore)]
        private String Tid {get;set;}

        [JsonObject(MemberSerialization.OptIn)]
        private String MyGuid {get;set;}

       public MyJsonObject(LoggingEvent loggingEvent)
       {
            var lgData = loggingEvent.GetLoggingEventData(); // For some
reason if I dont do this , all the loggingEvent.Properties are null. I did
not understand this.
            TimeStamp = loggingEvent.TimeStamp;
            MyGuid = loggingEvent.Properties["myguid"];
            //loggingEvent.Properties.Remove("myguid"); I tried doing this
, but nothing changed in my output.
            Message = loggingEvent.Properties["message"];
            Tid = loggingEvent.Properties["tid"];
       }

    }

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

3) The Place where I put data into log4net.ThreadContext.Properties:

class MyInstatntiationClass
    {
        log4net.ThreadContext.Properties["myguid"] =
Guid.NewGuid().ToString();
        log4net.ThreadContext.Properties["tid"]
= System.Threading.Thread.CurrentThread.ManagedThreadId.ToString();
    }


---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

4) My Web.config file:



<appender name="RollingLocalFileAppender"
type="log4net.Appender.RollingFileAppender">
      <file type="log4net.Util.PatternString" value="C:\Logs\JSON.log" />
      <rollingStyle value="Date" />
      <datePattern value="yyyy-MM-dd" />
      <maxSizeRollBackups value="10" />
      <appendToFile value="true" />
      <layout type="MyJsonLayout, Version=1.0.0.0, Culture=neutral">
      </layout>
    </appender>


--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

5) Output file:


{"@timestamp":"2014-07-24T10:20:32.1223183-04:00"
,"@tid":"5","@myguid":dfg134xcd_dfe-123uier00"}
{"@timestamp":"2014-07-24T10:20:32.3213382-04:00","@tid":"5","@myguid":
dfg134xcd_dfe-123uier00"}
{"@timestamp":"2014-07-24T10:20:32.8273888-04:00","@tid":"5","@myguid":
dfg134xcd_dfe-123uier00"}
{"@timestamp":"2014-07-24T10:20:32.8273888-04:00","@tid":"6","@myguid":fgsg
4678xzv-adfry-2356i"}


Expected behaviour:

Each of my calls should result in unique guids. But as you can see I am
getting stale guids.


---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------


I have two concerns :

1) As you can see in the output file the guid are stale. While executing I
carefully monitered the place where guid is being generated : in file
number 3 in this file: MyInstatntiationClass.
All the generated guids were unique , however while logging I got stale
data. Also One other thing I noticed was , when I put the current thread to
sleep for 50 ms , I see valid unique guids in the output.
I believe old thread data is being used.


2) I did not understand the use of LoggingEventData. In file number 2 :
MyJsonObject , If I dont make this call :var lgData =
loggingEvent.GetLoggingEventData(); I get null values from
loggingEvent.Properties.




Thanks a lot for your help in advance ...















On Thu, Jul 24, 2014 at 2:40 AM, Dominik Psenner <dpsenner@gmail.com> wrote:

> Hi Ananth Tatachar,
>
> I'm having a hard time understanding your problem. Can you provide us a
> sample application including all the code together with both a broken
> sample output and a expected sample output? It would also be interesting
> which exact version of log4net you are using.
>
> Best regards
>
>
>
> 2014-07-24 2:31 GMT+02:00 Ananth Tatachar <ananth.tatachar@gmail.com>:
>
>
>>
>> ---------- Forwarded message ----------
>> From: Ananth Tatachar <ananth.tatachar@gmail.com>
>> Date: Wed, Jul 23, 2014 at 8:24 PM
>> Subject: Log4net.ThreadContext.Properties Having stale data. How to
>> resolve it?
>> To: log4net-user@logging.apache.org
>>
>>
>> I am using a RollingFileAppender , and my own custom layout. My
>> application is multithreaded. Each thread will generate unique random data
>> and is supposed to log it using log4net framework. However if I create
>> multiple threads in quick succession I notice stale data in my logs , this
>> goes away if each thread sleeps for 50 ms before logging. I am not able to
>> figure out a solution to this issue or find its cause please do help me.
>>
>> My logging function looks like this:
>>
>>
>>     log4net.ThreadContext.properties["randomGeneratedData"] =
>> randomGeneratedData;
>>     private ILog myLog =
>>            LogManager.GetLogger(typeof(LogTest));
>>     using (log4net.NDC.Push("ndcTest1"))
>>     {
>>         using (log4net.NDC.Push("ndcTest2"))
>>             {
>>                 myLog.Info("myLogTest");
>>             }
>>     }
>>
>>
>>
>>
>>
>> Result of logging:
>>
>>         NDC = "ndcTest1 ndcTest2" , randomGeneratedData = rad1
>>        NDC = "ndcTest1 ndcTest2" , randomGeneratedData = rad2
>>        NDC = "", randomGeneratedData = rad2
>>
>> and so on ...
>>
>>
>> I tried to clear log4net.ThreadContext.Properties before filling it again
>> , but it was of no use. Please help.
>>
>>
>
>
> --
> Dominik Psenner
>

--001a11c2b05051552304fef153a4
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Dominik Psenner ,<div><br></div><div>Thanks a lot for r=
eplying , I am really sorry about my bad explanation of my problem.</div><d=
iv><br></div><div>I am trying to create a custom Json Layout ,=C2=A0</div><=
div>
<br></div><div>------------------------------------------------------------=
---------------------------------------------------------------------------=
-------------------------------------------</div><div>1) The custom layout =
class:</div>
<div><br></div><div><br></div><div><div>=C2=A0class MyJsonLayout:LayoutSkel=
eton</div><div>=C2=A0 =C2=A0 {</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 privat=
e HashSet&lt;String&gt; IncludeFieldsList { get; set; }</div><div><br></div=
><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 public override void ActivateOptions()</d=
iv>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 {</div><div><br></div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 }</div><div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 public=
 override void Format(TextWriter writer, LoggingEvent loggingEvent)</div><d=
iv>=C2=A0 =C2=A0 =C2=A0 =C2=A0 {</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 if(writer =3D=3D null || loggingEvent =3D=3D null)</div>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 {</div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 throw new ArgumentNullException()=
;</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 }</div><div>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 var myJsonObj =3D new MyJsonObject(loggi=
ngEvent, IncludeFieldsList );</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 var json =3D JsonConvert.SerializeObject(myJsonObj,Formatting.None);=
</div>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 writer.WriteLine(json);</div=
><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 }</div><div>=C2=A0 =C2=A0 }</div></div><d=
iv><br></div><div>---------------------------------------------------------=
---------------------------------------------------------------------------=
-------------------------------------------------------</div>
<div><br></div><div>2) The MyJsonObject class:</div><div><br></div><div>[Js=
onObject(MemberSerialization.OptIn)]<br></div><div>class MyJsonObject</div>=
<div>=C2=A0 =C2=A0 {</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 [JsonProperty(&q=
uot;@timestamp&quot;)]</div>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 private DateTime TimeStamp { get; set; }</=
div><div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 [JsonProperty(&quot;@me=
ssage&quot;, NullValueHandling =3D NullValueHandling.Ignore)]</div><div>=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 private String Message { get; set; }</div>
<div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 [JsonProperty(&quot;@tid&qu=
ot;, NullValueHandling =3D NullValueHandling.Ignore)]</div><div>=C2=A0 =C2=
=A0 =C2=A0 =C2=A0 private String Tid {get;set;}</div><div><br></div><div>=
=C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0[JsonObject(MemberSerialization.OptIn)]</d=
iv>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 private String MyGuid {get;set;}</div><div=
><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0public MyJsonObject(LoggingEvent=
 loggingEvent)</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0{</div><div><div>=C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<font color=3D"#ff0000"> var lgData =3D =
loggingEvent.GetLoggingEventData(); // For some reason if I dont do this , =
all the loggingEvent.Properties are null. I did not understand this.</font>=
</div>
</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0TimeStamp =3D log=
gingEvent.TimeStamp;</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 My=
Guid =3D loggingEvent.Properties[&quot;myguid&quot;];</div><div>=C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 //loggingEvent.Properties.Remove(&quot;mygu=
id&quot;); I tried doing this , but nothing changed in my output.</div>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Message =3D loggingEvent.Pro=
perties[&quot;message&quot;];</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 Tid =3D loggingEvent.Properties[&quot;tid&quot;];</div><div>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0}</div><div><br></div><div>=C2=A0 =C2=A0 }</div><div><b=
r></div><div>--------------------------------------------------------------=
---------------------------------------------------------------------------=
---------------------------------------------------------------------------=
</div>
<div><br></div><div>3) The Place where I put data into log4net.ThreadContex=
t.Properties:</div><div><br></div><div>class MyInstatntiationClass</div><di=
v>=C2=A0 =C2=A0 {</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 log4net.ThreadConte=
xt.Properties[&quot;myguid&quot;] =3D Guid.NewGuid().ToString();</div>
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 log4net.ThreadContext.Properties[&quot;tid=
&quot;] =3D=C2=A0System.Threading.Thread.CurrentThread.ManagedThreadId.ToSt=
ring();</div><div>=C2=A0 =C2=A0 }</div><div><br></div><div><br></div><div>-=
---------------------------------------------------------------------------=
---------------------------------------------------------------------------=
--------------------------------------------------------------</div>
<div><br></div><div>4) My Web.config file:</div><div><br></div><div><br></d=
iv><div><br></div><div><div>&lt;appender name=3D&quot;RollingLocalFileAppen=
der&quot; type=3D&quot;log4net.Appender.RollingFileAppender&quot;&gt;</div>
<div>=C2=A0 =C2=A0 =C2=A0 &lt;file type=3D&quot;log4net.Util.PatternString&=
quot; value=3D&quot;C:\Logs\JSON.log&quot; /&gt;</div><div>=C2=A0 =C2=A0 =
=C2=A0 &lt;rollingStyle value=3D&quot;Date&quot; /&gt;</div><div>=C2=A0 =C2=
=A0 =C2=A0 &lt;datePattern value=3D&quot;yyyy-MM-dd&quot; /&gt;</div>
<div>=C2=A0 =C2=A0 =C2=A0 &lt;maxSizeRollBackups value=3D&quot;10&quot; /&g=
t;</div><div>=C2=A0 =C2=A0 =C2=A0 &lt;appendToFile value=3D&quot;true&quot;=
 /&gt;</div><div>=C2=A0 =C2=A0 =C2=A0 &lt;layout type=3D&quot;MyJsonLayout,=
 Version=3D1.0.0.0, Culture=3Dneutral&quot;&gt;</div>
<div>=C2=A0 =C2=A0 =C2=A0 &lt;/layout&gt;</div><div>=C2=A0 =C2=A0 &lt;/appe=
nder&gt;</div></div><div><br></div><div><br></div><div>--------------------=
---------------------------------------------------------------------------=
---------------------------------------------------------------------------=
------------------------------------------------------</div>
<div><br></div><div>5) Output file:</div><div><br></div><div><br></div><div=
>{&quot;@timestamp&quot;:&quot;2014-07-24T10:20:32.1223183-04:00&quot; ,&qu=
ot;@tid&quot;:&quot;5&quot;,&quot;@myguid&quot;:dfg134xcd_dfe-123uier00&quo=
t;}</div>
<div>{&quot;@timestamp&quot;:&quot;2014-07-24T10:20:32.3213382-04:00&quot;,=
&quot;@tid&quot;:&quot;<font color=3D"#ff0000">5</font>&quot;,&quot;@myguid=
&quot;:<font color=3D"#ff0000">dfg134xcd_dfe-123uier00</font>&quot;}<br></d=
iv>
<div>{&quot;@timestamp&quot;:&quot;2014-07-24T10:20:32.8273888-04:00&quot;,=
&quot;@tid&quot;:&quot;<font color=3D"#ff0000">5</font>&quot;,&quot;@myguid=
&quot;:<font color=3D"#ff0000">dfg134xcd_dfe-123uier00</font>&quot;}<br></d=
iv>
<div>{&quot;@timestamp&quot;:&quot;2014-07-24T10:20:32.8273888-04:00&quot;,=
&quot;@tid&quot;:&quot;<font color=3D"#000000">6</font>&quot;,&quot;@myguid=
&quot;:fgsg<font color=3D"#000000">4678xzv-adfry-2356i</font>&quot;}<br></d=
iv>
<div><br></div><div>=C2=A0<br></div><div>Expected behaviour:</div><div><br>=
</div><div>Each of my calls should result in unique guids. But as you can s=
ee I am getting stale guids.</div><div><br></div><div><br></div><div>------=
---------------------------------------------------------------------------=
---------------------------------------------------------------------------=
---------------------------------------------------------------------</div>
<div><br></div><div><br></div><div>I have two concerns :</div><div><br></di=
v><div>1) As you can see in the output file the guid are stale. While execu=
ting I carefully monitered the place where guid is being generated : in fil=
e number 3 in this file: MyInstatntiationClass.</div>
<div>All the generated guids were unique , however while logging I got stal=
e data. Also One other thing I noticed was ,<span style=3D"background-color=
:rgb(255,255,255)"> <font color=3D"#0000ff">when I put the current thread t=
o sleep for 50 ms , I see valid unique guids in the output.</font></span></=
div>
<div>I believe old thread data is being used.</div><div><br></div><div><br>=
</div><div>2) I did not understand the use of LoggingEventData. In file num=
ber 2 : MyJsonObject , If I dont make this call :<span style=3D"color:rgb(2=
55,0,0)">var lgData =3D loggingEvent.GetLoggingEventData(); </span><font co=
lor=3D"#000000">I get null values from loggingEvent.Properties.</font></div=
>
<div><font color=3D"#000000"><br></font></div><div><br></div><div><br></div=
><div><br></div><div>Thanks a lot for your help in advance ...</div><div><b=
r></div><div><br></div><div><br></div><div><br></div><div><br></div><div>
<br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>=
<br></div><div><br></div><div><br></div></div><div class=3D"gmail_extra"><b=
r><br><div class=3D"gmail_quote">On Thu, Jul 24, 2014 at 2:40 AM, Dominik P=
senner <span dir=3D"ltr">&lt;<a href=3D"mailto:dpsenner@gmail.com" target=
=3D"_blank">dpsenner@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div><div>Hi Ananth Tatacha=
r,<br><br></div>I&#39;m having a hard time understanding your problem. Can =
you provide us a sample application including all the code together with bo=
th a broken sample output and a expected sample output? It would also be in=
teresting which exact version of log4net you are using.<br>

<br>Best regards<br></div><br></div><div class=3D"gmail_extra"><br><br><div=
 class=3D"gmail_quote">2014-07-24 2:31 GMT+02:00 Ananth Tatachar <span dir=
=3D"ltr">&lt;<a href=3D"mailto:ananth.tatachar@gmail.com" target=3D"_blank"=
>ananth.tatachar@gmail.com</a>&gt;</span>:<div>
<div class=3D"h5"><br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div><div><div dir=3D"ltr"><br><br><div clas=
s=3D"gmail_quote">---------- Forwarded message ----------<br>
From: <b class=3D"gmail_sendername">Ananth Tatachar</b> <span dir=3D"ltr">&=
lt;<a href=3D"mailto:ananth.tatachar@gmail.com" target=3D"_blank">ananth.ta=
tachar@gmail.com</a>&gt;</span><br>
Date: Wed, Jul 23, 2014 at 8:24 PM<br>Subject: Log4net.ThreadContext.Proper=
ties Having stale data. How to resolve it?<br>To: <a href=3D"mailto:log4net=
-user@logging.apache.org" target=3D"_blank">log4net-user@logging.apache.org=
</a><br>

<br><br>
<div dir=3D"ltr"><div>I am using a RollingFileAppender , and my own custom =
layout. My application is multithreaded. Each thread will generate unique r=
andom data and is supposed to log it using log4net framework. However if I =
create multiple threads in quick succession I notice stale data in my logs =
, this goes away if each thread sleeps for 50 ms before logging. I am not a=
ble to figure out a solution to this issue or find its cause please do help=
 me.</div>



<div><br></div><div>My logging function looks like this:</div><div><br></di=
v><div><br></div><div>=C2=A0 =C2=A0 log4net.ThreadContext.properties[&quot;=
randomGeneratedData&quot;] =3D randomGeneratedData;</div><div>=C2=A0 =C2=A0=
 private ILog myLog =3D=C2=A0</div>



<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0LogManager.GetLogger(typeof(L=
ogTest));</div><div>=C2=A0 =C2=A0 using (log4net.NDC.Push(&quot;ndcTest1&qu=
ot;))</div><div>=C2=A0 =C2=A0 {</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 using=
 (log4net.NDC.Push(&quot;ndcTest2&quot;))</div><div>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 {</div>



<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 myLog.Info(&qu=
ot;myLogTest&quot;);</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 }<=
/div><div>=C2=A0 =C2=A0 }</div><div><br></div><div><br></div><div><br></div=
><div><br></div><div><br></div><div>Result of logging:</div><div><br></div>


<div>
=C2=A0 =C2=A0 =C2=A0 =C2=A0NDC =3D &quot;ndcTest1 ndcTest2&quot; , randomGe=
neratedData =3D rad1</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0NDC =3D &quot;ndc=
Test1 ndcTest2&quot; , randomGeneratedData =3D rad2</div><div>=C2=A0 =C2=A0=
 =C2=A0 =C2=A0NDC =3D &quot;&quot;, randomGeneratedData =3D rad2=C2=A0</div=
>



<div><br></div><div>and so on ...</div><div><br></div><div><br></div><div>I=
 tried to clear log4net.ThreadContext.Properties before filling it again , =
but it was of no use. Please help.=C2=A0</div></div>
</div><br></div>
</div></div></blockquote></div></div></div><span class=3D"HOEnZb"><font col=
or=3D"#888888"><br><br clear=3D"all"><br>-- <br><div dir=3D"ltr">Dominik Ps=
enner<br></div>
</font></span></div>
</blockquote></div><br></div>

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