Hi,

I am using DMCC .net API to collect the call details and agentstate information, as call traffic increased i got ServerConnectionDownEvent
with Reason : Error on Socket during write attempt, socket to server has been closed! and application stop working.

After a further investigation on this i get to know this happens because of the TCP receive buffer full and AES host enable to send data to client (Win0 error).

Is there any way to set the buffer limit at client side, or in API so data congestion on TCP buffer can be avoid.

Thanks

I take it that it is the receive buffer on the Client that is filling. Correct?

This is almost always due to the application not removing events from the input queue quickly enough. This happens when that application uses the event notification thread to process events. It is important to do as little processing as possible in the event callback. You should do no more here than receive the event and place it on an internal queue. Your application can then monitor this queue and process events using one or more worker threads.

Martin

Hi Martin,

Thanks for replay

I am not doing any heavy processing in the event it just write into a file and exit.

I found one document "http://downloads.avaya.com/css/P8/documents/100128949" (page 8) last point which says In DMCC .net SDK they introduce one property which allow developer to adjust tcp receive buffer. What is that property and how to set that property?

Thanks for your quick reply

Are you doing a blocking or non-blocking write? Synchronous file output is one of the most time-consuming things you can do on a computer.

I have not come across anything that looks like the feature described in that document. I will ask the product house about it and let you know. However, increasing buffers is rarely a solution to slow message processing.

Martin

Create a simple text file called DMCC.Properties and place it in \Windows\System32.
The file should look like this (I set my receive buffer to 2MEG):

# SDK Configuration Properties
# TCP Receive Buffer Size in KBytes
# For example:
# 512 for 512 KB
# 1024 for 1024 KB (1MB)
#
tcp.receive.buffer.size=2048

Also you can turn on SDK Trace Logging (which will show you the value of your buffer) by installing a file DMCC.config into system32 as well. This file is a little more involved but I listed it below. Look for \share\logs\:

<?xml version="1.0" encoding="utf-8" ?>
<!--
.NET application configuration file
This file is used for configuring the DMCC .NET logging capabilities.
It MUST have the name DMCC.config and reside in the same folder as your application.
-->
<!-- You should NOT change the following unless you really know what you are doing.
To turn on or off logging go to the bottom of file and look for "END OF DO NOT CHANGE".
There you will see information about hot to turn on and off the different logs

START OF DO NOT CHANGE -->
<configuration>
<!-- Register a section handler for the log4net section -->
<configSections>
<section name="log4net" type="System.Configuration.IgnoreSectionHandler" />
</configSections>
<appSettings>
<!-- To enable internal log4net logging specify the following appSettings key -->
<!-- <add key="log4net.Internal.Debug" value="true"/> -->
</appSettings>
<!-- This section contains the log4net configuration settings -->
<log4net>
<!-- Define some output appenders -->
<appender name="RollingLogFileAppender" type="DMCC_log4net.Appender.RollingFileAppender">
<file value="\\[SERVER-NAME]\Share\Logs\DMCC-SDK-Log.txt" />
<!-- <file value="log-file.txt" /> -->
<appendToFile value="true" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="40MB" />
<rollingStyle value="Size" />
<staticLogFileName value="true" />
<!-- Minimal locking model to allow multiple process to write to the same file -->
<lockingModel type="DMCC_log4net.Appender.FileAppender+MinimalLock" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<header value="[Header] " />
<footer value="[Footer] " />
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
<appender name="LogFileAppender" type="DMCC_log4net.Appender.FileAppender">
<file value="log-file.txt" />
<!-- Example using environment variables in params -->
<!-- <file value="${TMP}\log-file.txt" /> -->
<appendToFile value="true" />
<!-- An alternate output encoding can be specified -->
<!-- <encoding value="unicodeFFFE" /> -->
<layout type="DMCC_log4net.Layout.PatternLayout">
<header value="[Header] " />
<footer value="[Footer] " />
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
<!-- Alternate layout using XML
<layout type="DMCC_log4net.Layout.XMLLayout" /> -->
</appender>
<appender name="ConsoleAppender" type="DMCC_log4net.Appender.ConsoleAppender">
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
<appender name="NetSendAppender" type="DMCC_log4net.Appender.NetSendAppender">
<threshold value="ERROR" />
<server value="SQUARE" />
<recipient value="nicko" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] - %message%newline" />
</layout>
</appender>
<!-- Example of how to configure the AdoNetAppender
<appender name="AdoNetAppender" type="DMCC_log4net.Appender.AdoNetAppender" >
<connectionString value="Driver={Microsoft Access Driver (*.mdb)};DBQ=C:\Work\cvs_root\log4net-1.2\access.mdb;UID=;PWD=;" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES ('%date','%thread','%level','%logger','%message')" />
</layout>
</appender>
-->
<!--
<appender name="A" type="DMCC_log4net.Appender.ForwardingAppender" >
<threshold value="WARN"/>
<appender-ref ref="ConsoleAppender" />
</appender>
<appender name="B" type="DMCC_log4net.Appender.ForwardingAppender" >
<filter type="DMCC_log4net.Filter.LevelRangeFilter">
<levelMin value="DEBUG"/>
<levelMax value="INFO"/>
</filter>
<appender-ref ref="ConsoleAppender" />
</appender>
-->
<!-- Example of how to configure the AdoNetAppender to connect to MS Access -->
<appender name="ADONetAppender_Access" type="DMCC_log4net.Appender.AdoNetAppender">
<connectionString value="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Work\cvs_root\log4net-1.2\access.mdb;User Id=;Password=;" />
<commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)" />
<parameter>
<parameterName value="@log_date" />
<dbType value="String" />
<size value="255" />
<layout type="DMCC_log4net.Layout.PatternLayout"/>
<conversionPattern value="%date" />

</parameter>
<parameter>
<parameterName value="@thread" />
<dbType value="String" />
<size value="255" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%thread" />
</layout>
</parameter>
<parameter>
<parameterName value="@log_level" />
<dbType value="String" />
<size value="50" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%level" />
</layout>
</parameter>
<parameter>
<parameterName value="@logger" />
<dbType value="String" />
<size value="255" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%logger" />
</layout>
</parameter>
<parameter>
<parameterName value="@message" />
<dbType value="String" />
<size value="1024" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%message" />
</layout>
</parameter>
</appender>
<!-- Example of how to configure the AdoNetAppender to connect to MS SQL Server -->
<appender name="ADONetAppender_SqlServer" type="DMCC_log4net.Appender.AdoNetAppender">
<bufferSize value="1" />
<connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<connectionString value="data source=SQLSVR;initial catalog=test_log4net;integrated security=false;persist security info=True;User ID=sa;Password=sa" />
<commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)" />
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<!--
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%date{yyyy'-'MM'-'dd HH':'mm':'ss'.'fff}" />
</layout>
-->
<layout type="DMCC_log4net.Layout.RawTimeStampLayout" />
</parameter>
<parameter>
<parameterName value="@thread" />
<dbType value="String" />
<size value="255" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%thread" />
</layout>
</parameter>
<parameter>
<parameterName value="@log_level" />
<dbType value="String" />
<size value="50" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%level" />
</layout>
</parameter>
<parameter>
<parameterName value="@logger" />
<dbType value="String" />
<size value="255" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%logger" />
</layout>
</parameter>
<parameter>
<parameterName value="@message" />
<dbType value="String" />
<size value="4000" />
<layout type="DMCC_log4net.Layout.PatternLayout">
<conversionPattern value="%message" />
</layout>
</parameter>
</appender>
<!-- Setup the root category, add the appenders and set the default level -->
<root>
<level value="INFO" />
<appender-ref ref="RollingLogFileAppender" />
<appender-ref ref="ConsoleAppender" />
<!-- <appender-ref ref="ADONetAppender_SqlServer" /> -->
<!-- <appender-ref ref="NetSendAppender" /> -->
<!-- <appender-ref ref="A" /> -->
</root>
<!-- END OF DO NOT CHANGE -->
<!-- HERE IS WHERE YOU ADJUST THE LEVELS FOR LOGGING -->
<!-- Specify the level for some specific categories -->
<!--- The Avaya.ApplicationEnablement.DMCC.ServiceProvider logger is used for logging error and exceptions which have occured in the DMCC .NET API -->
<!-- logger name="Avaya.ApplicationEnablement.DMCC.ServiceProvider" -->
<logger name="DMCC">
<!-- <appender-ref ref="B" /> -->
<level value="DEBUG" />
<!--
<appender-ref ref="RollingLogFileAppender" />
<appender-ref ref="ConsoleAppender" />
-->
</logger>
<!--- The XML logger is used for logging all incoming and outgoing XML messages. The level for the XML messages is INFO.
If you want to log all XML messages going to and from your application change the level from OFF to INFO.
-->
<logger name="XML">
<!-- <appender-ref ref="B" /> -->
<level value="INFO" />
<!--
<appender-ref ref="RollingLogFileAppender" />
<appender-ref ref="ConsoleAppender" />
-->
</logger>
<!--- The AUTOMATED TESTER logger is used for logging Automated testing status in the dashboard. -->
<logger name="AUTOMATED_TESTING">
<!-- <appender-ref ref="B" /> -->
<level value="DEBUG" />
<!--
<appender-ref ref="RollingLogFileAppender" />
<appender-ref ref="ConsoleAppender" />
-->
</logger>
</log4net>
</configuration>

Thanks Dan,

I hadn't come across that before.

Martin