vb.net - WCF transaction in different threads -


a client application calling wcf-service in 1 transactionscope, in hopes of rolling entire transaction if call fails. application & service works fine if 2 clients send @ same time request wcf-service, 1 of clients gets deadlock error.

this code in client application:

 using transcop new transactionscope(transactionscopeoption.required, new transactionoptions() {.isolationlevel = isolationlevel.serializable})         try             dim test = leapros.rechnungenservice.rechnungeninternalwsclient.facadepdfverarbeitunginternalws.pdfverarbeitungloslegen(11928, true)              transcop.complete()          catch ex exception             transcop.dispose()             throw         end try     end using  public shared function pdfverarbeitungloslegen(idausgeplanterechnungen integer, lettershopdrucken boolean) byte()      dim client rechnunginternalwsclient = nothing      try         ' verbindung zum webservice initialiseren.         client = new rechnunginternalwsclient("nettcpbinding_irechnunginternalws")         client.open()          ' verarbeitung starten         dim retval = client.pdfverarbeitungloslegen(idausgeplanterechnungen:=idausgeplanterechnungen, lettershopdrucken:=lettershopdrucken)         client.close()         client = nothing          'pdf zurückgeben.         return retval.pdf      catch ex exception         rechnungenutils.clientkontrolliertbeenden(client)         throw     end try  end function

this service contract:

<servicebehavior(concurrencymode:=concurrencymode.multiple, instancecontextmode:=instancecontextmode.percall, usesynchronizationcontext:=true, transactionisolationlevel:=system.transactions.isolationlevel.serializable, transactiontimeout:="00:00:30", releaseserviceinstanceontransactioncomplete:=false )> public class rechnunginternalws implements irechnunginternalws  <operationbehavior(transactionscoperequired:=true,  transactionautocomplete:=true)> public function pdfverarbeitungloslegen(idausgeplanterechnungen integer,  lettershopdrucken boolean) rechnungpdforiginal implements  irechnunginternalws.pdfverarbeitungloslegen ' end function

these configuration files:

<endpoint address="net.tcp://eldienste:555/irechnunginternalws" binding="nettcpbinding" bindingconfiguration="nettcpbinding_irechnunginternalws" contract="servicereference.irechnunginternalws" name="nettcpbinding_irechnunginternalws" />  <binding name="nettcpbinding_irechnunginternalws" closetimeout="00:01:00"       opentimeout="00:01:00" receivetimeout="00:01:00" sendtimeout="00:01:00"       transactionflow="true" transfermode="buffered" transactionprotocol="oletransactions"       hostnamecomparisonmode="strongwildcard" listenbacklog="250"       maxbufferpoolsize="524288" maxbuffersize="65536" maxconnections="250"       maxreceivedmessagesize="65536">   <readerquotas maxdepth="32" maxstringcontentlength="8192" maxarraylength="2147483646"       maxbytesperread="4096" maxnametablecharcount="16384" />   <reliablesession ordered="true" inactivitytimeout="00:10:00"       enabled="false" />   <security mode="none">     <transport clientcredentialtype="windows" protectionlevel="encryptandsign" />     <message clientcredentialtype="windows" />   </security> </binding>

what doing wrong?

i found right configuration. service contract must configured follows:

  • the concurrenymode property of servicebehavior attribute must assigned following concurrencymode.multiple value.
  • the transactionautocomplete property of operationbehavior attribute must true operations. transactions can not span multiple operations.
  • the releaseserviceinstanceontransactioncomplete property of servicebehavior attribute service must set false. must explicitly release service instance closing connection client.

  • the transactionautocompleteonsessionclose property of servicebehavior attribute service must true. transactions in threads must terminated when session ends.

    <servicebehavior(concurrencymode:=concurrencymode.multiple, instancecontextmode:=instancecontextmode.persession, usesynchronizationcontext:=false,transactionisolationlevel:=system.transactions.isolationlevel.serializable, transactiontimeout:="00:00:30", releaseserviceinstanceontransactioncomplete:=false, transactionautocompleteonsessionclose:=true )> public class rechnunginternalws implements irechnunginternalws   <operationbehavior(transactionscoperequired:=true,  transactionautocomplete:=true)> public function pdfverarbeitungloslegen(idausgeplanterechnungen  integer, lettershopdrucken boolean) rechnungpdforiginal implements  irechnunginternalws.pdfverarbeitungloslegen  ' end function  end class

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