A process serving application pool 'DefaultAppPool' suffered a fatal communication error with the Windows Process Activation Service


  • Dear Experts,

    We are running Windows Server 2008 and SQL Server 2008. The website works properly as long as the internal functions are concerned, however whenever there is any function involved which communicates with the external server, we receive following error:


    Log Name:      System
    Source:        Microsoft-Windows-WAS
    Date:          12/27/2010 12:15:36 PM
    Event ID:      5011
    Task Category: None
    Level:         Warning
    Keywords:      Classic
    User:          N/A
    Computer:      WIN-4864693DQZ7
    A process serving application pool 'DefaultAppPool' suffered a fatal communication error with the Windows Process Activation Service. The process id was '2780'. The data field contains the error number.
    Event Xml:
    <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
        <Provider Name="Microsoft-Windows-WAS" Guid="{524B5D04-133C-4A62-8362-64E8EDB9CE40}" EventSourceName="WAS" />
        <EventID Qualifiers="32768">5011</EventID>
        <TimeCreated SystemTime="2010-12-27T07:15:36.000Z" />
        <Correlation />
        <Execution ProcessID="0" ThreadID="0" />
        <Security />
        <Data Name="AppPoolID">DefaultAppPool</Data>
        <Data Name="ProcessID">2780</Data>


    The list of all the services is as follows:

    Status   Name               DisplayName                          
    ------   ----               -----------                          
    Running  AeLookupSvc        Application Experience               
    Stopped  ALG                Application Layer Gateway Service    
    Running  AppHostSvc         Application Host Helper Service      
    Running  Appinfo            Application Information              
    Stopped  AppMgmt            Application Management               
    Running  aspnet_state       ASP.NET State Service                
    Stopped  AudioEndpointBu... Windows Audio Endpoint Builder       
    Stopped  Audiosrv           Windows Audio                        
    Running  BFE                Base Filtering Engine                
    Running  BITS               Background Intelligent Transfer Ser...
    Stopped  Browser            Computer Browser                     
    Running  CertPropSvc        Certificate Propagation              
    Stopped  clr_optimizatio... Microsoft .NET Framework NGEN v2.0....
    Running  COMSysApp          COM+ System Application              
    Running  CryptSvc           Cryptographic Services               
    Stopped  CscService         Offline Files                        
    Running  DcomLaunch         DCOM Server Process Launcher         
    Running  Dhcp               DHCP Client                          
    Running  Dnscache           DNS Client                           
    Stopped  dot3svc            Wired AutoConfig                     
    Running  DPS                Diagnostic Policy Service            
    Stopped  EapHost            Extensible Authentication Protocol   
    Running  EventLog           Windows Event Log                    
    Running  EventSystem        COM+ Event System                    
    Stopped  FCRegSvc           Microsoft Fibre Channel Platform Re...
    Running  fdPHost            Function Discovery Provider Host     
    Running  FDResPub           Function Discovery Resource Publica...
    Stopped  FontCache3.0.0.0   Windows Presentation Foundation Fon...
    Running  gpsvc              Group Policy Client                  
    Stopped  hidserv            Human Interface Device Access        
    Stopped  hkmsvc             Health Key and Certificate Management
    Stopped  idsvc              Windows CardSpace                    
    Running  IISADMIN           IIS Admin Service                    
    Running  IKEEXT             IKE and AuthIP IPsec Keying Modules  
    Stopped  IPBusEnum          PnP-X IP Bus Enumerator              
    Running  iphlpsvc           IP Helper                            
    Stopped  KeyIso             CNG Key Isolation                    
    Running  KtmRm              KtmRm for Distributed Transaction C...
    Running  LanmanServer       Server                               
    Running  LanmanWorkstation  Workstation                          
    Stopped  lltdsvc            Link-Layer Topology Discovery Mapper 
    Running  lmhosts            TCP/IP NetBIOS Helper                
    Stopped  MMCSS              Multimedia Class Scheduler           
    Running  MpsSvc             Windows Firewall                     
    Running  MSDTC              Distributed Transaction Coordinator  
    Running  MsDtsServer100     SQL Server Integration Services 10.0 
    Stopped  MSiSCSI            Microsoft iSCSI Initiator Service    
    Stopped  msiserver          Windows Installer                    
    Running  MSMQ               Message Queuing                      
    Running  MSSQLFDLauncher    SQL Full-text Filter Daemon Launche...
    Running  MSSQLSERVER        SQL Server (MSSQLSERVER)             
    Stopped  MSSQLServerADHe... SQL Active Directory Helper Service  
    Running  MSSQLServerOLAP... SQL Server Analysis Services (MSSQL...
    Stopped  msvsmon80          Visual Studio 2005 Remote Debugger   
    Stopped  napagent           Network Access Protection Agent      
    Stopped  Netlogon           Netlogon                             
    Running  Netman             Network Connections                  
    Running  NetMsmqActivator   Net.Msmq Listener Adapter            
    Running  NetPipeActivator   Net.Pipe Listener Adapter            
    Running  netprofm           Network List Service                 
    Running  NetTcpActivator    Net.Tcp Listener Adapter             
    Running  NetTcpPortSharing  Net.Tcp Port Sharing Service         
    Running  NlaSvc             Network Location Awareness           
    Running  nsi                Network Store Interface Service      
    Stopped  pla                Performance Logs & Alerts            
    Running  PlugPlay           Plug and Play                        
    Running  PolicyAgent        IPsec Policy Agent                   
    Running  ProfSvc            User Profile Service                 
    Stopped  ProtectedStorage   Protected Storage                    
    Stopped  RasAuto            Remote Access Auto Connection Manager
    Running  RasMan             Remote Access Connection Manager     
    Stopped  RemoteAccess       Routing and Remote Access            
    Running  RemoteRegistry     Remote Registry                      
    Running  ReportServer       SQL Server Reporting Services (MSSQ...
    Stopped  RpcLocator         Remote Procedure Call (RPC) Locator  
    Running  RpcSs              Remote Procedure Call (RPC)          
    Stopped  RSoPProv           Resultant Set of Policy Provider     
    Running  sacsvr             Special Administration Console Helper
    Running  SamSs              Security Accounts Manager            
    Stopped  SCardSvr           Smart Card                           
    Running  Schedule           Task Scheduler                       
    Stopped  SCPolicySvc        Smart Card Removal Policy            
    Running  seclogon           Secondary Logon                      
    Running  SENS               System Event Notification Service    
    Running  SessionEnv         Terminal Services Configuration      
    Stopped  SharedAccess       Internet Connection Sharing (ICS)    
    Running  ShellHWDetection   Shell Hardware Detection             
    Running  slsvc              Software Licensing                   
    Running  SLUINotify         SL UI Notification Service           
    Stopped  SNMPTRAP           SNMP Trap                            
    Running  Spooler            Print Spooler                        
    Stopped  SQLBrowser         SQL Server Browser                   
    Running  SQLSERVERAGENT     SQL Server Agent (MSSQLSERVER)       
    Running  SQLWriter          SQL Server VSS Writer                
    Stopped  SSDPSRV            SSDP Discovery                       
    Running  SstpSvc            Secure Socket Tunneling Protocol Se...
    Stopped  swprv              Microsoft Software Shadow Copy Prov...
    Stopped  SysMain            Superfetch                           
    Running  TapiSrv            Telephony                            
    Stopped  TBS                TPM Base Services                    
    Running  TermService        Terminal Services                    
    Stopped  Themes             Themes                               
    Stopped  THREADORDER        Thread Ordering Server               
    Running  TrkWks             Distributed Link Tracking Client     
    Running  TrustedInstaller   Windows Modules Installer            
    Stopped  UI0Detect          Interactive Services Detection       
    Running  UmRdpService       Terminal Services UserMode Port Red...
    Stopped  upnphost           UPnP Device Host                     
    Running  UxSms              Desktop Window Manager Session Manager
    Stopped  vds                Virtual Disk                         
    Stopped  VSS                Volume Shadow Copy                   
    Running  W32Time            Windows Time                         
    Running  W3SVC              World Wide Web Publishing Service    
    Running  WAS                Windows Process Activation Service   
    Stopped  WcsPlugInService   Windows Color System                 
    Stopped  WdiServiceHost     Diagnostic Service Host              
    Running  WdiSystemHost      Diagnostic System Host               
    Stopped  Wecsvc             Windows Event Collector              
    Stopped  wercplsupport      Problem Reports and Solutions Contr...
    Running  WerSvc             Windows Error Reporting Service      
    Running  WinHttpAutoProx... WinHTTP Web Proxy Auto-Discovery Se...
    Running  Winmgmt            Windows Management Instrumentation   
    Running  WinRM              Windows Remote Management (WS-Manag...
    Stopped  wmiApSrv           WMI Performance Adapter              
    Stopped  WPDBusEnum         Portable Device Enumerator Service   
    Running  wuauserv           Windows Update                       
    Stopped  wudfsvc            Windows Driver Foundation - User-mo...

    I am a new-by in this so i am in need of some desperate help!



    Monday, December 27, 2010 7:41 AM