IIS on Node App Pools are stopping HTTP Error 503 RRS feed

  • Question

  • User1415686117 posted

    Windows 2012 R2

    IIS 6.2 build 9200

    Web Farm 2 Nodes

    Both Nodes are VM's on VMware 6.5 ESXI hosts

    The are balanced using Kemp Load Balancer.

    I use DFSR to replicate the IIS  Web Content and the IIS Config

    On Node 1 3 Application Pools stop




    I get  Http error 503 service not available   when trying to access the site on NODE 1  NODE 2 is still working great.

    The Music site is internet facing the VeeamBackup is internal only.

    the three App Pools stop randomly or when trying to be accessed.

    Since Node 2 is Good is there a way I can copied over from Node 2 to node 1

    Or is there any thing I can do to get NODE 1 back online

    This all happened after a NAS device crashed and I lost my SQL Servers had to rebuild them .

    All databases are back online.

    Any ideas would be helpful

    Thank you


    Saturday, October 5, 2019 2:27 AM

All replies

  • User-460007017 posted

    Hi trgrassijr69,

    You should be able to find error message in application and system event log. Could you reproduce this issue post these error messages?

    I haven't used VMware but I am more familiar with Hyper-V. If VMware support VHDX, you could backup the whole server node 2 then install it on node 1 with  https://docs.microsoft.com/en-us/sysinternals/downloads/disk2vhd

    Best Regards,

    Jokies Ding

    Monday, October 7, 2019 2:21 AM
  • User1415686117 posted


    thank you for responding

    Log Name:      Application
    Source:        Microsoft-Windows-IIS-W3SVC-WP
    Date:          10/7/2019 12:48:20
    Event ID:      2280
    Task Category: None
    Level:         Error
    Keywords:      Classic
    User:          N/A
    Computer:      TGCS013-N1.our.network.tgcsnet.com
    The Module DLL C:\Windows\System32\inetsrv\iiswsock.dll failed to load.  The data is the error.
    Event Xml:
    <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
        <Provider Name="Microsoft-Windows-IIS-W3SVC-WP" Guid="{670080D9-742A-4187-8D16-41143D1290BD}" EventSourceName="W3SVC-WP" />
        <EventID Qualifiers="49152">2280</EventID>
        <TimeCreated SystemTime="2019-10-07T16:48:20.000000000Z" />
        <Correlation />
        <Execution ProcessID="0" ThreadID="0" />
        <Security />
        <Data Name="ModuleDll">C:\Windows\System32\inetsrv\iiswsock.dll</Data>

    this event over  and over again

    Monday, October 7, 2019 6:07 PM
  • User-460007017 posted

    Hi trgrassijr69,

    iiswsock.dll belong to IIS/world wide web service/WebSocket Protocol. Please go to C:\Windows\System32\inetsrv to compare the dll in server A and Server B. I think this file could probably has been corrupted. Try to copy this file from node 2 or reinstall it from server manager.

    Use process monitor would help you pinpoint the problem


    Best Regards,

    Jokies Ding

    Thursday, October 10, 2019 6:19 AM