Server freeze for 15 minutes after "One of the System Attendant's task is blocked." - Event ID: 1031 DSVPWM14C server has been freeze due to the below events. Event Type: Error Event Source: MSExchangeSA Event Category: General Event ID: 1031 Date: 2/3/2009 Time: 7:49:15 AM User: N/A Computer: DSVPWM14 Description: One of the System Attendant's task is blocked. Function: CPollDomainExchangeServersGroup::Work Windows Management Instrumentation (WMI) may stop responding while the Microsoft Exchange System Attendant service (Mad.exe) is tracking messages. When this problem occurs, Exchange System Attendant queues up the message-tracking entries and may eventually stop delivering e-mail. Event Type: Information Event Source: MSExchangeSA Event Category: General Event ID: 1032 Date: 2/3/2009 Time: 8:01:09 AM User: N/A Computer: DSVPWM14 Description: One of the System Attendant's task has recovered from a long delay. Function: CPollDomainExchangeServersGroup::Work System Attendant's task has been blocked in the server at 7:49:15 AM then it has recovered from a long delay at 8:01:09 AM.My question: This error will make the server to freeze? Reason: I see these in logs, after that server freeze for 15 mins then it has come back. Please suggest.=============================================================================================Hi Siva, This looks something different. ~ Start looking with Exchange Best Practice Analyzer and see if you get any errors related to this. ~ Are you running any file level anti-virus on Exchange server? If so, make sure that proper executions are set. This may occur because of that also... File-Level Antivirus Scanning on Exchange 2007 http://technet.microsoft.com/en-us/library/bb332342.aspx Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com============================================================================================= Thanks for your response Amit. I have already did the same. But nothing realted to this server freeze. Below is the Best Practice Analyzer result.ClusteredMailboxServer' is partially configured on server DSVPWM14.deluxe.com. Either setup is configuring it right now or setup failed while configuring it. Please rerun setup if it isn't currently running. Storage driver file 'c:\windows\system32\drivers\ql2300.sys' for 'QLogic Fibre Channel Adapter' on server DSVPWM14.deluxe.com is more than two years old. Check with your vendor to find out if a newer version is available. Installed driver details: 9.1.3.16 - 20061005092558.000000-300 Storage driver file 'c:\windows\system32\drivers\ql2300.sys' for 'QLogic Fibre Channel Adapter' on server DSVPWM14.deluxe.com is more than two years old. Check with your vendor to find out if a newer version is available. Installed driver details: 9.1.3.16 - 20061005092558.000000-300 The version of 'TCPIP.SYS' installed on server DSVPWM14.deluxe.com may cause connectivity issues in some networking configurations. If you are experiencing network connectivity issues with this server, please review the recommendations in Microsoft Knowledge Base article 950224. Installed version of 'TCPIP.SYS': 5.2.3790.4318 (srv03_sp2_gdr.080620-1216). Microsoft Filter Pack is not found on server DSVPWM14.deluxe.com. It is recommended that you install Microsoft Filter Pack on server DSVPWM14.deluxe.com so that Exchange Search can index and search Microsoft Office 2007 attachments. Logical disk P: on server DSVPWM14.deluxe.com has 1 GB of free space. As a best practice, the size of the 'Application' log on server DSVPWM14.deluxe.com should be increased. The current size is 5MB. For servers running Microsoft Exchange, a size of 40MB or more is recommended. Exchange fatal error information on server DSVPWM14.deluxe.com is not automatically sent to Microsoft for analysis. It is recommended that you enable this feature through the Exchange System Manager. All versions of Outlook are allowed to access server DSVPWM14.deluxe.com. It is recommended that older versions be blocked. Except red colored fonts, all other issues are commonly seen in rest of the servers in our environment.Thanks=============================================================================================Hi Siva, How about antivirus execlusion? You can also disable antivirus or any third party security or scanning software on the server temporary to see if it is being created by it. I would also suggest you to create a new thread for this problem to get more responses and mention your all observation in it. Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com=============================================================================================Thanks for your response Amit - But I would like to add add-on point that, this issue has happend only once. Not frequently. I can able to agree, your antivirus exclusion - if it happning frequently. Let me put this issue on hold for now. In future, if it happen again then I can try that your suggestion. Have a good day.!Others -Please suggest.Thanks/ SivaFunnyghost

Kewl, let us know the result if this happens again and you disable the antivirus/third-party services.Filling loophole if anybody wants to see full discussion on this, previous thread is here...http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/8a367b72-0b0e-4070-9000-0e065edd33e8Thanks,Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com