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2020-07-19T16:09:47Z
<p>Text replacement - "[[File:../gfx/" to "[[File:"</p>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>x86: [[File:<del style="font-weight: bold; text-decoration: none;">../gfx/</del>download.gif|[GRAPHIC: Download]]][http://www.microsoft.com/downloads/release.asp?ReleaseID=25443 Download Q248838engi.exe now]<br /></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>x86: [[File:download.gif|[GRAPHIC: Download]]][http://www.microsoft.com/downloads/release.asp?ReleaseID=25443 Download Q248838engi.exe now]<br /></div></td></tr>
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2020-07-18T16:14:30Z
<p>importing KB archive</p>
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= <span id="KB249148"></span>XADM: Handles Leak During Online Backup =<br />
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Article ID: 249148<br />
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Article Last Modified on 10/26/2006<br />
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APPLIES TO<br /><br />
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* Microsoft Exchange Server 5.5 Service Pack 3<br />
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This article was previously published under Q249148<br />
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== SYMPTOMS ==<br />
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If you monitor the Exchange Server computer by using Performance Monitor, you find that many handles leaked after an online backup.<br />
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== CAUSE ==<br />
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Several registry keys are opened during an online backup. Some of them come from the Mdbrest.dll file. After the query, the keys are not closed. They remain open for later use for performance reasons. But if the Mdbrest.dll has been relocated because of a memory address collision, those keys are not closed. They are reopened, and the previous handles leak when they are queried again.<br />
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== RESOLUTION ==<br />
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To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:<br />
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[[../191014|191014]] XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack<br />
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The following files are available for download from the Microsoft Download Center:<br /><br />
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x86: [[File:../gfx/download.gif|[GRAPHIC: Download]]][http://www.microsoft.com/downloads/release.asp?ReleaseID=25443 Download Q248838engi.exe now]<br /><br />
Alpha: [[File:../gfx/download.gif|[GRAPHIC: Download]]][http://www.microsoft.com/downloads/release.asp?ReleaseID=25444 Download Q248838enga.exe now]<br />
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For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:<br />
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[[../119591|119591]] How to Obtain Microsoft Support Files from Online Services<br />
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Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.<br />
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== STATUS ==<br />
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Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.<br />
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== MORE INFORMATION ==<br />
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If you use CDB to attach to the Mad.exe file, the following information is displayed:<br />
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LDR: Automatic DLL relocation in Mad.exe<br /><br />
LDR: Dll mdbrest.dll base 004b0000 relocated due to collision with Dynamically Allocated Memory<br /><br />
CDB ModLoad: 0b950000 0b982000 Mdbrest.dll<br /><br />
CDB ModLoad: 6fcc0000 6fcd4000 C:\Exchsrvr\Bin\Netif.dll<br /><br />
CDB ModLoad: 6fcb0000 6fcb8000 C:\Exchsrvr\Bin\Isatq.dll<br /><br />
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If you use the Oh.exe file to check the handles that are held by the Mad.exe file, you find that the leaked handles are from the following key:<br />
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'''HKEY_LOCAL_MACHINE\SYSTEM\CCS\Service\MSExchangeIS\ParametersPrivate'''<br />
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The fix closes all such keys when the .dll file is detached.<br />
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Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbgraphxlinkcritical kbqfe KB249148<br />
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[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]<br />
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<span>© Microsoft Corporation. All rights reserved.</span><br />
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