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Title
System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown with MAGE (Migration Agent for Exchange) -
Description
Certain Mailboxes are failing to sync with the following errors and the MAGE Agent stops processing the other mailboxes associated with the Agent until it is restarted:
2017-11-01 16:34:56.8004 Px273C TxF A87 C74 M6107 Error System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.at System.Text.StringBuilder.set_Length(Int32 value)at System.Xml.XmlTextReaderImpl.ParseText()at System.Xml.XmlTextReaderImpl.ParseElementContent()at System.Xml.XmlTextReaderImpl.Read()at System.Xml.XmlTextReader.Read()at System.Xml.XmlCharCheckingReader.Read()at System.Xml.ReadContentAsBinaryHelper.InitOnElement()at System.Xml.ReadContentAsBinaryHelper.ReadElementContentAsBase64(Byte[] buffer, Int32 index, Int32 count)at System.Xml.XmlCharCheckingReader.ReadElementContentAsBase64(Byte[] buffer, Int32 index, Int32 count)at Microsoft.Exchange.WebServices.Data.EwsXmlReader.ReadBase64ElementValue()at Microsoft.Exchange.WebServices.Data.ExportItemsResponse.ReadElementsFromXml(EwsServiceXmlReader reader)at Microsoft.Exchange.WebServices.Data.ServiceResponse.LoadFromXml(EwsServiceXmlReader reader, String xmlElementName)at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.ParseResponse(EwsServiceXmlReader reader)at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ParseResponse(EwsServiceXmlReader reader, WebHeaderCollection responseHeaders)at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ReadResponse(EwsServiceXmlReader ewsXmlReader, WebHeaderCollection responseHeaders)at Microsoft.Exchange.WebServices.Data.SimpleServiceRequestBase.ReadResponseXml(Stream responseStream, WebHeaderCollection responseHeaders)at Microsoft.Exchange.WebServices.Data.SimpleServiceRequestBase.ReadResponse(IEwsHttpWebResponse response)at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute()at Microsoft.Exchange.WebServices.Data.ExchangeService.ExportItems(IEnumerable`1 itemIds)at Quest.MigrationManager.Exchange.MigrationConnectors.Ews.ProductionExchangeService.ExportItems(IEnumerable`1 itemIds)at Quest.MigrationManager.Exchange.MigrationConnectors.Ews.EwsSyncConnector.DoExportItems(IEnumerable`1 itemsToExport)at Quest.MigrationManager.Exchange.MigrationConnectors.Ews.EwsSyncConnector.<ExportOneByOne>d__96.MoveNext()at Quest.MigrationManager.Exchange.MigrationConnectors.Ews.EwsSyncConnector.<GetItemsPortion>d__105.MoveNext()at Quest.MigrationManager.Exchange.MigrationConnectors.Ews.EwsSyncConnector.<GetItems>d__99.MoveNext()at Quest.MigrationManager.Exchange.MigrationConnectors.GenericSyncConnector.ProcessChangedItemsCache(IFolderPair folderPair)at Quest.MigrationManager.Exchange.MigrationConnectors.GenericSyncConnector.SyncFolderItems(IFolderPair folderPair, SyncDirection syncDirection)2017-11-01 16:36:53.3028 Px273C TxB A87 C- M- Trace We have exceeded the memory consumption threshold, waiting for free memory. -
Cause
There is at least one excessively large item in the mailbox reporting the error. In the MAGE.log, you will see the folder that contains the message(s) that are causing this error. -
Resolution
Locate the large message(s) in the affected mailbox and export and delete the message. If the Synchronization scope includes Deleted Items, the large message(s) must also be removed from Recover Deleted Items. -
Additional Information
A script, similar to below, can be used to query for all large messages in all mailboxes: Get-Mailbox -ResultSize Unlimited | Get-MailboxFolderStatistics -IncludeAnalysis -FolderScope All | Where-Object {(($_.TopSubjectSize -Match "MB") -and ($_.TopSubjectSize -GE 50.0)) -or ($_.TopSubjectSize -Match "GB")} | Select-Object Identity, TopSubject, TopSubjectSize | Export-CSV -path "C:\report.csv" -notype