Writing to multiple PackagePart streams causes deadlock. Is this fixed? kb951731

We are trying to use OpenXML to create Excel spreadsheets from a database and we are running into this documented problem (kb951731) when excels are above a certain size.
What is the status of this bug? Is it fixed in a later version of .net? We are using .net 4.5
Are there any ways to work around it when using OpenXML?
James.

We can not use the work around because the bug is in OpenXML, not in our code.
OpenXML when called under .net45 uses isolated storage if file size is greater than 10MB. This is not thread safe as documented in Microsoft kb 951731. When OpenXML hits an uncompressed file size greater than 10MB it jumps into using isolated
storage. If you have two processes going on at the same time then you are dead in the water with this. Worst of all it does not easily recover from this; the next single file greater than 10mb will also fail.
As I mention above EPPlus guys have identified this issue and fixed it. It is a current problem in OpenXML
The stack trace if you hit this problem is below:
System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, IsolatedStorageFile isf)
   at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, IsolatedStorageFile isf)
   at MS.Internal.IO.Packaging.PackagingUtilities.SafeIsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, ReliableIsolatedStorageFileFolder folder)
   at MS.Internal.IO.Packaging.PackagingUtilities.CreateUserScopedIsolatedStorageFileStreamWithRandomName(Int32 retryCount, String& fileName)
   at MS.Internal.IO.Packaging.SparseMemoryStream.EnsureIsolatedStoreStream()
   at MS.Internal.IO.Packaging.SparseMemoryStream.SwitchModeIfNecessary()
   at MS.Internal.IO.Packaging.CompressEmulationStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at MS.Internal.IO.Packaging.CompressStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at MS.Internal.IO.Zip.ProgressiveCrcCalculatingStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Write(Byte[] buffer, Int32 offset, Int32 count)
   at System.Xml.XmlUtf8RawTextWriter.FlushBuffer()
   at System.Xml.XmlUtf8RawTextWriter.RawText(Char* pSrcBegin, Char* pSrcEnd)
   at System.Xml.XmlUtf8RawTextWriter.WriteStartElement(String prefix, String localName, String ns)
   at System.Xml.XmlWellFormedWriter.WriteStartElement(String prefix, String localName, String ns)
   at DocumentFormat.OpenXml.OpenXmlElement.WriteTo(XmlWriter xmlWriter)
   at DocumentFormat.OpenXml.OpenXmlCompositeElement.WriteContentTo(XmlWriter w)
   at DocumentFormat.OpenXml.OpenXmlElement.WriteTo(XmlWriter xmlWriter)
   at DocumentFormat.OpenXml.OpenXmlCompositeElement.WriteContentTo(XmlWriter w)
   at DocumentFormat.OpenXml.OpenXmlElement.WriteTo(XmlWriter xmlWriter)
   at DocumentFormat.OpenXml.OpenXmlCompositeElement.WriteContentTo(XmlWriter w)
   at DocumentFormat.OpenXml.OpenXmlElement.WriteTo(XmlWriter xmlWriter)
   at DocumentFormat.OpenXml.OpenXmlCompositeElement.WriteContentTo(XmlWriter w)
   at DocumentFormat.OpenXml.OpenXmlPartRootElement.WriteTo(XmlWriter xmlWriter)
   at DocumentFormat.OpenXml.OpenXmlPartRootElement.SaveToPart(OpenXmlPart openXmlPart)
   at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.SavePartContents()
   at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.Dispose(Boolean disposing)
   at DocumentFormat.OpenXml.Packaging.OpenXmlPackage.Dispose()
James.

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Can we have multiple input streams for a java socket
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Doug.

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Hi All:
I am getting a multiple step error when I do this:
rs.Fields("MyField").Value = MyValue
I finally tracked down the error to being caused by this syntax:
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Last edited by anthonyclark (2008-04-02 13:30:58)

Thanks for the reply.
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Last edited by anthonyclark (2008-04-02 15:25:48)

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