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https://issues.apache.org/jira/browse/XERCESC-1692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luzius Blatter updated XERCESC-1692:
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Summary: A createElement() - release() call sequence doesn't release the
allocated memory. The memory is blocked until the document is released. (was:
A createElement() - relase() call sequence doesn't release the allocated
memory. The memory is blocked until the document is released.)
> A createElement() - release() call sequence doesn't release the allocated
> memory. The memory is blocked until the document is released.
> ---------------------------------------------------------------------------------------------------------------------------------------
>
> Key: XERCESC-1692
> URL: https://issues.apache.org/jira/browse/XERCESC-1692
> Project: Xerces-C++
> Issue Type: Wish
> Components: DOM
> Affects Versions: 2.7.0
> Environment: Windows XP
> Mircosoft MSVC 8.0 (Visual Studio 2005)
> Reporter: Luzius Blatter
>
> // We have long jobs over night where DOM documents are manipulated
> // with frequent "AddChild" and "RemoveChild" calls.
> // The documents are released at the end of the jobs.
> //
> // Now we have the problem the the system goes out of memory.
> // The reason is that all memory allocations aren't deallocated before
> // the the document is released.
> //
> // My wish is: I would like to release DOM elements with a true memory
> deallocation.
> //
> // The following code fragment shows the problem:
> //
> // Get the DOM implementation
> DOMImplementation *pDOMImplementation =
> DOMImplementationRegistry::getDOMImplementation(NULL);
> // Create a DOM document
> XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *pDocument =
> pDOMImplementation->createDocument();
> // Create and release many DOM elements
> int iElement = 0;
> while(iElement < 1000000)
> {
> // Create a element:
> DOMElement *pElement = pDocument->createElement(L"A");
> // Release the element:
> pElement->release();
> //Note: Although the orphaned element is now released, the memory remains
> blocked
> // and can't be reused (even not for the next element in the loop!)
> iElement++;
> }
> // Now we have around 24 MB blocked.
> pDocument->release();
> //Note: Now the memory is deallocated and can be reused.
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