Multi-threading creates the pyramid.

[liminlu0314]

When creating a pyramid using multithreading, problems would occur if the cache was set to be too small or the image was too large.

#include "gdal_priv.h"
#include <thread>
using namespace std;

void ImageAddo(const char* pszFilename)
{
	GDALDataset *pDataset = (GDALDataset*)GDALOpen(pszFilename, GA_ReadOnly);
	const char* pszResampling = "nearest";
	if (pDataset == nullptr)
		return ;

	int iWidth = pDataset->GetRasterXSize();
	int iHeigh = pDataset->GetRasterYSize();
	int iNum = iWidth*iHeigh;
	int iRstNum = 16384;
	int iCurNum = iNum;
	int anLevels[1024] = { 0 };
	int nLevelCount = 0;
	do
	{
		anLevels[nLevelCount] = static_cast<int>(pow(2.0, nLevelCount + 2));
		iCurNum = static_cast<int>(iCurNum / 4);
		nLevelCount++;
	} while (iCurNum > iRstNum);

	if (nLevelCount > 0 && pDataset->BuildOverviews(pszResampling, nLevelCount, anLevels, 0, nullptr, nullptr, nullptr) != CE_None)
	{
		const char* pszLastErrMsg = CPLGetLastErrorMsg();
		GDALClose((GDALDatasetH)pDataset);
		return;
	}
	const char* pszLastErrMsg = CPLGetLastErrorMsg();
	GDALClose((GDALDatasetH)pDataset);
}

void main()
{
	GDALAllRegister();
	CPLSetConfigOption("USE_RRD", "NO");//generates the RRD format is fine.
	GDALSetCacheMax64(1*1024*1024);	//small cache

	char **papszFileList = NULL;
	papszFileList = CSLAddString(papszFileList, "E:\\DIM_PLNT_20160912_025516_0C43_MUX_OTH.tif");
	papszFileList = CSLAddString(papszFileList, "E:\\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif");
	
#ifdef OPENMP
#pragma omp parallel for
	for (int i = 0; i < 2; i++)
	{
		ImageAddo(papszFileList[i]);
	}
#else
	thread t1(ImageAddo, papszFileList[0]);
	thread t2(ImageAddo, papszFileList[1]);

	t1.join();
	t2.join();
#endif

	CSLDestroy(papszFileList);
}

output information:

ERROR 1: _tiffWriteProc:No such file or directory
ERROR 1: TIFFResetField:E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr: Can not read TIFF directory entry.
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 5594
ERROR 1: IReadBlock failed at X offset 5, Y offset 0: TIFFReadDirectory:Failed to read directory at offset 5594
ERROR 1: TIFFScanlineSize64:Computed scanline size is zero
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFWriteEncodedStrip:Must set "ImageWidth" before writing data
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 41524
ERROR 1: An error occurred while writing a dirty block
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 5594
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 7340
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 8030
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 8336
ERROR 1: E:\DIM_PLNT_20160912_025515_0C43_MUX_OTH.tif.ovr:Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each)
ERROR 1: TIFFReadDirectory:Failed to read directory at offset 8546

[liminlu0314]

If USE_RRD=YES is set, there is no output error message, but the result is incorrect.

CPLSetConfigOption("USE_RRD", "YES");

The results refer to the attachment.

[Even Rouault]

This ticket has been automatically closed because Trac is no longer used for GDAL bug tracking, since the project has migrated to GitHub. If you believe this ticket is still valid, you may file it to ​https://github.com/OSGeo/gdal/issues if it is not already reported there.