Problem trying to open sentinel data

martscha · June 27, 2024, 9:34am

Hi,
I’m running the latest version of Snap 10.0.0 on Windows 11 Pro and I cannot open Sentinel 1 and Sentinel 2 data. I have used used previous version of Snap. I have uninstalled the software and reinstalled, same problem. I can open processed data saved as BEAM-DIMAP but not original data downloaded from Copernicus.

I get the following “unexpected exception”:
java.lang.NoClassDefFoundError: Could not initialize class org.gdal.gdalconst.gdalconstConstants
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized0(Native Method)
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized(Unsafe.java:1042)
at java.base/jdk.internal.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:43)
at java.base/jdk.internal.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:186)
at java.base/java.lang.reflect.Field.acquireFieldAccessor(Field.java:1105)
at java.base/java.lang.reflect.Field.getFieldAccessor(Field.java:1086)
at java.base/java.lang.reflect.Field.get(Field.java:418)
at org.esa.snap.dataio.gdal.drivers.GDALReflection.fetchGDALLibraryConstant(GDALReflection.java:36)
at org.esa.snap.dataio.gdal.drivers.GDALConst.gaReadonly(GDALConst.java:28)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.computeJP2MatrixCellsResolutionCountWithGDAL(Sentinel2ProductReader.java:297)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.computeJP2MatrixCellsResolutionCount(Sentinel2ProductReader.java:325)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.computeMatrixCellsResolutionCount(Sentinel2ProductReader.java:288)
at eu.esa.opt.dataio.s2.ortho.Sentinel2OrthoProductReader.addBands(Sentinel2OrthoProductReader.java:547)
at eu.esa.opt.dataio.s2.ortho.Sentinel2OrthoProductReader.readProduct(Sentinel2OrthoProductReader.java:266)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.readProductNodesImpl(Sentinel2ProductReader.java:201)
at org.esa.snap.core.dataio.AbstractProductReader.readProductNodes(AbstractProductReader.java:178)
at eu.esa.opt.dataio.s2.ortho.Sentinel2OrthoProductReaderProxy.readProductNodes(Sentinel2OrthoProductReaderProxy.java:90)
at org.esa.snap.core.dataio.ProductIO.readProduct(ProductIO.java:181)
at org.esa.snap.rcp.actions.file.ReadProductOperation.run(ReadProductOperation.java:61)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

Hoping to get help to figure out the problem and solve it.

Best regards,
Martina

diana_harosa · July 1, 2024, 8:29am

Dear @martscha,

Please close SNAP, delete the gdal folder located under C:\Users\[user]\.snap\auxdata, then restart SNAP and try to open a product.

martscha · July 4, 2024, 6:53am

I did so, it didn’t work and I get the following error:

java.lang.UnsatisfiedLinkError: ‘int org.gdal.gdalconst.gdalconstJNI.GDT_Unknown_get()’
at org.gdal.gdalconst.gdalconstJNI.GDT_Unknown_get(Native Method)
at org.gdal.gdalconst.gdalconstConstants.(gdalconstConstants.java:12)
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized0(Native Method)
at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized(Unsafe.java:1042)
at java.base/jdk.internal.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:43)
at java.base/jdk.internal.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:186)
at java.base/java.lang.reflect.Field.acquireFieldAccessor(Field.java:1105)
at java.base/java.lang.reflect.Field.getFieldAccessor(Field.java:1086)
at java.base/java.lang.reflect.Field.get(Field.java:418)
at org.esa.snap.dataio.gdal.drivers.GDALReflection.fetchGDALLibraryConstant(GDALReflection.java:36)
at org.esa.snap.dataio.gdal.drivers.GDALConst.gaReadonly(GDALConst.java:28)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.computeJP2MatrixCellsResolutionCountWithGDAL(Sentinel2ProductReader.java:297)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.computeJP2MatrixCellsResolutionCount(Sentinel2ProductReader.java:325)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.computeMatrixCellsResolutionCount(Sentinel2ProductReader.java:288)
at eu.esa.opt.dataio.s2.ortho.Sentinel2OrthoProductReader.addBands(Sentinel2OrthoProductReader.java:547)
at eu.esa.opt.dataio.s2.ortho.Sentinel2OrthoProductReader.readProduct(Sentinel2OrthoProductReader.java:266)
at eu.esa.opt.dataio.s2.Sentinel2ProductReader.readProductNodesImpl(Sentinel2ProductReader.java:201)
at org.esa.snap.core.dataio.AbstractProductReader.readProductNodes(AbstractProductReader.java:178)
at eu.esa.opt.dataio.s2.ortho.Sentinel2OrthoProductReaderProxy.readProductNodes(Sentinel2OrthoProductReaderProxy.java:90)
at org.esa.snap.core.dataio.ProductIO.readProduct(ProductIO.java:181)
at org.esa.snap.rcp.actions.file.ReadProductOperation.run(ReadProductOperation.java:61)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

Magda1 · November 22, 2024, 8:49am

Hi.
I’m beginner user of SNAP and Sentinel data. There is no problem with opening SLC product in SNAP 10. But when I try open GRD product the following error appearing: “could not initialize class org.ese.snap.dataio.gdal.reader.GDALProductReader”. I deleted gdal folder and restarted SNAP, but the new error appeared: “java.lang.ExceptionInitializerError”. Can you help what am I missing here?

diana_harosa · December 2, 2024, 9:22am

Could you provide some information about your OS and also attach the flog file
generated after reproducing the error?
Thank you!

Magda1 · January 10, 2025, 8:42am

My OS is Windows 10. What do you mean by saying “flog file”?

Magda1 · January 10, 2025, 9:33am

I work with Snap 10

diana_harosa · January 10, 2025, 11:18am

You can find the SNAP log file by selecting from the menu Help / Show Log Directory .
Make sure to reproduce the error first and then attach the messages.log file.

Celia-1 · August 6, 2025, 4:08am

我也遇到了这个无法初始化类的错误，然后删除gdal后导入数据压缩包也出现了这个java.lang.UnsatisfiedLinkError: 'int org.gdal.gdalconst.gdalconstJNI.GDT_Unknown_get()'这个错误，请问你解决了吗？

diana_harosa · August 6, 2025, 6:24am

Hi Celia,

Could you please provide information about the SNAP version you are using, as well as your operating system?

Celia-1 · August 6, 2025, 7:40am

Thanks！The version of snap is 12.0.Dell Notebook Windows 11,I have browsed through some of the messages above, but couldn’t find the messages.log file.