java.lang.NoClassDefFoundError: com/sun/nio/zipfs/ZipFileSystemProvider

development python
#1

Hello,

I cannot read Sentinel-1 zip file using snappy.ProductIO.readProduct.

My environment:
Windows 10 64-bit
SNAP 8.0
Python 3.9.5 (tags/v3.9.5:0a7dcbd, May 3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)] on win32
Snappy configured to be used with python via snappy-conf

My code:

import snappy
inFile = 'S1B_IW_GRDH_1SDV_20200911T161910_20200911T161935_023330_02C4EE_D87E.zip'
product = snappy.ProductIO.readProduct(inFile)

Error:
RuntimeError: java.lang.NoClassDefFoundError: com/sun/nio/zipfs/ZipFileSystemProvider

#2

Have you configured a special JAVA JDK?
Actually this class is part of the JDK provided by SNAP.

#3

No, could you please tell me, how special JAVA JDK must be configured?

#4

Actually no specially configuration must be applied.
Maybe the python version 3.9.5 causes a problem.
Can you try with an older Python? Maybe 3.6?