Class not found b'io/anserini/analysis/DefaultEnglishAnalyzer'

[PepijnBoers]

Obtained a JavaException error after importing: from pyserini.search import pysearch

--> Error: ... jnius.JavaException: Class not found b'io/anserini/analysis/DefaultEnglishAnalyzer'

Installed Pyserini via: pip install pyserini --user

I was not able to resolve this, I tried:

• replacing the fatjar with a newly built Anserini 0.8.1 fatjar
• manual configuration of classpath via configure_classpath() method in pyserini.setup.

---

Complete error:

Traceback (most recent call last): File "build_db.py", line 6, in <module> from pyserini.search import pysearch File "/home/pboers/.local/lib/python3.7/site-packages/pyserini/search/pysearch.py", line 25, in <module> from ..pyclass import JSearcher, JResult, JDocument, JString, JArrayList, JTopics, JTopicReader File "/home/pboers/.local/lib/python3.7/site-packages/pyserini/pyclass.py", line 51, in <module> JDefaultEnglishAnalyzer = autoclass('io.anserini.analysis.DefaultEnglishAnalyzer') File "/home/pboers/.local/lib/python3.7/site-packages/jnius/reflect.py", line 208, in autoclass c = find_javaclass(clsname) File "jnius/jnius_export_func.pxi", line 28, in jnius.find_javaclass jnius.JavaException: Class not found b'io/anserini/analysis/DefaultEnglishAnalyzer'

[PepijnBoers]

Issue only occurs on one specific machine.

[PepijnBoers]

Issue was caused by running an older Java version (8), upgrading to Java 11 solved this problem.