Jo Navy

With Java 8 the test desn't hang even with a CSV of 56k lines (2.8 MB, the real one used by my application). Since it is much bigger that the one that hangs with Java 25 I assume that it doesn't hang at all.

No, it can hang with Java 25 too: just create a bigger CSV. Try to duplicate the lines of my CSV (excluding the first 5 headerlines) to get a CSV of 7000+ lines and zip it again. This means that tests might pass but the application could hang in production when it gets a CSV bigger that the one used in tests. A very nasty scenario. I suspect a deadlock: I have noted that method ZipFile.stream() is internally synchronized in recent Java versions (not in Java 8) and that you are using threads, even...

No, it can hang with Java 25 too: just create a bigger CSV. Try to duplicate the lines of my CSV (excluding the first 5 headerlines) to get a CSV of 7000+ lines and zip it again. This means that tests might pass but the application could hang in production when it get a CSV bigger that the one used in tests. A very nasty scenario. I suspect a deadlock: I have noted that method ZipFile.stream() is internally synchronized in recent Java versions (not in Java 8) and that you are using threads, even...

Opencsv may hang when reading from zip file