Visualization as pdf document does not work on the OS/400 operating system

[lkszrn]

The visualization of the xml data as a pdf document with method toPDF() is not possible on the OS/400 (IBM i) operating system.
A lock occurs at java.io.UnixFileSystem.getBooleanAttributes0. The pdf document is created without content, but is then not filled with data. The program continues to run endlessly until it is aborted manually. The xml file to be visualized is located on the integrated file system of the ibm system i machine.

The following messages are displayed in the log:

[main] INFO org.apache.fop.apps.FopConfParser - COMMONS-LOGGING Default page-height set to: 297mm
[main] INFO org.apache.fop.apps.FopConfParser - COMMONS-LOGGING Default page-width set to: 210mm

According to the call stack, the last java call is java.io.UnixFileSystem.getBooleanAttributes0.

call_stack.txt

The problem occurs with the following configuration:

OS/400: V7R4M0
Mustang: 2.15.1
Java 17

[jstaerk]

how could one fix it (i.e. reproduce it - is there a os/400 emulator around anywhere) or even just find out if it's not a issue of Apache FOP?