Messages file(s) shows similar records to the example below: ssldata: [E] ns_archive_add() failed:NSLIB2:Archive [0xf000d40c;code:12;sub:212] libarchive error ssldata: [E] ns_archive_add() failed:NSLIB2:Archive [0xf000d30c;code:12;sub:211] libarchive error
The libarchive library provides a single interface for reading/writing various compression format archives. These errors can occur if there is no disk space left or the write system call is interrupted by a signal.
The CLI command session log export executes the code path that can display archive error subcodes 211, 212.
Error 211 means zero bytes were written/archived. Error 212 means some but not all of the requested bytes were written/archived.
In logs/nginx_access.log filein exported Diagnostics, we can also verify a SSL session log export was indeed running by searching for ssl_session_log string: