After upgrading systemd from V219 to v247, journalctl stops working:
journalctl -u v2ray
Journal file /var/log/journal/xxxx/user-1000.journal uses an unsupported feature, ignoring file.
Use SYSTEMD_LOG_LEVEL=debug journalctl –file=/var/log/journal/xxxx/user-1000.journal to see the details.
SYSTEMD_LOG_LEVEL=debug journalctl –file=/var/log/journal/xxxx/user-1000.journal
Journal effective settings seal=no keyed_hash=yes compress=no compress_threshold_bytes=8B
Journal file /var/log/journal/xxxx/user-1000.journal uses incompatible flag xz-compressed disabled at compilation time.
Failed to open journal file /var/log/journal/xxxx/user-1000.journal: Protocol not supported
mmap cache statistics: 0 hit, 1 miss
Failed to open files: Protocol not supported
journalctl –version
systemd 247 (247)
-PAM -AUDIT -SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP -LIBCRYPTSETUP -GCRYPT -GNUTLS -ACL -XZ -LZ4 -ZSTD -SECCOMP +BLKID -ELFUTILS -KMOD -IDN2 -IDN -PCRE2 default-hierarchy=unified
systemctl restart systemd-journald
Warning: The unit file, source configuration file or drop-ins of systemd-journald.service changed on disk. Run ‘systemctl daemon-reload’ to reload units.
systemctl daemon-reload
Now, journalctl -u v2ray works well.
