tools/cephfs_mirror: Fix crash loading persisted sync stats on restart
PeerReplayer::apply_persisted_dir_sync_stat() took a reference into
a json_spirit::mValue for last_synced_snap, then reused that same
mValue for nested field lookups. The get_json_value() overwrote the
parent value and left a dangling Object reference, which could abort
the daemon when directories were re-acquired after a mirror daemon
restart or a mgr failover.
The fix is to Copy last_synced_snap before reading nested fields,
add typed JSON helpers (moved to Utils) that check types before
get_* calls, and catch std::exception so unexpected parse failures
are logged instead of taking down cephfs-mirror.
projects / ceph.git / commit