flock is held after ceph-osd daemon being stopped

Hi All, I noticed a locking issue in kernel device. When I stopped the ceph cluster and all daemons, the kernel device _lock somehow is still held and this line below will return r < 0: int KernelDevice::_lock() { int r = ::flock(fd_directs[WRITE_LIFE_NOT_SET], LOCK_EX | LOCK_NB); … } The way I stop the cluster and daemons: sudo ../src/stop.sh sudo bin/init-ceph --verbose forcestop This error happens even after the reboot when I try to use vstart: bdev _lock flock failed on ceph/build/dev/osd0/block bdev open failed to lock /home/yzhan298/ceph/build/dev/osd0/block: (11) Resource temporarily unavailable OSD::mkfs: couldn't mount ObjectStore: error (11) Resource temporarily unavailable ** ERROR: error creating empty object store in ceph/build/dev/osd0: (11) Resource temporarily unavailable Please advice. (On master branch) Thanks, Yiming