bazaar locks...

[Michael Andronov]

hi,

I'm periodically observing the following issue while pushing to remote server:
"
...
bzr: ERROR: Could not acquire lock "LockDir(sftp://michaela@....
/.bzr/branch/lock)":
Unable to obtain lock
sftp://michaela@localhost.../.../.../.../.../.bzr/branch/lock
held by michaela at Michael-Andronovs-Mac-mini.local on host
Michael-Andronovs-Mac-mini.local [process #60568]
locked 145 hours, 59 minutes ago
Will continue to try until 11:47:33, unless you press Ctrl-C.
See "bzr help break-lock" for more.
...
"
I'm wondering  -
a. What is the most common problem, leading to that? Broken process?
b. What would be  the most common algorithm for recovery? ( assuming
that the 'pushes' are done automatically by computer).

Thanks.

Michael.