Hi again!
I just encountered this problem again myself, so I was able to check my
theory.
So one of the bitcask.write.lock files contained this:
2272
/var/lib/riak/bitcask/1121816686466884466511812771987303177196838846464/1305008752.bitcask.data
and sure enough 'ps axu' gives me:
riak 2269 0.0 0.0 10624 396 ? S 12:46 0:00
inet_gethost 4
riak 2270 0.0 0.0 10624 432 ? S 12:46 0:00
inet_gethost 4
riak 2271 0.0 0.0 10624 432 ? S 12:46 0:00
inet_gethost 4
riak 2272 0.0 0.0 10624 384 ? S 12:46 0:00
inet_gethost 4
root 3139 0.0 0.0 0 0 ? S 13:00 0:00
[flush-254:1]
Cheers,
Nico
Am 10.05.2011 03:07, schrieb Gary William Flake:
(Removing riak-users.)
This was on an Umbuntu 10.04 box. Riaksearch was auto started in init.d but we
occasionally start/stop the service as part of our application stack. In this
one case, we did a shutdown from an admin web console, which may have not
called the proper shutdown procedures in init.d. On restart, I noticed the
issues and found the locked files. Removing them did the trick.
-- GWF
On May 9, 2011, at 7:10 AM, David Smith wrote:
Hmm...ok. Will have to ponder how we can fix that.
Thanks!
D.
On Mon, May 9, 2011 at 8:09 AM, Nico Meyer<[email protected]> wrote:
Hi Dave,
I believe problem occours if there happens to be another process with
the same PID as the old (now gone) riak node. This can happen if the
machine was rebooted since the riak node crashed or if the PIDs wrapped,
they are only two bytes after all.
os_pid_exists/1 only checks for ANY process with the PID from the
lockfile
(https://github.com/basho/bitcask/blob/master/src/bitcask_lockops.erl#L116).
Am Montag, den 09.05.2011, 07:06 -0600 schrieb David Smith:
On Sat, May 7, 2011 at 9:25 AM, Gary William Flake<[email protected]> wrote:
That was it, Nico. Thanks.
I know we did a forced shutdown this week, which was probably the cause. But I
would have thought that riak would have taken care of its own lock file
bookkeeping on restarting.
Bitcask does:
https://github.com/basho/bitcask/blob/master/src/bitcask_lockops.erl#L46
It's curious that the logic didn't handle the case. What platform/OS
are you on? Are you using init scripts to restart on boot?
Thanks,
D.
--
Dave Smith
Director, Engineering
Basho Technologies, Inc.
[email protected]
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