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Re: A bug with innodb on Linux? Can't be started a second time.
Posted by: Sarah Tisdale
Date: May 02, 2005 06:01PM

I routinely run into this problem every time the machine my mysql server is on goes down.

Since my database is on a remote NFS disk, I'm pretty sure the problem has to do with a bug in NFS advisory file locking. It appears that sometimes these locks don't get cleared properly and one can end up with files locked by non-existent processes.
Here are some links about that bug:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=111918
http://www.ussg.iu.edu/hypermail/linux/kernel/0312.0/1284.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0312.1/0462.html

I wrote a small C program that uses "fcntl" system call to read and dump the information about who is locking the file. In every case, the lock owner is a process that doesn't exist.

Quick/dirty workaround: Simply make a new copy of the database with "gcp -a". The new copy starts up fine.

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Re: A bug with innodb on Linux? Can't be started a second time.
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May 02, 2005 06:01PM


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