I got the problem with starting my mysql server, it was working fine until I copied the "read" mysql configuration file (/usr/local/share/mysql/my-huge.cnf) to the /etc/my.cnf, then I restarted my mysql server and unfortunatelly it stopped , instead of restarted.
I dont have any console errors, but this appear in my /var/db/mysql/hostname.pid file:
120312 17:57:43 mysqld_safe mysqld from pid file /var/db/mysql/hostname.pid ended
120312 17:58:09 mysqld_safe Starting mysqld daemon with databases from /var/db/mysql
120312 17:58:09 InnoDB: The InnoDB memory heap is disabled
120312 17:58:09 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120312 17:58:09 InnoDB: Compressed tables use zlib 1.2.3
120312 17:58:09 InnoDB: Initializing buffer pool, size = 128.0M
120312 17:58:09 InnoDB: Completed initialization of buffer pool
120312 17:58:09 InnoDB: highest supported file format is Barracuda.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
120312 17:58:09 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
120312 17:58:09 InnoDB: Assertion failure in thread 34387018176 in file fsp0fsp.c line 2040
InnoDB: Failing assertion: inode
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
17:58:09 UTC - mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.
key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=0
max_threads=151
thread_count=0
connection_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 338444 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
120312 17:58:09 mysqld_safe mysqld from pid file /var/db/mysql/hostname.pid ended
Whats wrong?
Not sure if you've found the answer on your own yet, but in my experience my.cnf has historically lived under /var/db/mysql.