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I messed up! Deleted ibdata1...

#1
I made the mistake of deleting ibdata1 from /var/lib/mysql, unforunately the service was restarted and the delete file is now gone.

MySQL wont start now due to this, and Im in desprate desire to get my site back up and running.
Code:
121210 11:11:10 [Note] Plugin 'FEDERATED' is disabled.
121210 11:11:10 InnoDB: The InnoDB memory heap is disabled
121210 11:11:10 InnoDB: Mutexes and rw_locks use GCC atomic builtins
121210 11:11:10 InnoDB: Compressed tables use zlib 1.2.3.4
121210 11:11:10 InnoDB: Initializing buffer pool, size = 128.0M
121210 11:11:10 InnoDB: Completed initialization of buffer pool
121210 11:11:10 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!
121210 11:11:10  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...
121210 11:11:10  InnoDB: Assertion failure in thread 140648100542272 in file fsp0fsp.c line 2102
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.
16:11:10 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=16777216
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 = 346681 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
 
Thread pointer: 0x0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0 thread_stack 0x30000
mysqld(my_print_stacktrace+0x29)[0x7feb3068d759]
mysqld(handle_fatal_signal+0x483)[0x7feb30554ae3]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7feb2f2a6cb0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35)[0x7feb2e912425]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x17b)[0x7feb2e915b8b]
mysqld(+0x65a400)[0x7feb30798400]
mysqld(+0x65fd6f)[0x7feb3079dd6f]
mysqld(+0x66c2be)[0x7feb307aa2be]
mysqld(+0x637925)[0x7feb30775925]
mysqld(+0x5e4a67)[0x7feb30722a67]
mysqld(+0x5ae989)[0x7feb306ec989]
mysqld(_Z24ha_initialize_handlertonP13st_plugin_int+0x41)[0x7feb30557111]
mysqld(+0x307cf1)[0x7feb30445cf1]
mysqld(_Z11plugin_initPiPPci+0xa94)[0x7feb30449314]
mysqld(+0x281a06)[0x7feb303bfa06]
mysqld(_Z11mysqld_mainiPPc+0x59b)[0x7feb303c30eb]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7feb2e8fd76d]
mysqld(+0x27b845)[0x7feb303b9845]
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
this is what I get when attempting to start mysql.. start mysql just says job failed, so im manually starting using mysqld to see the errors. please help!
 

Luke F

Well-known member
#2
hard power off the box immediately (no graceful shutdowns)

then grab an image of the disk (or just access it directly, I guess it doesn't matter) using another box and run some recovery tools
 
#3
Since it appears all the data is in the tables, is there anyway to repopulate the innodb data? I was able to get mysql started again, and i essentially made a backup and have a fresh installation now. I copies the .frm/.myi/.myd data to the new folder, but it doesnt show up..

will any of the rebuild functions in admin resolve this?
 

Luke F

Well-known member
#6
Since it appears all the data is in the tables, is there anyway to repopulate the innodb data? I was able to get mysql started again, and i essentially made a backup and have a fresh installation now. I copies the .frm/.myi/.myd data to the new folder, but it doesnt show up..

will any of the rebuild functions in admin resolve this?
ibdata1 contains basically all of xenforo (and other innodb tables) when using the default setting for innodb table storage (as most people do)

If you have no backup, your only option is to use recovery tools