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From:Ravi Prasad LR Date:January 11 2006 12:12pm
Subject:Mysql Server crashes saying Page directory corruption
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Hi all,  
Server version :4.0.26
 OS: FeeBSD-4.10
   The mysql server(slave) crashes with the following messages in its error 
log, and gets restarted, after which rollbacks and starts replicating from 

Page directory corruption: supremum not pointed to
051226 10:02:58  InnoDB: Page dump in ascii and hex (16384 bytes):
 len 16384; hex 0000000000000000000000000000000000000000000000000000.....(many 
  ;InnoDB: End of page dump
051226 10:02:58  InnoDB: Page checksum 1575996416, prior-to-4.0.14-form 
checksum 1371122432
InnoDB: stored checksum 0, prior-to-4.0.14-form stored checksum 0
InnoDB: Page lsn 0 0, low 4 bytes of lsn at page end 0
InnoDB: Error: trying to access a stray pointer 0xc9c1bff8
InnoDB: buf pool start is at 0x52a4000, number of pages 70400
051226 10:02:58InnoDB: Assertion failure in thread 20491 in 
file ../../innobase/page/../include/buf0buf.ic line 286
InnoDB: We intentionally generate a memory trap
InnoDB: Submit a detailed bug report to
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: about forcing recovery.
mysqld got signal 11;

 it is a slave server replicating from a master. There are no reads happening 
while server crashed. This has happened couple of times. we tried restoring  
mysql with a  backup of master. But it goes through fine for few days(2-3 
days) , after which the same error reiterated. 
what does this error mean?
Please help me in figuring out this error.

Thanks ,
Mysql Server crashes saying Page directory corruptionRavi Prasad LR11 Jan
Re: Mysql Server crashes saying Page directory corruptionHeikki Tuuri12 Jan