OnLine Problem

HI All, We experience sudden crash of our Informix Instances. We run several instances at the same time. One C program access a number of them making one of them crash randomly. The log generated shows a Internal Bus Error problem forcing Online to shutdown. Here is an extract of the dump generated. 12:32:06 Assert Failed: Internal Error - Bus Error 12:32:06 Who: Session(6, csstest@hcs1, 29423, -1001958512) Thread(36, srvinfx, c4451cd8, 1) 12:32:06 Results: OnLine must abort 12:32:06 Action: Reinitialize shared memory 12:32:06 See Also: /tmp/af.24dab5, shmem.24dab5.0 12:32:06 Stack for thread: 36 srvinfx The same C program on another box works well so we think it is an Informix or Unix configuration problem...but so far we haven't found anything obvious. Any clue ? Thanks Vincent

Assert failures are usually Informix problems, not application or UNIX problems. Basically an Informix developer has put an assert statement in the code, that catches an "impossible" situation.. If you have a support contract, call Informix, discuss, email them the log and the /tmp/af.24dab5 file. Also you don't have to dump the shared memory since it is useless in analyzing the problem - and it can drive your file system out of space. To turn it off look in the onconfig file. Also, someone else in this group may have more information about this bug. Vincent Birlouez wrote: > HI All, > > We experience sudden crash of our Informix Instances. > We run several instances at the same time. One C program access a number of > them making one of them crash randomly. The log generated shows a Internal > Bus Error problem forcing Online to shutdown. > > Here is an extract of the dump generated. > > 12:32:06 Assert Failed: Internal Error - Bus Error > 12:32:06 Who: Session(6, csstest@hcs1, 29423, -1001958512) > Thread(36, srvinfx, c4451cd8, 1) > 12:32:06 Results: OnLine must abort > 12:32:06 Action: Reinitialize shared memory > 12:32:06 See Also: /tmp/af.24dab5, shmem.24dab5.0 > 12:32:06 Stack for thread: 36 srvinfx> > The same C program on another box works well so we think it is an Informix > or Unix configuration problem...but so far we haven't found anything > obvious. > > Any clue ? > > Thanks > Vincent

Vincent Birlouez wrote: > > HI All, > > We experience sudden crash of our Informix Instances. > We run several instances at the same time. One C program access a number of > them making one of them crash randomly. The log generated shows a Internal > Bus Error problem forcing Online to shutdown. > > Here is an extract of the dump generated. > > 12:32:06 Assert Failed: Internal Error - Bus Error > 12:32:06 Who: Session(6, csstest@hcs1, 29423, -1001958512) > Thread(36, srvinfx, c4451cd8, 1) > 12:32:06 Results: OnLine must abort > 12:32:06 Action: Reinitialize shared memory > 12:32:06 See Also: /tmp/af.24dab5, shmem.24dab5.0 > 12:32:06 Stack for thread: 36 srvinfx> > The same C program on another box works well so we think it is an Informix > or Unix configuration problem...but so far we haven't found anything > obvious. VERSIONS? Version and platform information on both boxes is essential for anyone to help you. For example: Known bug in 7.24UC7 if a process accesses databases on multiple servers through a connection to one of the servers one of the servers can crash (separate connections to all servers seems to be OK). Is this the bug you are hitting? I do not know since I do not know your versions! Art S. Kagel

Vince, are these the only assert failure message in the logs or did you see a segmentation fault prior to this, if you are on a version lower than 7.24.UC5 you most definetly hit bug# 84642, which is fixed in 7.24.UC5. The version of your server will help us trace the problem. --Anil Vincent Birlouez wrote: > HI All, > > We experience sudden crash of our Informix Instances. > We run several instances at the same time. One C program access a number of > them making one of them crash randomly. The log generated shows a Internal > Bus Error problem forcing Online to shutdown. > > Here is an extract of the dump generated. > > 12:32:06 Assert Failed: Internal Error - Bus Error > 12:32:06 Who: Session(6, csstest@hcs1, 29423, -1001958512) > Thread(36, srvinfx, c4451cd8, 1) > 12:32:06 Results: OnLine must abort > 12:32:06 Action: Reinitialize shared memory > 12:32:06 See Also: /tmp/af.24dab5, shmem.24dab5.0 > 12:32:06 Stack for thread: 36 srvinfx> > The same C program on another box works well so we think it is an Informix > or Unix configuration problem...but so far we haven't found anything > obvious. > > Any clue ? > > Thanks > Vincent