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Biffen
n00b
Joined: 23 Nov 2004
Posts: 32
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 Posted: Tue Dec 05, 2006 7:11 am Post subject: Bus error when using mysqldump |
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Hi,
I have problems after upgraded mysql from 4.1.21 to 5.0.26. I got bus error when using mysqldump, all works fine when using phpmyadmin dumping databases. Any tip whats wrong?
Netra X1 512 meg ram:
linux-2.4.32-sparc-r6
Greets,
Biffen |
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Ferris
Retired Dev
Joined: 13 Jan 2003
Posts: 426
Location: N. Virginia (USA)
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| Posted: Tue Dec 05, 2006 12:49 pm Post subject: |
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A bus error usually results from a data alignment problem. I can duplicate the problem, so I believe that the mysqldump program itself is creating misaligned data. There is nothing you can do yourself (unless you want to fix mysqldump), but you should file a bug report against mysql (which is where mysqldump comes from).
In other words, you are not doing anything wrong; mysqldump is. Please file a bug report at https://bugs.gentoo.org (with architecture = sparc) against dev-db/mysql-5.0.26.
(By the way, my experiences with that upgrade suggest that mysql-4.1.21 databases should work with mysql-5.0.26 without conversion. Are you seeing something different?)
Regards,
Ferris |
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Biffen
n00b
Joined: 23 Nov 2004
Posts: 32
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| Posted: Thu Dec 07, 2006 8:46 am Post subject: |
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| Ferris wrote: | A bus error usually results from a data alignment problem. I can duplicate the problem, so I believe that the mysqldump program itself is creating misaligned data. There is nothing you can do yourself (unless you want to fix mysqldump), but you should file a bug report against mysql (which is where mysqldump comes from).
In other words, you are not doing anything wrong; mysqldump is. Please file a bug report at https://bugs.gentoo.org (with architecture = sparc) against dev-db/mysql-5.0.26.
(By the way, my experiences with that upgrade suggest that mysql-4.1.21 databases should work with mysql-5.0.26 without conversion. Are you seeing something different?)
Regards,
Ferris |
Ok, sending a bug report.
I used the http://www.gentoo.org/doc/en/mysql-upgrading.xml part 1 for upgrade. |
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Biffen
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Joined: 23 Nov 2004
Posts: 32
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| Posted: Thu Dec 07, 2006 12:36 pm Post subject: |
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Intresting... got this when I made a bug report:
"reopen once you've posted all the relevant information here."
How could I know whats relevant? =P |
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Biffen
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Joined: 23 Nov 2004
Posts: 32
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Biffen
n00b
Joined: 23 Nov 2004
Posts: 32
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| Posted: Tue Dec 12, 2006 12:46 pm Post subject: |
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Not fixed in the latest mysql-5.0.30.ebuild, will go back to mysql-4.1.21.
Last edited by Biffen on Thu Dec 14, 2006 7:03 am; edited 1 time in total |
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Ferris
Retired Dev
Joined: 13 Jan 2003
Posts: 426
Location: N. Virginia (USA)
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| Posted: Tue Dec 12, 2006 1:23 pm Post subject: |
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| As noted on your bug report, we know what and where the problem is, and the MySQL upstream developers have been notified. It's up to them to fix it, I think, because the failure comes from widening a pointer '(char*) arg' to reference it as '*(uint*) arg' --- something which is generally prohibited on sparc because of sparc's data alignment requirements. A patch is easy, but whether or not it is a good fix depends on just what MySQL has arg pointing to in the first place. |
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Biffen
n00b
Joined: 23 Nov 2004
Posts: 32
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| Posted: Thu Dec 14, 2006 7:06 am Post subject: |
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| Ferris wrote: | | As noted on your bug report, we know what and where the problem is, and the MySQL upstream developers have been notified. It's up to them to fix it, I think, because the failure comes from widening a pointer '(char*) arg' to reference it as '*(uint*) arg' --- something which is generally prohibited on sparc because of sparc's data alignment requirements. A patch is easy, but whether or not it is a good fix depends on just what MySQL has arg pointing to in the first place. |
Yes, time will tell. No problem for me, using 4.1.21 for now. |
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Gentoo on Sparc
