On Mon, Oct 31, 2011 at 5:01 PM, Korey Calmettes <kcalmet...@icontime.com>wrote:
> Hello,
>
> We are having a random problem with our system that has be puzzled at
> this point.
>
> First a little background. We have an embedded system running an ARM
> processor and JFFS file system. We are running 3.7.7.1. I e-mailed
> about a month ago about enabling WAL on our system. Found out that I
> needed to set SQLITE_SHM_DIRECTORY to our tmpfs file system when
> compiling as JFFS doesn't support shared mmap files.
>
> This has been working fine, however throughout our testing, we have been
> hitting a problem. It seems that some tables are no longer accessible
> giving a Disk I/O Error. I logged into the command line interface and
> replicated the problem. I ran ".log stdout" and here are the results.
>
> sqlite> select password from auth;
> (522) statement aborts at 7: [select password from auth;]
> Error: disk I/O error
>
> However access to other tables will work without any problems.
>
Error code 522 is SQLITE_IOERR_SHORT_READ. It is generated here:
http://www.sqlite.org/src/artifact/07acbb3e074e?ln=3012
SQLite was trying to read N bytes and got back M byes where M>0 and M<N.
Perchance is your database file truncated? What happens when you run
"PRAGMA integrity_check" on the database? What is the page size of your
database?
>
> I searched for how to read the log without success. I am hopeful that
> someone would be able to tell me what's going on.
>
> Korey
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>
--
D. Richard Hipp
d...@sqlite.org
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