On 07/10/2012 01:06 PM, Jeff Ross wrote:
Hi all,
I have an anomaly on my hands that I'm at a loss to understand.
We recently ran a small survey where participants were required to
answer all the questions. After validation for skipped questions,
mis-ranking answers that had to be ranked and so on, I did all of the
inserts to the survey_answers table inside a transaction block followed
by a commit. Immediately after, I updated the survey_response table
and set a timestamp to show the submitted time.
In 3 of the 38 responses, the logs show the inserts with no database
errors followed by the update statement, however, there are no entries
for that person in the survey_answers table. It is as if the
transaction rolled back, but if so, that fact is not in the logs.
After finding these anomalies, I cut and pasted the insert statements
from the logs into a file and inserted them manually with psql -f. No
errors, so I can't see why the transaction should have rolled back, if
indeed that is what happened. Is it possible for a transaction to
silently fail?
This is 9.1.3 running on OpenBSD and on a BBU RAID 1 mirror. It is the
master in a hot-standy setup. Logging is set to "all". I have no
reason to believe (yet, anyway) that this is some sort of hardware
problem as I see no indication of that anywhere else.
Thanks for any and all ideas!
For your initial attempt everything was done in one session?
I am also confused by this:
2012-06-19 15:37:36.258912500 <www%wykids> LOG: statement: commit
2012-06-19 15:29:11.573396500 <www%wykids> LOG: statement: update
survey_response set srv_resp_submitted = now() where srv_resp_srv_id = 2
and srv_resp_pp_id = 25399
Note the time stamps. Is this the actual log?
Jeff Ross
Wyoming Children's Action Alliance
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Adrian Klaver
adrian.klaver@xxxxxxxxx
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