From: | Rob Sargent <robjsargent(at)gmail(dot)com> |
---|---|
To: | Sam Gendler <sgendler(at)ideasculptor(dot)com> |
Cc: | Philip Semanchuk <philip(at)americanefficient(dot)com>, Ian Harding <harding(dot)ian(at)gmail(dot)com>, Ron <ronljohnsonjr(at)gmail(dot)com>, "pgsql-generallists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
Subject: | Re: How different is AWS-RDS postgres? |
Date: | 2021-05-27 22:35:41 |
Message-ID: | 1c323f49-ae05-b5a1-f3ef-518130eb892a@gmail.com |
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Thread: | |
Lists: | pgsql-general |
On 5/27/21 4:25 PM, Sam Gendler wrote:
> That sure looks like something is causing your connection to have a
> transaction rollback. I haven't worked in Java in far too long, but
> it seems like your connection pool is under the impression your
> connection was abandoned so it reclaims it and rollback the
> transaction, which would explain why you aren't seeing the table when
> all is said and done - all of the work is being undone at the end.
>
> One possibility, based on the catalina log you provided - if you have
> either end of the connection set up to automatically close idle
> connections after a period of time, then you might receive a closed
> connection from the pool, which will just error out when you attempt
> to run a query. In which case, you need to set up your connection pool
> to test a connection before it returns it to the requester. Usually
> something as simple as "select 2" will be sufficient to determine if
> the database connection is open. I can just about guarantee that your
> connection pool has a parameter which allows you to specify a query to
> execute when a connection is requested.
>
Well I /was/ doing
contextResource.setProperty("validationQuery", "SELECT 1");
but I see that I lost that when I switched to using a properties file.
Thanks for point me there.
The loop of 16 insert statement is in a single transaction, single
connection so I'm not sure who's choking first. Is the connection idle
after the I/O error or is the I/O error from a dead connection? (Small
disclaimer: there is no catalina involved here, just an embedded tomcat
instance.)
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