On Thu, Jul 8, 2010 at 10:56 PM, tamanna madaan
<tamanna.madan@globallogic.com> wrote:
> Hi All
>
> I am using a cluster setup with two nodes in it. Replication between two
> nodes is being done through slony.
>
> Postgres version is 8.1.2 and slony version is 1.1.5 .
>
> I am running an operation that does thousands of update/inserts/delete on
> some tables. While running update query on a
>
> particular table let say <abc> , it gives error “attempted to lock invisible
> tuple” and fails. This update query is supposed to update
>
> hundreds of record. Sometimes it gives the error while running this update
> query and sometimes not. I have seen postgres logs of two
>
> instances when it fails due to “attempted to lock invisible tuple” error ,
> in these two instances while it was doing an update on <abc> table,
>
> another query was going on the same table which was updating a particular
> record. Can this (two updates at the same time on the same table) be the
> reason for
>
> this error in some way ( just a guess) . If not, then what can be the
> reason of this error ??
Not sure what the cause is but have you tried updating to the latest
8.1.x version?