Hi Stuart,

That sounds so familiar to my problem. I get this if there are
transactions committed to node1 while making a backup on node2.

hth

Stuart James wrote:
> Hi Emmanuel,
>
>
>
> We ran into the same issue again last night. I actually missed out part
> mentioning in yesterday's response, we do indeed use transactions with
> Begin/Commit, but not on our primary application, which is where I had
> focused my attention. Last night, as the night before where I was
> misguided to what I thought the problem was, it was in fact our Web
> application tier, which is a Hibernate implementation which uses the
> c3p0 JDBC pool implementation. Is there any known issues for c3p0 and
> Sequoia?
>
>
> We did see this also last night
>
> 2008-05-21 01:45:08,483 WARN  sequoia.controller.recoverylog Recovery
> log is dirty. Clearing. Please use restore log
>
> Currently our automated script, will take an image, and then purge the
> log from the image taken 3 days ago, so the above could have been
> related to anything from the 3 days prior.
>
> 2008-05-21 01:49:48,599 WARN  sequoia.controller.scheduler Timeout in
> begin, still waiting for 0 pending transactions to complete
>
> 2008-05-21 01:49:48,599 WARN  controller.virtualdatabase.XXXX Begin
> failed (Timeout in begin, still waiting for 0 pending
>  transactions to complete)
>
> 2008-05-21 01:49:48,599 INFO
> virtualdatabase.VirtualDatabaseWorkerThread.XXXX Error during command
> execution (Timeout in begin, still waiting for 0 pending transactions
> to complete)
>
>
> For me to fix this last night, I had to disable our web application
> servers from accessing the Sequoia cluster (not our primary
> application which does not use transactions) as a result of doing this
> the pg_dump started up.
>
> My question is, now that I know it is related to these web
> applications, which are using proper transactions, is it possible there
> is a begin without a commit / rollback in the recovery log, and if so
> is this why the sequoia is telling me it is a dirty recovery log as
> I had to manually shut those web applications down to release the lock
> on the transaction? If this is true, is there a potential that there is
> a pending open transaction from one of the web applications?
>
> I would try to tie that up based on our recovery log, but it was purged
> as a result of Sequoia claiming it was dirty.
>
> Would the same occur if we had just done a disable on the backend ?
>
> Regards,
>
>
> Stuart
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