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Posted to user@cassandra.apache.org by Cyril Scetbon <cy...@free.fr> on 2013/11/14 15:08:53 UTC

Hints still exist for a removed node

Hi,

I saw on http://www.datastax.com/dev/blog/modern-hinted-handoff (wrote on december 2012) that hints targeting a removed node (our case) are automatically removed. However, a compaction has been done on our cf and hints for the removed node are still stored. We're using version 1.2.2 (February 2013). Do you mean by automatically that they will be removed after a period of time but not after a compaction ? I see a TTL of 10 days added to each row in the hints data file.

Another question, is about "Finished hinted handoff of 0 rows to endpoint" info messages. CASSANDRA-5068 patch included in our version is supposed to fix a bad behaviour which was the cause of similar messages. We don't have hints stored for the endpoints concerned by these messages, but they appear in our log files. I don't know if it's related but I have a compaction of hints at the same time : http://pastebin.com/71nw2Uqh . Can Anyone explain us what's happening if it's an expected behaviour.

thanks
-- 
Cyril SCETBON

Re: Hints still exist for a removed node

Posted by Cyril Scetbon <cy...@free.fr>.

thanks

On 14 Nov 2013, at 21:25, Robert Coli <rc...@eventbrite.com> wrote:

> gc_grace_seconds

Re: Hints still exist for a removed node

Posted by Robert Coli <rc...@eventbrite.com>.

On Thu, Nov 14, 2013 at 6:08 AM, Cyril Scetbon <cy...@free.fr>wrote:

> I saw on http://www.datastax.com/dev/blog/modern-hinted-handoff (wrote on
> december 2012) that hints targeting a removed node (our case) are
> automatically removed. However, a compaction has been done on our cf and
> hints for the removed node are still stored. We're using version 1.2.2
> (February 2013). Do you mean by automatically that they will be removed
> after a period of time but not after a compaction ? I see a TTL of 10 days
> added to each row in the hints data file.
>

gc_grace_seconds


> We're using version 1.2.2 (February 2013).
>

1.2.2 contains serious bugs, upgrade ASAP.

"Finished hinted handoff of 0 rows to endpoint"
>

Doesn't have any meaningful impact, is probably fixed upstream.

=Rob