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From Arya Goudarzi <gouda...@gmail.com>
Subject Re: 1.1.5 Missing Insert! Strange Problem
Date Wed, 26 Sep 2012 07:03:34 GMT
No. We don't use TTLs.

On Tue, Sep 25, 2012 at 11:47 PM, Roshni Rajagopal <
roshni_rajagopal@hotmail.com> wrote:

>  By any chance is a TTL (time to live ) set on the columns...
>
> ------------------------------
> Date: Tue, 25 Sep 2012 19:56:19 -0700
> Subject: 1.1.5 Missing Insert! Strange Problem
> From: goudarzi@gmail.com
> To: user@cassandra.apache.org
>
>
> Hi All,
>
> I have a 4 node cluster setup in 2 zones with NetworkTopology strategy and
> strategy options for writing a copy to each zone, so the effective load on
> each machine is 50%.
>
> Symptom:
> I have a column family that has gc grace seconds of 10 days (the default).
> On 17th there was an insert done to this column family and from our
> application logs I can see that the client got a successful response back
> with write consistency of ONE. I can verify the existence of the key that
> was inserted in Commitlogs of both replicas however it seams that this
> record was never inserted. I used list to get all the column family rows
> which were about 800ish, and examine them to see if it could possibly be
> deleted by our application. List should have shown them to me since I have
> not gone beyond gc grace seconds if this record was deleted during past
> days. I could not find it.
>
> Things happened:
> During the same time as this insert was happening, I was performing a
> rolling upgrade of Cassandra from 1.1.3 to 1.1.5 by taking one node down at
> a time, performing the package upgrade and restarting the service and going
> to the next node. I could see from system.log that some mutations were
> replayed during those restarts, so I suppose the memtables were not flushed
> before restart.
>
>
> Could this procedure cause the row inser to disappear? How could I
> troubleshoot as I am running out of ideas.
>
> Your help is greatly appreciated.
>
>
> Cheers,
> =Arya
>

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