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From Ishan Thilina <is...@ishans.info>
Subject Re: Stream definition is lost after server restart
Date Tue, 18 Sep 2012 04:11:27 GMT
Sorry,

Forgot to mention that I'm using Cassandra 1.1.3
--
Thank you..!
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Ishan's info: www.ishans.info
මගේ සටහන්: www.siblog.ishans.info
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On Mon, Sep 17, 2012 at 9:32 PM, Ishan Thilina <ishan@ishans.info> wrote:

> Hi all,
>
> I am currently working on a project which uses Cassandra. I have a task
> running in my server which will periodically look at a certain set of
> pre-defined data (of the server) and writes them to Cassandra. The
> procedure for this work is as follows.
>
> 1. I give a name and a version to the task.
>
> 2. I configure what data should the task monitor.
>
> 3. The task will then look if a stream definition exists for the task
> using the task name and its version.
>
> 4. If a definition does not exist, then the task will create a definition
> (By looking at the types of data to be monitored).
>
> 5. Then (or if a stream definition exists) the task will write the data to
> Cassandra
>
> 6. The task will repeat the steps 3 to 5 forever (even after server
> restart).
>
>
> Please note that there can be multiple tasks like this monitoring
> different sets of data.
>
>
> The problem occurs when the server is used for few days and when several
> (around 100) stream definitions are created, I have observed that after the
> server is restarted, a stream definition does not exist exception is thrown
> in the step 3. I manually checked and the stream definition actually exists.
>
> When a new server is used (with a clean Cassandra server), then everything
> works fine for few days. But most of the time after a few days, the same
> issue arises.
>
> Has anyone experienced this..?
>
>
>
> --
> Thank you..!
> ---------------------------------------------------------------------
> 071-6372089
>
> Ishan's info: www.ishans.info
> මගේ සටහන්: www.siblog.ishans.info
> Ishan's way: www.blog.ishans.info
> ---------------------------------------------------------------------
>
>

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