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From George Sigletos <sigle...@textkernel.nl>
Subject Re: Inconsistent data after adding a new DC and rebuilding
Date Mon, 10 Apr 2017 17:12:25 GMT
In 3 out of 5 nodes of our new DC the rebuild process finished
successfully. In the other two nodes not (the process was hanging doing
nothing) so we killed it, removed all data and started again. This time
finished successfully.

Here is the netstats output of one of the new newly added nodes:

Mode: NORMAL
Not sending any streams.
Read Repair Statistics:
Attempted: 269142
Mismatch (Blocking): 169866
Mismatch (Background): 4
Pool Name                    Active   Pending      Completed   Dropped
Commands                        n/a         2       10031126      1935
Responses                       n/a        97       22565129       n/a


On Mon, Apr 10, 2017 at 5:28 PM, Roland Otta <Roland.Otta@willhaben.at>
wrote:

> Hi,
>
> we have seen similar issues here.
>
> have you verified that your rebuilds have been finished successfully? we
> have seen rebuilds that stopped streaming and working but have not finished.
> what does nodetool netstats output for your newly built up nodes?
>
> br,
> roland
>
>
> On Mon, 2017-04-10 at 17:15 +0200, George Sigletos wrote:
>
> Hello,
>
> We recently added a new datacenter to our cluster and run "nodetool
> rebuild -- <DC_current>" in all 5 new nodes, one by one.
>
> After this process finished we noticed there is data missing from the new
> datacenter, although it exists on the current one.
>
> How would that be possible? Should I maybe have run repair in all nodes of
> the current DC before adding the new one?
>
> Running Cassandra 2.1.15
>
> Kind regards,
> George
>
>
>
>

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