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From Thomas Stets <>
Subject Re: Losing keyspace on cassandra upgrade
Date Thu, 20 Sep 2012 11:41:41 GMT
A follow-up:

Currently I'm back on version 1.1.1.

I tried - unsuccessfully - the following things:

1. Create the missing keyspace on the 1.1.5 node, then copy the files back
into the data directory.
This failed, since the keyspace was already known on the other node in the

2. shut down the 1.1.1 node, that still has the keyspace. Then create the
keyspace on the 1.1.5 node.
This failes since the node could not distribute the information through the

3. Restore the system keyspace from the snapshot I made before the upgrade.
The restore seemed to work, but the node behaved just like after the
update: it just forgot my keyspace.

Right now I'm at a loss on how to proceed. Any ideas? I'm pretty sure I can
reproduce the problem,
so if anyone has an idea on what to try, or where to look, I can do some
tests (within limits)

On Wed, Sep 19, 2012 at 4:43 PM, Thomas Stets <>wrote:

> I consistently keep losing my keyspace on upgrading from cassandra 1.1.1
> to 1.1.5
> I have the same cassandra keyspace on all our staging systems:
> development:  a 3-node cluster
> integration: a 3-node cluster
> QS: a 2-node cluster
> (productive will be a 4-node cluster, which is as yet not active)
> All clusters were running cassandra 1.1.1. Before going productive I
> wanted to upgrade to the
> latest productive version of cassandra.
> In all cases my keyspace disappeared when I started the cluster with
> cassandra 1.1.5.
> On the development system I didn't realize at first what was happening. I
> just wondered that nodetool
> showed a very low amount of data. On integration I saw the problem
> quickly, but could not recover the
> data. I re-installed the cassandra cluster from scratch, and populated it
> with our test data, so our
> developers could work.

>   TIA, Thomas

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