ok, I have restarted the cluster to stop all repairs.
There is no "migration" process to move to incremental repair in 3.11?
So I can start "nodetool repair -pr"  node after node or just "nodetool
repair" on one node?

 Cheers,
 Michael


On 14.09.2017 10:47, Alexander Dejanovski wrote:
> Hi Micha,
> 
> Are you running incremental repair ?
> If so, then validation fails when 2 repair sessions are running at the same
> time, with one anticompacting an SSTable and the other trying to run a
> validation compaction on it.
> 
> If you check the logs of the nodes that is referred to in the "Validation
> failed in ...", you should see that there are error messages stating that
> an sstable can't be part of 2 different repair sessions.
> 
> If that happens (and you're indeed running incremental repair), you should
> roll restart the cluster to stop all repairs and then process one node at a
> time only.
> Reaper does that, but you can handle it manually if you prefer. The plan
> here is to wait for all anticompactions to be over before starting a repair
> on the next node.
> 
> In any case, check the logs of the node that failed to run validation
> compaction in order to understand what failed.
> 
> Cheers,
> 
> On Thu, Sep 14, 2017 at 10:18 AM Micha <mich...@fantasymail.de> wrote:
> 
>> Hi,
>>
>> I started a repair (7 nodes, C* 3.11) but at once I get an exception in
>> the log:
>> "RepairException: [#.... on keyspace/table, [....],
>>  Validation failed in /ip"
>>
>> The started nodetool repair hangs (the whole day...), strace shows it's
>> waiting...
>>
>> What's the reason for this excpetion and what to do now? If this is an
>> error, why doesn't nodetool abort the command and shows the error?
>>
>> thanks,
>>  Michael
>>
>>
>>
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>> --
> -----------------
> Alexander Dejanovski
> France
> @alexanderdeja
> 
> Consultant
> Apache Cassandra Consulting
> http://www.thelastpickle.com
> 

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