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From A J <s5a...@gmail.com>
Subject Re: EC2 - 2 regions
Date Fri, 18 Mar 2011 17:20:13 GMT
Thats exactly what I am doing.

I was able to do the first two scenarios without any issues (i.e. 2
nodes in same availability zone. Followed by an additional node in a
different zone but same region)

I am stuck at the third scenario of separate regions.

(I did read the "Cassandra nodes on EC2 in two different regions not
communicating" thread but it did not seem to end with resolution)


On Fri, Mar 18, 2011 at 1:15 PM, Dave Viner <daveviner@gmail.com> wrote:
> Hi AJ,
> I'd suggest getting to a multi-region cluster step-by-step.  First, get 2
> nodes running in the same availability zone.  Make sure that works properly.
>  Second, add a node in a separate availability zone, but in the same region.
>  Make sure that's working properly.  Third, add a node that's in a separate
> region.
> Taking it step-by-step will ensure that any issues are specific to the
> region-to-region communication, rather than intra-zone connectivity or
> cassandra cluster configuration.
> Dave Viner
>
> On Fri, Mar 18, 2011 at 8:34 AM, A J <s5alye@gmail.com> wrote:
>>
>> Hello,
>>
>> I am trying to setup a cassandra cluster across regions.
>> For testing I am keeping it simple and just having one node in US-EAST
>> (say ec2-1-2-3-4.compute-1.amazonaws.com) and one node in US-WEST (say
>> ec2-2-2-3-4.us-west-1.compute.amazonaws.com).
>> Using Cassandra 0.7.4
>>
>>
>> The one in east region is the seed node and has the values as:
>> auto_bootstrap: false
>> seeds: ec2-1-2-3-4.compute-1.amazonaws.com
>> listen_address: ec2-1-2-3-4.compute-1.amazonaws.com
>> rpc_address: 0.0.0.0
>>
>> The one in west region is non seed and has the values as:
>> auto_bootstrap: true
>> seeds: ec2-1-2-3-4.compute-1.amazonaws.com
>> listen_address: ec2-2-2-3-4.us-west-1.compute.amazonaws.com
>> rpc_address: 0.0.0.0
>>
>> I first fire the seed node (east region instance) and it comes up
>> without issues.
>> When I fire the non-seed node (west region instance) it fails after
>> sometime with the error:
>>
>> DEBUG 15:09:08,844 Created HHOM instance, registered MBean.
>>  INFO 15:09:08,844 Joining: getting load information
>>  INFO 15:09:08,845 Sleeping 90000 ms to wait for load information...
>> DEBUG 15:09:09,822 attempting to connect to
>> ec2-1-2-3-4.compute-1.amazonaws.com/1.2.3.4
>> DEBUG 15:09:10,825 Disseminating load info ...
>> DEBUG 15:10:10,826 Disseminating load info ...
>> DEBUG 15:10:38,845 ... got load info
>>  INFO 15:10:38,845 Joining: getting bootstrap token
>> ERROR 15:10:38,847 Exception encountered during startup.
>> java.lang.RuntimeException: No other nodes seen!  Unable to bootstrap
>>        at
>> org.apache.cassandra.dht.BootStrapper.getBootstrapSource(BootStrapper.java:164)
>>        at
>> org.apache.cassandra.dht.BootStrapper.getBalancedToken(BootStrapper.java:146)
>>        at
>> org.apache.cassandra.dht.BootStrapper.getBootstrapToken(BootStrapper.java:141)
>>        at
>> org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:450)
>>        at
>> org.apache.cassandra.service.StorageService.initServer(StorageService.java:404)
>>        at
>> org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:192)
>>        at
>> org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:314)
>>        at
>> org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:79)
>>
>>
>> The seed node seems to somewhat acknowledge the non-seed node:
>> attempting to connect to /2.2.3.4
>> attempting to connect to /10.170.190.31
>>
>> Can you suggest how can I fix it (I did see a few threads on similar
>> issue but did not really follow the chain)
>>
>> Thanks, AJ
>
>

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