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From Bhuvan Rawal <bhu1ra...@gmail.com>
Subject Re: Getting error while issuing Cassandra stress
Date Fri, 22 Jan 2016 21:07:37 GMT
I had a look at the jira below:
https://issues.apache.org/jira/browse/CASSANDRA-7905

when i opened my cassandra-rackdc.properties i saw that DC names were DC1 &
DC2, rack name was RAC1 . Please note that this is the default
configuration, I have not modified any file.

There is another point of concern here which might be relevant to previous
one as well, im not able to login to cqlsh directly, i.e. I have to specify
ip as well even when im logged in to that machine.

$ cqlsh
Connection error: ('Unable to connect to any servers', {'127.0.0.1':
error(111, "Tried connecting to [('127.0.0.1', 9042)]. Last error:
Connection refused")})

whereas
$ cqlsh <ip>
works fine

is that the reason why the cassandra-stress is not able to communicate with
other replicas?

On Sat, Jan 23, 2016 at 1:37 AM, Sebastian Estevez <
sebastian.estevez@datastax.com> wrote:

> Sorry I missed that.
>
> Both your nodetool status and keyspace replication settings say Cassandra
> and Analytics for the DC names. I'm not sure where you're seeing DC1, DC2,
> etc. and why you suspect that is the problem.
>
> All the best,
>
>
> [image: datastax_logo.png] <http://www.datastax.com/>
>
> Sebastián Estévez
>
> Solutions Architect | 954 905 8615 | sebastian.estevez@datastax.com
>
> [image: linkedin.png] <https://www.linkedin.com/company/datastax> [image:
> facebook.png] <https://www.facebook.com/datastax> [image: twitter.png]
> <https://twitter.com/datastax> [image: g+.png]
> <https://plus.google.com/+Datastax/about>
> <http://feeds.feedburner.com/datastax>
> <http://goog_410786983>
>
>
> <http://www.datastax.com/gartner-magic-quadrant-odbms>
>
> DataStax is the fastest, most scalable distributed database technology,
> delivering Apache Cassandra to the world’s most innovative enterprises.
> Datastax is built to be agile, always-on, and predictably scalable to any
> size. With more than 500 customers in 45 countries, DataStax is the
> database technology and transactional backbone of choice for the worlds
> most innovative companies such as Netflix, Adobe, Intuit, and eBay.
>
> On Fri, Jan 22, 2016 at 1:45 PM, Bhuvan Rawal <bhu1rawal@gmail.com> wrote:
>
>> Hi Sebastian,
>>
>> I had attached nodetool status output in previous mail, pasting it again :
>>
>> $ nodetool status Datacenter: Analytics =====================
>> Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load
>> Tokens Owns Host ID Rack UN 10.41.55.17 428.5 KB 256 ?
>> 39d6d585-e641-4046-9d0b-797356597b5e rack1 UN 10.41.55.19 404.44 KB 256 ?
>> 69edf930-efd9-4d74-a798-f3d4ac02e516 rack1 UN 10.41.55.18 423.21 KB 256 ?
>> b74bab13-09b2-4760-bce9-c8ef05e50f6d rack1 UN 10.41.55.20 683.23 KB 256 ?
>> fb5c4fed-6e1e-4ea8-838d-358106906830 rack1 Datacenter: Cassandra
>> ===================== Status=Up/Down |/
>> State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns Host ID
>> Rack UN 10.41.55.15 209.4 KB 256 ? ffc3b9a0-5d5c-4a3d-a99e-49d255731278
>> rack1 UN 10.41.55.21 227.44 KB 256 ? c68deba4-b9a2-43fc-bb13-6af74c88c210
>> rack1 UN 10.41.55.23 222.71 KB 256 ? 8229aa87-af00-48fa-ad6b-3066d3dc0e58
>> rack1 UN 10.41.55.22 218.72 KB 256 ? c7ba84fd-7992-41de-8c88-11574a72db99
>> rack1
>>
>> Regards,
>> Bhuvan Rawal
>>
>> On Sat, Jan 23, 2016 at 12:11 AM, Sebastian Estevez <
>> sebastian.estevez@datastax.com> wrote:
>>
>>> The output of `nodetool status` would help us diagnose.
>>>
>>> All the best,
>>>
>>>
>>> [image: datastax_logo.png] <http://www.datastax.com/>
>>>
>>> Sebastián Estévez
>>>
>>> Solutions Architect | 954 905 8615 | sebastian.estevez@datastax.com
>>>
>>> [image: linkedin.png] <https://www.linkedin.com/company/datastax> [image:
>>> facebook.png] <https://www.facebook.com/datastax> [image: twitter.png]
>>> <https://twitter.com/datastax> [image: g+.png]
>>> <https://plus.google.com/+Datastax/about>
>>> <http://feeds.feedburner.com/datastax>
>>> <http://goog_410786983>
>>>
>>>
>>> <http://www.datastax.com/gartner-magic-quadrant-odbms>
>>>
>>> DataStax is the fastest, most scalable distributed database technology,
>>> delivering Apache Cassandra to the world’s most innovative enterprises.
>>> Datastax is built to be agile, always-on, and predictably scalable to any
>>> size. With more than 500 customers in 45 countries, DataStax is the
>>> database technology and transactional backbone of choice for the worlds
>>> most innovative companies such as Netflix, Adobe, Intuit, and eBay.
>>>
>>> On Fri, Jan 22, 2016 at 1:39 PM, Bhuvan Rawal <bhu1rawal@gmail.com>
>>> wrote:
>>>
>>>> Thanks for the response Alain,
>>>>
>>>> cqlsh> create keyspace mykeyspace WITH replication =
>>>> {'class':'NetworkTopologyStrategy', 'Analytics':2, 'Cassandra':3}
>>>> cqlsh> use mykeyspace;
>>>> cqlsh:mykeyspace>create table mytable (id int primary key, name text,
>>>> address text, phone text);
>>>> cqlsh:mykeyspace> insert into mytable (id, name, address, phone) values
>>>> (1, 'Kiyu','Texas', '555-1212'); # and other similar statement
>>>> I then issued the below command from every node and found consistent
>>>> results.
>>>> cqlsh:mykeyspace> select * from mytable;
>>>>
>>>> // Then i repeated the above steps for NetworkTopologyStrategy and
>>>> found same results
>>>>
>>>> I ran basic cassandra stress
>>>> seed1 - seed of datacenter 1
>>>>  $ cassandra-stress write n=50000 -rate threads=4 -node any_random_ip
>>>>  $ cassandra-stress write n=50000 -rate threads=4 -node seed1
>>>>  $ cassandra-stress write n=50000 -rate threads=4 -node seed1,seed2
>>>>  $ cassandra-stress write n=50000 -rate threads=4 -node
>>>> all_8_ip_comma_seperated
>>>>  $ cassandra-stress write n=1000000 cl=one -mode native cql3 -schema
>>>> keyspace="keyspace1" -pop seq=1..1000000 -node ip1,ip2,ip3,ip4
>>>>
>>>> All of them threw the exception
>>>> *com.datastax.driver.core.exceptions.UnavailableException: Not enough
>>>> replica available for query at consistency LOCAL_ONE (1 required but only
0
>>>> alive)*
>>>>
>>>>
>>>> I have a feeling that the issue is with datacenter name for some
>>>> reason, because in some config files I found DC name to be like DC1/DC2/DC3
>>>> in some it is like Cassandra/Analytics (The ones I had specified while
>>>> installation). Im unsure which yaml/property file to look for correct
>>>> inconsistency.
>>>>
>>>> (C*heers :) - im so tempted to copy that)
>>>>
>>>> Regards,
>>>> Bhuvan
>>>>
>>>> On Fri, Jan 22, 2016 at 8:47 PM, Alain RODRIGUEZ <arodrime@gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> The the exact command you ran (stress-tool with options) could be
>>>>> useful to help you on that.
>>>>>
>>>>> However, Im able to create keyspace, tables and insert data using
>>>>>> cqlsh and it is replicating fine to all the nodes.
>>>>>
>>>>>
>>>>> Having the schema might be useful too.
>>>>>
>>>>> Did you ran the cqlsh and the stress-tool from the same server ? If
>>>>> not, you might want to check the port you use (9042/9160/...) are open.
>>>>> Also, cqlsh uses local_one by default too. If both commands were run
>>>>> against the same DC, from the same machine they should behave the same
way.
>>>>> Are they ?
>>>>>
>>>>> C*heers,
>>>>>
>>>>> -----------------
>>>>> Alain
>>>>>
>>>>> The Last Pickle
>>>>> http://www.thelastpickle.com
>>>>>
>>>>>
>>>>> 2016-01-22 9:57 GMT+01:00 Bhuvan Rawal <bhu1rawal@gmail.com>:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> i have created a POC cluster with 2 DC , each having 4 nodes with
DSE
>>>>>> 4.8.1 installed.
>>>>>>
>>>>>> On issuing cassandra stress im getting an error  and data is not
>>>>>> being inserted:
>>>>>> *com.datastax.driver.core.exceptions.UnavailableException: Not enough
>>>>>> replica available for query at consistency LOCAL_ONE (1 required
but only 0
>>>>>> alive)*
>>>>>>
>>>>>> However, Im able to create keyspace, tables and insert data using
>>>>>> cqlsh and it is replicating fine to all the nodes.
>>>>>>
>>>>>> Details of the cluster can be found below (all the nodes seem to
be
>>>>>> alive and kicking):
>>>>>>
>>>>>> $ nodetool status Datacenter: Analytics =====================
>>>>>> Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address
>>>>>> Load Tokens Owns Host ID Rack UN 10.41.55.17 428.5 KB 256 ?
>>>>>> 39d6d585-e641-4046-9d0b-797356597b5e rack1 UN 10.41.55.19 404.44
KB 256 ?
>>>>>> 69edf930-efd9-4d74-a798-f3d4ac02e516 rack1 UN 10.41.55.18 423.21
KB 256 ?
>>>>>> b74bab13-09b2-4760-bce9-c8ef05e50f6d rack1 UN 10.41.55.20 683.23
KB 256 ?
>>>>>> fb5c4fed-6e1e-4ea8-838d-358106906830 rack1 Datacenter: Cassandra
>>>>>> ===================== Status=Up/Down |/
>>>>>> State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns Host
>>>>>> ID Rack UN 10.41.55.15 209.4 KB 256 ? ffc3b9a0-5d5c-4a3d-a99e-49d255731278
>>>>>> rack1 UN 10.41.55.21 227.44 KB 256 ? c68deba4-b9a2-43fc-bb13-6af74c88c210
>>>>>> rack1 UN 10.41.55.23 222.71 KB 256 ? 8229aa87-af00-48fa-ad6b-3066d3dc0e58
>>>>>> rack1 UN 10.41.55.22 218.72 KB 256 ? c7ba84fd-7992-41de-8c88-11574a72db99
>>>>>> rack1
>>>>>>
>>>>>> Regards,
>>>>>> Bhuvan Rawal
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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