cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From laxmikanth sadula <laxmikanth...@gmail.com>
Subject Re: How long/how many days 'nodetool gossipinfo' will have decommissioned nodes info
Date Mon, 26 Sep 2016 19:17:05 GMT
Thank you @Jaoquin and @DuyHai

On Mon, Sep 26, 2016 at 10:00 PM, DuyHai Doan <doanduyhai@gmail.com> wrote:

> I've read from some <forbidden_doc_link> that the gossip info will stay
> around for 72h before being removed.
>
> On Mon, Sep 26, 2016 at 6:19 PM, Joaquin Casares <
> joaquin@thelastpickle.com> wrote:
>
>> Hello Techpyassa,
>>
>> Sometimes old gossip information tends to echo around for quite a bit
>> longer than intended. I'm unsure how long the LEFT messages are supposed to
>> be echoed for, but if you want to force the removal of a removed node from
>> gossip, you can use the Assassinate Endpoint JMX command. On larger
>> clusters, running this command synchronously across all machines may be
>> required. Instructions on Assassinate Endpoint can be found here:
>>
>> https://gist.github.com/justenwalker/8338334
>>
>> If you're planning on recommissioning the same node, upon bootstrapping
>> the gossiped message should change to a JOINING message overwriting the
>> LEFT message.
>>
>> I've personally never checked `nodetool gossipinfo` before
>> recommissioning a node and typically only ensure the node does not appear
>> in `nodetool status`.
>>
>> Hope that helps,
>>
>> Joaquin Casares
>> Consultant
>> Austin, TX
>>
>> Apache Cassandra Consulting
>> http://www.thelastpickle.com
>>
>> On Sun, Sep 25, 2016 at 2:17 PM, Laxmikanth S <techpyaasa@gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> Recently we have decommissioned nodes from Cassandra cluster , but even
>>> after nearly 48 hours 'nodetool gossipinfo' still shows the removed nodes(
>>> as LEFT).
>>>
>>> I just wanted to recommission the same node again. So just wanted to
>>> know , will it create a problem if I recommission the same node(same IP)
>>>  again while its state is maintained as LEFT in 'nodetool gossipnfo'.
>>>
>>>
>>> Thanks,
>>> Techpyaasa
>>>
>>
>>
>


-- 
Regards,
Laxmikanth
99621 38051

Mime
View raw message