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From Chuan-Heng Hsiao <hsiao.chuanh...@gmail.com>
Subject Re: continue seeing "Finished hinted handoff of 0 rows to endpoint"
Date Sun, 25 Nov 2012 04:01:56 GMT
Hi Mike and Cassandra Devs,

It seems like the reason was because I was trying to
cleanup 2 CFs at the same time.

The scrub command successfully snapshoot HintsColumnFamily,
but seems hanged also (maybe because I did not stop cleanup.)

I ended up restarting the node, and redoing the cleanup one-CF-by-one-CF.
Now everything seems fine.

Sincerely,
Hsiao


On Sun, Nov 25, 2012 at 1:55 AM, Michael Kjellman
<mkjellman@barracuda.com> wrote:
> Sorry, auto correct changed 'myself' to 'mysql'. Sorry for the confusion...
>
> On Nov 24, 2012, at 9:29 AM, "Michael Kjellman" <mkjellman@barracuda.com> wrote:
>
>> Some people (myself included) have seen issues when upgrading from 1.1.2
>> to 1.1.6 with tombstoned rows in the HintsColumnFamily
>>
>> Some (mysql included) have fixed this by doing a
>>
>> nodetool scrub system HintsColumnFamily
>> -mike
>>
>> On 11/24/12 7:37 AM, "Chuan-Heng Hsiao" <hsiao.chuanheng@gmail.com> wrote:
>>
>>> Hi Cassandra Devs,
>>>
>>> I intended to reduce the size of the db by the following steps:
>>>
>>> 1. removing all keys from one cf (somehow I can get all keys from the cf).
>>> 2. run nodetool cleanup on that cf one-node-by-one-node.
>>>
>>> the size of the cf on one node is about 150 G,
>>> I've made another cf with the same data of that cf,
>>> and the new cf is only about 70G. It's the main reason
>>> why I want to remove the data in the original cf.
>>>
>>> The reason that I did not directly remove the cf is because it seems
>>> not good to
>>> change the schema after inserting a lot of data.
>>>
>>> However, I continue seeing the following in /var/log/cassandra/system.log
>>>
>>> INFO [HintedHandoff:1] 2012-11-24 22:58:28,088
>>> HintedHandOffManager.java (line 296) Started hinted handoff for token:
>>> 27949589543905115548813332729343195104 with IP: /192.168.0.10
>>> INFO [HintedHandoff:1] 2012-11-24 22:58:28,089
>>> HintedHandOffManager.java (line 392) Finished hinted handoff of 0 rows
>>> to endpoint /192.168.0.10
>>>
>>> every ten mins.
>>> (It seems fall into some infinite loop.)
>>>
>>> I am wondering whether it is really some infinite loop?
>>> Or it is just dealing with a lot of tombstone data?
>>>
>>> Sincerely,
>>> Hsiao
>>
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