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From Bryan Cheng <br...@blockcypher.com>
Subject Re: Cassandra compaction appears to stall, node becomes partially unresponsive
Date Thu, 23 Jul 2015 01:23:06 GMT
Robert, thanks for these references! We're not using DTCS, so 9056 and 8243
seem out, but I'll take a look at 9577 (also looked at the referenced
thread on this list, which seems to have some interesting data)

On Wed, Jul 22, 2015 at 5:33 PM, Robert Coli <rcoli@eventbrite.com> wrote:

> On Wed, Jul 22, 2015 at 2:55 PM, Bryan Cheng <bryan@blockcypher.com>
> wrote:
>
>> nodetool still reports the node as being healthy, and it does respond to
>> some local queries; however, the CPU is pegged at 100%. One common thread
>> (heh) each time this happens is that there always seems to be one of more
>> compaction threads running (via nodetool tpstats), and some appear to be
>> stuck (active count doesn't change, pending count doesn't decrease). A
>> request for compactionstats hangs with no response.
>>
>
> I've heard other reports of compaction appearing to stall in 2.1.7...
> wondering if you're affected by any of these...
>
> https://issues.apache.org/jira/browse/CASSANDRA-9577
> or
> https://issues.apache.org/jira/browse/CASSANDRA-9056 or
> https://issues.apache.org/jira/browse/CASSANDRA-8243 (these should not be
> in 2.1.7)
>
> =Rob
>
>

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