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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (CASSANDRA-10285) Compaction running indefinitely on system.hints
Date Wed, 16 Sep 2015 06:36:45 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-10285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marcus Eriksson reassigned CASSANDRA-10285:
-------------------------------------------

    Assignee: Marcus Eriksson

> Compaction running indefinitely on system.hints 
> ------------------------------------------------
>
>                 Key: CASSANDRA-10285
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10285
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Alan Boudreault
>            Assignee: Marcus Eriksson
>
> During my hints storage benchmarks, I've experienced an issue using C* 2.2. The hints
was never replayed. After a while (more than 24H ...), I noticed that there were still compactions
running on system.hints and that some new ones was triggered every 10-20 minutes.
> To reproduce, we create a cluster of 2 nodes. RF=2 and we generate hints by shutting
down the node2.
> {code}
> ccm create --install-dir=`pwd` -n 2 local && ccm start
> ccm node1 stress -- write n=50M -rate threads=300 -port jmx=7198 -errors ignore -schema
replication\(factor=2\)
> # wait 5-6 seconds to get the schema creation propagated on all nodes, then in another
window, stop node 2
> ccm node2 stop
> # wait the initial 50M writes are finished, bring back node2 up and write another 50M
keys.
> ccm node2 start
> ccm node1 stress -- write n=50M -rate threads=300 -port jmx=7198 -errors ignore -schema
replication\(factor=2\)
> # You should get the initial compaction finished after 15-20 minutes. You can set the
mb throughput to 0 to get that done faster. 
> # Monitor the node1. the hints will never be replayed and you should see compactions
happening indefinitely. 
> {code}
> //cc [~krummas] [~yukim]



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