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From "Brandon Williams (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4022) Compaction of hints can get stuck in a loop
Date Thu, 08 Mar 2012 18:11:57 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13225350#comment-13225350
] 

Brandon Williams commented on CASSANDRA-4022:
---------------------------------------------

Yuki mentions that it may be caused by CASSANDRA-3442 too.
                
> Compaction of hints can get stuck in a loop
> -------------------------------------------
>
>                 Key: CASSANDRA-4022
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4022
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>            Priority: Critical
>             Fix For: 1.1.0
>
>
> Not exactly sure how I caused this as I was working on something else in trunk, but:
> {noformat}
>  INFO 17:41:35,682 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-339-Data.db')]
>  INFO 17:41:36,430 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-340-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 5.912220MB/s.  Time: 748ms.
>  INFO 17:41:36,431 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-340-Data.db')]
>  INFO 17:41:37,238 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-341-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 5.479976MB/s.  Time: 807ms.
>  INFO 17:41:37,239 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-341-Data.db')]
>  INFO 17:41:38,163 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-342-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 4.786083MB/s.  Time: 924ms.
>  INFO 17:41:38,164 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-342-Data.db')]
>  INFO 17:41:39,014 GC for ParNew: 274 ms for 1 collections, 541261288 used; max is 1024458752
>  INFO 17:41:39,151 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-343-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 4.485132MB/s.  Time: 986ms.
>  INFO 17:41:39,151 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-343-Data.db')]
>  INFO 17:41:40,016 GC for ParNew: 308 ms for 1 collections, 585582200 used; max is 1024458752
>  INFO 17:41:40,200 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-344-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 4.223821MB/s.  Time: 1,047ms.
>  INFO 17:41:40,201 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-344-Data.db')]
>  INFO 17:41:41,017 GC for ParNew: 252 ms for 1 collections, 617877904 used; max is 1024458752
>  INFO 17:41:41,178 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-345-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 4.526449MB/s.  Time: 977ms.
>  INFO 17:41:41,179 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-345-Data.db')]
>  INFO 17:41:41,885 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-346-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes 
> for 1 keys at 6.263938MB/s.  Time: 706ms.
>  INFO 17:41:41,887 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-346-Data.db')]
>  INFO 17:41:42,617 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-347-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes for 1 keys at 6.066311MB/s.  Time: 729ms.
>  INFO 17:41:42,618 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-347-Data.db')]
>  INFO 17:41:43,376 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-348-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes for 1 keys at 5.834222MB/s.  Time: 758ms.
>  INFO 17:41:43,377 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-348-Data.db')]
>  INFO 17:41:44,307 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-349-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes for 1 keys at 4.760323MB/s.  Time: 929ms.
>  INFO 17:41:44,308 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-349-Data.db')]
>  INFO 17:41:45,021 GC for ParNew: 245 ms for 1 collections, 731287832 used; max is 1024458752
>  INFO 17:41:45,316 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-350-Data.db,].
 4,637,160 to 4,637,160 (~100% of original) bytes for 1 keys at 4.395965MB/s.  Time: 1,006ms.
>  INFO 17:41:45,316 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-350-Data.db')]
>  INFO 17:41:46,022 GC for ParNew: 353 ms for 1 collections, 757476872 used; max is 1024458752
>  INFO 17:41:46,451 Compacted to [/var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-351-Data.db,].
 4,637,160 to 4,637
> {noformat}
> I suspect we broke something subtle in CASSANDRA-3955.

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