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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5986) Cassandra hangs while reading saved cache
Date Mon, 09 Sep 2013 07:54:52 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13761684#comment-13761684
] 

Jonathan Ellis commented on CASSANDRA-5986:
-------------------------------------------

It's probably running out of memory, slowly.  3.5G is a huge cache for a default 8GB heap.
 Definitely recommend cutting the cache size down.
                
> Cassandra hangs while reading saved cache
> -----------------------------------------
>
>                 Key: CASSANDRA-5986
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5986
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: cuser
>             Fix For: 2.0
>
>
> We've got a cluster ~6Tb size running on 5 nodes with vnodes(256) enabled.
> After some cache heat-up one of the nodes was restarted and cassandra just hangs with
no error. Last message:
> cassandra.log:
> ...
>  INFO 11:12:27,649 Opening /cassandra/data/usertable/data/usertable-data-ja-1360 (6273771
bytes)
>  INFO 11:12:27,649 Opening /cassandra/data/usertable/data/usertable-data-ic-1339 (522628274110
bytes)
>  INFO 11:12:49,224 reading saved cache /cassandra/saved_caches/usertable-data-KeyCache-b.db
> system.log:
> ...
>  INFO [SSTableBatchOpen:6] 2013-09-09 11:12:27,649 SSTableReader.java (line 213) Opening
/cassandra/data/usertable/data/usertable-data-ja-1360 (6273771 bytes)
>  INFO [SSTableBatchOpen:7] 2013-09-09 11:12:27,649 SSTableReader.java (line 213) Opening
/cassandra/data/usertable/data/usertable-data-ic-1339 (522628274110 bytes)
>  INFO [CompactionExecutor:1] 2013-09-09 11:12:49,224 AutoSavingCache.java (line 142)
reading saved cache /cassandra/saved_caches/usertable-data-KeyCache-b.db
> usertable-data-KeyCache-b.db size is about 3.5G.
> All other nodes are restarting successfuly.

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