hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1112) Edit log buffer should not grow unboundedly
Date Tue, 27 Apr 2010 21:49:32 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861565#action_12861565
] 

Todd Lipcon commented on HDFS-1112:
-----------------------------------

I think so... it's just sort of strange semantics to say that access times are enabled but
don't get updated if the NN is in safe mode. It's almost as if safemode should be called "recovery
mode" or "readonly mode" where these ideas would be more explicit.

> Edit log buffer should not grow unboundedly
> -------------------------------------------
>
>                 Key: HDFS-1112
>                 URL: https://issues.apache.org/jira/browse/HDFS-1112
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Hairong Kuang
>             Fix For: 0.22.0
>
>
> Currently HDFS does not impose an upper limit on the edit log buffer. In case there are
a large number of open operations coming in with access time update on, since open does not
call sync automatically, there is a possibility that the buffer grow to a large size, therefore
causes memory leak and full GC in extreme cases as described in HDFS-1104. 
> The edit log buffer should be automatically flushed when the buffer becomes full.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message