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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8584) Add strerror output on failed trySkipCache calls
Date Tue, 24 Mar 2015 20:54:53 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14378574#comment-14378574
] 

Benedict commented on CASSANDRA-8584:
-------------------------------------

I'll note it's a preference, and not a terribly strong one, so if you _do_ want to put it
in I won't -1. But I would rather give some thought to logging as a whole if we care about
this kind of issue.

> Add strerror output on failed trySkipCache calls
> ------------------------------------------------
>
>                 Key: CASSANDRA-8584
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8584
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Joshua McKenzie
>            Assignee: Joshua McKenzie
>            Priority: Trivial
>             Fix For: 2.1.4
>
>         Attachments: 8584_v1.txt, NoSpamLogger.java, nospamlogger.txt
>
>
> Since trySkipCache returns an errno rather than -1 and setting errno like our other CLibrary
calls, it's thread-safe and we could print out more helpful information if we failed to prompt
the kernel to skip the page cache.  That system call should always succeed unless we have
an invalid fd as it's free to ignore us.



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