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https://issues.apache.org/jira/browse/HDFS-3680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427029#comment-13427029
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Marcelo Vanzin commented on HDFS-3680:
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Just to be clear, I don't have any strong opinion over whether the NN should
fail or continue if an access logger fails. I just implemented the "stop
logging on failure" thing because there were comments about third party code
bringing the NN down and that being seen as an HDFS bug. The config route is an
option, but I'm always loth to add more config options unless strictly
necessary.
The only thing I'm against is building a complicated system where we try to, in
some way, "fix" the audit logger (by, let's say, re-instantiating it). I think
that sort of logic belongs in the audit logger implementation itself.
> Allows customized audit logging in HDFS FSNamesystem
> ----------------------------------------------------
>
> Key: HDFS-3680
> URL: https://issues.apache.org/jira/browse/HDFS-3680
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 2.0.0-alpha
> Reporter: Marcelo Vanzin
> Assignee: Marcelo Vanzin
> Priority: Minor
> Attachments: accesslogger-v1.patch, accesslogger-v2.patch,
> hdfs-3680-v3.patch, hdfs-3680-v4.patch, hdfs-3680-v5.patch
>
>
> Currently, FSNamesystem writes audit logs to a logger; that makes it easy to
> get audit logs in some log file. But it makes it kinda tricky to store audit
> logs in any other way (let's say a database), because it would require the
> code to implement a log appender (and thus know what logging system is
> actually being used underneath the façade), and parse the textual log message
> generated by FSNamesystem.
> I'm attaching a patch that introduces a cleaner interface for this use case.
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