[
https://issues.apache.org/jira/browse/RANGER-1501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15963867#comment-15963867
]
Yan commented on RANGER-1501:
-----------------------------
The failure to call close() was experienced by Solr Plugin as reported in
Ranger-1502. In general, the shutdown hook call might not be guaranteed by a
hosting application. In addition, the flush() call to HDFS did not cause the
audit logs visible on HDFS as expected. I do not test the scenario of NN going
down.
> Audit Flush to HDFS does not actually cause the audit logs to be flushed to
> HDFS
> ---------------------------------------------------------------------------------
>
> Key: RANGER-1501
> URL: https://issues.apache.org/jira/browse/RANGER-1501
> Project: Ranger
> Issue Type: Bug
> Components: audit
> Affects Versions: 0.7.0
> Reporter: Yan
> Assignee: Yan
> Fix For: master
>
> Attachments:
> 0001-RANGER-1501-Audit-Flush-to-HDFS-does-not-actually-ca.patch
>
>
> The reason is that HDFS file stream's flush() call does not really flush the
> data all the way to disk, nor even makes the data visible to HDFS users. See
> the HDFS semantics of the flush/sync at
> https://issues.apache.org/jira/browse/HADOOP-6313.
> Consequently the audit logs on HDFS won't be visible/durable from HDFS client
> until the log file is closed. This will, among other issues, boost chances of
> losing audit logs in case of system failure.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
