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Posted to log4j-dev@logging.apache.org by "Scott Severtson (JIRA)" <ji...@apache.org> on 2013/01/14 15:10:13 UTC
[jira] [Commented] (LOG4J2-149) SMTPManager buffer access not
synchronized; can result in empty emails
[ https://issues.apache.org/jira/browse/LOG4J2-149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13552667#comment-13552667 ]
Scott Severtson commented on LOG4J2-149:
----------------------------------------
BTW, this issue is *not* hypothetical - we experienced this twice today on a highly-threaded component of our software.
> SMTPManager buffer access not synchronized; can result in empty emails
> ----------------------------------------------------------------------
>
> Key: LOG4J2-149
> URL: https://issues.apache.org/jira/browse/LOG4J2-149
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-beta4
> Environment: N/A
> Reporter: Scott Severtson
> Attachments: SMTPManager-buffer-synchronization.patch
>
>
> If multiple error events are logged against the same SMTPAppender/Manager at the same time, one email will contain both error messages, while the second will be empty (no events).
> The original SMTPAppender patch included synchronization against the CyclicBuffer to prevent such simultaneous access from multiple threads. This appears to have been lost in the merge/refactor. Patch (to follow shortly) re-introduces synchronization against the CyclicBuffer in the narrowest possible scope.
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