logging-log4j-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Matt Sicker (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1350) Circuit Breaker for log system to avoid DOS by recursion
Date Mon, 04 Apr 2016 14:19:25 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15224212#comment-15224212
] 

Matt Sicker commented on LOG4J2-1350:
-------------------------------------

Is the [burst filter|http://logging.apache.org/log4j/2.x/manual/filters.html#BurstFilter]
helpful in this situation?

> Circuit Breaker for log system to avoid DOS by recursion
> --------------------------------------------------------
>
>                 Key: LOG4J2-1350
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1350
>             Project: Log4j 2
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 2.5
>            Reporter: Steffen Offermann
>
> We have encountered the following situation: A method in an application thread was recursively
calling itself again and again, until the inevitable {{StackOverflowException}} occurred.
Other application threads worked fine, but since we use asynchronous logging, the Log4j ring
buffer ran full because of the thread that was running amok. As a consequence none of the
other threads could issue any log messages any more. 
> In production systems we MUST be able to see log messages, otherwise we have hardly a
means to tell when something goes wrong and to discover problems like this. 
> So my suggestion would be to add a circuit breaker pattern to the Log4j core system (unless
there already is one that I'm not aware of), that would track the frequency of log events
per thread and open once a dangerous threshold has been reached or exceeded. That way other
threads would still be able to send log events once the ring buffer is free again.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: log4j-dev-unsubscribe@logging.apache.org
For additional commands, e-mail: log4j-dev-help@logging.apache.org


Mime
View raw message