[logback-dev] [JIRA] Issue Comment Edited: (LBCLASSIC-265) Logging stops if invalid xml configuration is loaded by scanner

[Ceki Gulcu (JIRA)]

    [ http://jira.qos.ch/browse/LBCLASSIC-265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12038#action_12038 ] 

Ceki Gulcu edited comment on LBCLASSIC-265 at 6/16/11 4:06 PM:
---------------------------------------------------------------

There might be undesirable side effects even when running joran on a temporary context. For example, a RollingFileAppender might open/close an existing file as a result of running a config file. 

Another strategy is to memorize a safe configuration script  (as a DOM tree) and fallback to it if the current configuration file turns out to be bogus. However, *correctly* determining that a configuration file is bogus or alternatively safe can be rather difficult. 

Note that any retained strategy must work correctly in presence of inclusions, i.e. the <include> directive.

      was (Author: noreply.ceki at qos.ch):
    There might be undesirable side effects even when running joran a temporary context. For example, a RollingFileAppender might open/close an existing file as a result of running a config file. Another strategy is to memorize a safe configuration script  and fallback to it if the current configuration file is bogus. However, *correctly* determining that a configuration file is bogus or alternatively safe can be rather difficult.
  
> Logging stops if invalid xml configuration is loaded by scanner
> ---------------------------------------------------------------
>
>                 Key: LBCLASSIC-265
>                 URL: http://jira.qos.ch/browse/LBCLASSIC-265
>             Project: logback-classic
>          Issue Type: Bug
>    Affects Versions: 0.9.28
>            Reporter: Iwein Fuld
>            Assignee: Ceki Gulcu
>
> When logging with scan="true" it is possible to stop all logging of an application silently.
> Steps to reproduce:
> - start an application with valid configuration and scan=true
> - break the logback.xml (leave out a quote or something)
> -> log goes silent
> Expected behavior:
> Logger fails to load new config and keeps running on the old configuration (like when valid xml, but invalid configuration is loaded).

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