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http://jira.qos.ch/browse/LBCLASSIC-74?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=10832#action_10832
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Ceki Gulcu commented on LBCLASSIC-74:
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I can reproduce the following exception, under Tomcat 5.0.26 and Tomcat 6.0.18.
java.lang.NullPointerException
ch.qos.logback.classic.Logger.callTurboFilters(Logger.java:791)
ch.qos.logback.classic.Logger.isDebugEnabled(Logger.java:646)
ch.qos.logback.classic.Logger.isDebugEnabled(Logger.java:629)
test.LogbackTest.testLogger(LogbackTest.java:15)
org.apache.jsp.index_jsp._jspService(index_jsp.java:60)
After a little analysis, I think the problem is due to the fact that Tomcat
saves the session, and when the application
restarts, it deserializes the LoggerTest object which contains a field
referencing a logger. However, this field does not
contain a valid reference to a LoggerContext.
Problem is solved in revision 1897.
> NullPointerException in Logger after container restart
> ------------------------------------------------------
>
> Key: LBCLASSIC-74
> URL: http://jira.qos.ch/browse/LBCLASSIC-74
> Project: logback-classic
> Issue Type: Bug
> Affects Versions: 0.9.9
> Environment: Eclipse 3.4, Java 5, Tomcat 5.5.26, plain JSP (no
> servlet)
> Reporter: Manel Clos
> Assignee: Ceki Gulcu
> Priority: Critical
> Fix For: 0.9.12
>
> Attachments: minimalwebapp.zip
>
>
> Hi,
> loggerContext in the Logger class is null after container restart. This will
> produce a NPE when trying to further use logback.
> java.lang.NullPointerException
> at ch.qos.logback.classic.Logger.callTurboFilters(Logger.java:775)
> at ch.qos.logback.classic.Logger.isDebugEnabled(Logger.java:630)
> at ch.qos.logback.classic.Logger.isDebugEnabled(Logger.java:613)
> at test.LogbackTest.testLogger(LogbackTest.java:15)
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