Enabling internal status messages is usually helpful. See http://logback.qos.ch/manual/configuration.html#automaticStatusPrinting On 11.02.2014 15:49, Johny Johnson wrote:
Yeah, the NPE occurs because rollingPolicy is null in the getFile call (triggeringPolicy is also null at this point) but can't seem to figure out why rollingPolicy isn't getting set. If I'm extending the RollingFileAppender do I need to and programmatically set everything it checks for in start() manually (vs. getting it from logback.xml)?
Johny
------------------------------------------------------------------------ *From:* Logback-user <logback-user-bounces@qos.ch> on behalf of David Roussel <nabble@diroussel.xsmail.com> *Sent:* Tuesday, February 11, 2014 3:18 AM *To:* logback users list *Subject:* Re: [logback-user] NPE when extending RollingFileAppender
Did you try stepping through with a debugger to see what was going on?
David
On 10 Feb 2014, at 20:07, Johny Johnson <johny.johnson@apx-labs.com <mailto:johny.johnson@apx-labs.com>> wrote:
Hi,
I'm having some trouble getting my custom appender which extends RollingFileAppender working. I've got my logback config being read and can extend FileAppender w/o issues but when I switch over to RollingFileAppender, I get the following: java.lang.NullPointerException: null at ch.qos.logback.core.rolling.RollingFileAppender.getFile(RollingFileAppender.java:122) ~[org.apache.sling.commons.log:4.0.0]
Here is my config: <appender name="CUSTOM" class="com.mypackage.logging.CustomLogAppender"> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>log.%d{yyyy-MM-dd}.log</fileNamePattern> </rollingPolicy> <prudent>true</prudent> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %logger{36} - %msg%n</pattern> </encoder> </appender>
The only method that I override is writeout() as I needed to handle some particular events. Did I missing something obvious in terms of configuration? Any help is appreciated.
Thanks!
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