Hi,
I'm new to Log4j. I've written a simple custom Appender which extends FileAppender.
I'm getting the following error while the DOMConfigurator parses my XML configuration
file. Could anybody tell me where I'm wrong.
Would highly appreciate your timely response.
log4j: Class name: [MyAppender]
log4j:ERROR Could not create an Appender. Reported error follows.
java.lang.InstantiationException: MyAppender
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Unknown Source)
at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.ja
va:164)
at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurat
or.java:140)
at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfi
gurator.java:153)
at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOM
Configurator.java:415)
at org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.ja
va:335)
at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:788)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:673)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:616)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:584)
at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:6
94)
at MyLoggerTest.main(MyLoggerTest.java:62)
log4j:ERROR Could not parse input source [org.xml.sax.InputSource@2808b3].
java.lang.NullPointerException
at java.util.Hashtable.put(Unknown Source)
at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurat
or.java:141)
at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfi
gurator.java:153)
at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOM
Configurator.java:415)
at org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.ja
va:335)
at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:788)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:673)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:616)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:584)
at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:6
94)
at MyLoggerTest.main(MyLoggerTest.java:62)
Thanks & Regards
Sridharan Vembu
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