https://issues.apache.org/bugzilla/show_bug.cgi?id=44899
Summary: DOMConfigurator.findAppenderByName causes Nullpointer
Product: Log4j
Version: 1.2
Platform: All
OS/Version: All
Status: NEW
Severity: major
Priority: P2
Component: Appender
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
if the log4j.xml configuration file contains a custom appender for which the
class cannot be located, then a ClassNotFoundException is thrown which is
followed by a NullPointerException.
The appender at line 171 in
file: DOMConfigurator.java
function : findAppenderByName(Document doc, String appenderName)
Here are the two stack traces:
log4j:ERROR Could not create an Appender. Reported error follows.
java.lang.ClassNotFoundException:
com.dvclabs.logging.client.log4jappender.LoggingInfrastructureAppender
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.log4j.helpers.Loader.loadClass(Loader.java:179)
at
org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:237)
at
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:171)
at
org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:184)
at
org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:502)
at
org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:471)
at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:921)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:790)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:682)
at
org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:811)
log4j:ERROR Could not parse file [metadata/log4j.xml].
java.lang.NullPointerException
at java.util.Hashtable.put(Unknown Source)
at
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:172)
at
org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:184)
at
org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:502)
at
org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:471)
at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:921)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:790)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:682)
at
org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:811)
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