On Jul 14, 2007, at 4:00 PM, Kenton wrote:
I'm getting this exception in my Struts application. It looks like
a log4j
exception (or is it a Tomcat/catalina exception?). Any ideas on how
I can
get this resolved?
java.lang.NullPointerException
at java.lang.String.startsWith(String.java:1422)
at java.lang.String.startsWith(String.java:1451)
at
org.apache.naming.resources.FileDirContext.file(FileDirContext.java:
916)
at
...
org.apache.catalina.loader.WebappClassLoader.getResource
(WebappClassLoader.java:1181)
at org.apache.log4j.helpers.Loader.getResource(Loader.java:
109)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:105)
at org.apache.log4j.Logger.getLogger(Logger.java:104)
at
The exception occurs when log4j is trying to find either
"log4j.properties" or "log4j.xml" to perform default initialization
(can't be sure which one since your line numbers don't align with the
current source). The resource names are stored in static final
members. There are two possibilities that I see:
a) either Tomcat's app reloading mechanism result in the static final
members being null and not the expected value. The null passed down
through the Tomcat class loaders results in the NPE.
b) The expected value gets passed down to Tomcat and there is an
implementation bug in Tomcat's class loader.
Looks like something Tomcat specific and you would have better like
reposting on tomcat-user and specifying what version on Tomcat you
are using and the conditions under which the exception is encountered.
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