Re: log4j-caused NullPointerException

[Curt Arnold]

On Aug 8, 2006, at 8:09 AM, Daniel Serodio wrote:
When I try to reload an application in Tomcat, I get the following  
error:

log4j:ERROR Error occured while converting date.
java.lang.NullPointerException: null array passed into arraycopy
    at
java.lang.System.arraycopy(Ljava.lang.Object;ILjava.lang.Object;II)V 
(Unknown
Source)
    at
java.lang.AbstractStringBuilder.getChars(AbstractStringBuilder.java: 
331)
    at java.lang.StringBuffer.getChars(StringBuffer.java:202)
    at


Might try asking on the tomcat-user list.  I've seen some surprising  
behavior during class reloading and it isn't an area that I have any  
experience with.  If you do get an analysis, I would appreciate your  
giving us a heads up by posting the resolution back here.

I did look at the code in question.  If lastTimeString was somehow  
not initialized on class reload, then there could be a NPE on the  
call to getChars().  However, short of a some failure in the VM or a  
class reloading hack, I don't see how lastTimeString could be null.

When you post to the tomcat list, please identify the version of  
log4j, tomcat and the Java VM and platform.

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