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Editorial Team
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Asked: 2026-05-27T22:06:54+00:00

In my test application I’m getting the below exception java.lang.NullPointerException at org.apache.log4j.CategoryKey.<init>(CategoryKey.java:20) at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:252)

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In my test application I’m getting the below exception

java.lang.NullPointerException
at org.apache.log4j.CategoryKey.<init>(CategoryKey.java:20)
at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:252)
at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:233)
at org.apache.log4j.LogManager.getLogger(LogManager.java:179)
at org.apache.log4j.Category.getInstance(Category.java:514)

Even though I am using the line 

static final Logger logger1 = Logger.getLogger(Test.class);

Can someone help me in resolving this….

Thanks

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1 Answer

  1. Editorial Team

    Odd, I did some searching around and that NPE is caused by a null Category name, but when you specify a Logger.getLogger(Test.class) you should not have that problem. I recommend getting the log4j source and debugging it.

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