Causes of java.lang.VerifyError
Problem:
When deploying a servlet on a JBoss server compiled with JDK 1.5.0_11, a java.lang.VerifyError occurs. The error persists even after recompiling with JDK 1.5.0_15.
Possible Cause:
java.lang.VerifyError can arise when there's a discrepancy between the library versions used during compilation and runtime.
Explanation:
At compile-time, the code is checked against the methods and class signatures present in the library used. However, during runtime, if a different library is utilized, the actual method signatures and class definitions might differ from those used at compilation. This can lead to VerifyError.
Solution:
Ensure that the library version used during compilation matches the one present on the classpath at runtime. Verify the classpath and ensure that the correct library is being referenced.
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