IncompatibleClassChangeError exception solution
The pom.xml of the maven project introduces jars of other services. The development environment runs normally, but when it is deployed to the server, it starts to report errors:
java.lang.IncompatibleClassChangeError: class org.springframework.core.type.classreading.ClassMetadataReadingVisitor has interface .....
Reason analysis: "IncompatibleClassChangeError" indicates a jar conflict, according to the following "org.springframework.core.type.classreading.ClassMetadataReadingVisitor" to find the jar. Find the URL: https://www.findjar.com/index.x Then enter the class path "classreading.ClassMetadataReadingVisitor", you can see the jar where "classreading.ClassMetadataReadingVisitor" is located, as shown below:
Then click any link in the search results in the above figure, you can see the dependent jar, as shown below:
in the image abovespring.jar and spring-core.jar are the dependent jars.
So it is the jar conflict brought by the spring version upgrade.
In analyzing the spring dependency package of the project, it is found that the original version is spring version 3.1, and the integrated service has changed the spring-core and spring-bean versions to version: 4.2, other Spring depends on the package but still 3.1. After testing, all the dependencies of spring have changed to 4.2 or 3.1, and new or previous services of the project will report errors, so it is necessary to analyze which packages need to be upgraded to 4.2 and which do not need to be upgraded?
The method is: according to the log file, find which jar the error class depends on, and then adjust the current jar version.
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