I am deploying a WAR with a sealed oracle driver (ojdbc7-12.1.0.2.jar). This works fine in apache-tomcat-8.0.23 but refused to work with apache-tomcat-8.0.24 with this error: Caused by: java.lang.SecurityException: Sealing violation loading oracle.jdbc.driver.OracleDriverExtension : Package oracle.jdbc.driver is sealed. at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2468) ~[catalina.jar:8.0.24] at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:857) ~[catalina.jar:8.0.24] I initially create this issue at spring-boot because I expected the spring-boot boostrap to be the source of the problem but as it works fine with 8.0.23 it clearly seems to be a bug introduced with 8.0.24. Here is the original issue with additional details: https://github.com/spring-projects/spring-boot/issues/3656
I can't reproduce this with a simple JSP that loads the driver and the class listed in the error above. Please provide the simplest possible test case (ideally a single JSP) that generates this error when used with a web application that includes only ojdbc7-12.1.0.2.jar in WEB-INF/lib.
Maybe we can create a sample out of here: https://github.com/spring-projects/spring-boot/blob/master/spring-boot-samples/spring-boot-sample-data-jpa/pom.xml by switching to oracle driver and chaning to WAR packaging. However this is quite some effort. I also do not see much changes to reproduce this with a JSP. Are there changes in org.apache.catalina.loader.WebappClassLoaderBase or related between 8.0.23 and 8.0.24 related to this?
Scratch that. I can see where the problem is. Different symptom but the same root cause as a previously reported issue. *** This bug has been marked as a duplicate of bug 58192 ***