https://bz.apache.org/bugzilla/show_bug.cgi?id=70251
Bug ID: 70251
Summary: CloseableURLConnection closes shared Jar file
Product: Tomcat 11
Version: 11.0.25
Hardware: All
OS: All
Status: NEW
Severity: regression
Priority: P2
Component: Util
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -------
Environment: Tomcat version: 11.0.25+ (confirmed on 11.0.25 and 11.0.26)
Framework: Spring Boot (packaged as an executable WAR with nested JARs
containing JSPs)
Description:
When compiling JSPs located inside nested JAR files within a Spring Boot
executable WAR, compilation fails with the following exception:
java.lang.IllegalStateException: Zip file closed
Bisecting pointed to the following commit:
https://github.com/apache/tomcat/commit/eeef2107fb3157591c26674212fa16dfd1946b72
In CloseableURLConnection.close(), the try-with-resources statement actively
closes the underlying JarFile instance. In this deployment setup, the instance
is a Spring Boot NestedJarFile, which is shared across the application. Closing
it invalidates subsequent access, triggering the IllegalStateException on the
next resource read.
I initially suspected an issue or incompatibility on the Spring Boot side and
opened a report here:
https://github.com/spring-projects/spring-boot/issues/51733
According to the Spring Boot team, this appears to be a regression introduced
on Tomcat's side (see
https://github.com/spring-projects/spring-boot/issues/51733#issuecomment-5679108764).
I have created a minimal reproducer project demonstrating the issue:
https://github.com/HENgames/sbjsp-reproducer
Please refer to the README.md for steps to run. While this currently relies on
Spring Boot's launcher to supply the nested JAR structure, it consistently
reproduces the failure.
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