Fix regression in `JarUrlConnection` where a NullPointerException could
be thrown internally causing performance issues.
When the SecurityManager is present, the following stack trace is
thrown:
java.lang.NullPointerException: Cannot invoke "java.net.URLConnection.getPermission()" because "this.jarFileConnection" is null
at org.springframework.boot.loader.net.protocol.jar.JarUrlConnection.getPermission(JarUrlConnection.java:175)
at java.base/jdk.internal.loader.URLClassPath.check(URLClassPath.java:553)
at java.base/jdk.internal.loader.URLClassPath$Loader.findResource(URLClassPath.java:612)
at java.base/jdk.internal.loader.URLClassPath.findResource(URLClassPath.java:296)
at java.base/java.net.URLClassLoader$2.run(URLClassLoader.java:629)
at java.base/java.net.URLClassLoader$2.run(URLClassLoader.java:627)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.net.URLClassLoader.findResource(URLClassLoader.java:626)
at org.springframework.boot.loader.net.protocol.jar.JarUrlClassLoader.findResource(JarUrlClassLoader.java:70)
at java.base/java.lang.ClassLoader.getResource(ClassLoader.java:1403)
at java.base/java.net.URLClassLoader.getResourceAsStream(URLClassLoader.java:290)
at java.base/java.lang.Class.getResourceAsStream(Class.java:2850)
See gh-39856
The diagnostics text include the name of the AOT initializer class and
the main class name. It also tells the user how to switch of the AOT
mode.
Closes gh-38645
Update buildpack support to allow gzip compressed image layers to be
used when returned by the Docker engine. This update is restores
buildpack support when using Docker Desktop with the "Use containerd
for pulling and storing images" option enabled.
This commit introduces a new `ExportedImageTar` class to deal with the
intricacies of determining the mimetype of a layer. The class deals with
the parsing of `index.json' and related manifest blobs in order to
obtain layer information. The legacy `manifest.json` format is also
supported should `index.json` be missing.
Tests have been added to ensure that export archives from Docker Engine,
Docker Desktop (with and without containerd), and Podman can be used.
Fixes gh-40100
Co-authored-by: Moritz Halbritter <moritz.halbritter@broadcom.com>
Co-authored-by: Scott Frederick <scott.frederick@broadcom.com>
