honeymoose
/
OpenSearch
mirror of https://github.com/honeymoose/OpenSearch.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Don't jarhell check system jars

This commit is contained in:
Robert Muir 2015-07-01 13:26:00 -04:00
parent b55a3f32b8
commit 30f267f758
1 changed files with 21 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
View File

@ -46,6 +46,11 @@ import java.util.jar.Manifest;
/** Simple check for duplicate class files across the classpath */
public class JarHell {
/** Simple driver class, can be used eg. from builds. Returns non-zero on jar-hell */
public static void main(String args[]) throws Exception {
checkJarHell();
}
/**
* Checks the current classloader for duplicate classes
* @throws IllegalStateException if jar hell was found
@ -57,9 +62,9 @@ public class JarHell {
}
ESLogger logger = Loggers.getLogger(JarHell.class);
if (logger.isDebugEnabled()) {
logger.debug("java.class.path= {}" + System.getProperty("java.class.path"));
logger.debug("sun.boot.class.path= {}" + System.getProperty("sun.boot.class.path"));
logger.debug("classloader urls= {}" + Arrays.toString(((URLClassLoader)loader).getURLs()));
logger.debug("java.class.path: {}", System.getProperty("java.class.path"));
logger.debug("sun.boot.class.path: {}", System.getProperty("sun.boot.class.path"));
logger.debug("classloader urls: {}", Arrays.toString(((URLClassLoader)loader).getURLs()));
}
checkJarHell(((URLClassLoader)loader).getURLs());
}
@ -70,14 +75,26 @@ public class JarHell {
*/
@SuppressForbidden(reason = "needs JarFile for speed, just reading entries")
public static void checkJarHell(URL urls[]) throws Exception {
ESLogger logger = Loggers.getLogger(JarHell.class);
// we don't try to be sneaky and use deprecated/internal/not portable stuff
// like sun.boot.class.path, and with jigsaw we don't yet have a way to get
// a "list" at all. So just exclude any elements underneath the java home
String javaHome = System.getProperty("java.home");
final Map<String,URL> clazzes = new HashMap<>(32768);
Set<String> seenJars = new HashSet<>();
for (final URL url : urls) {
String path = URLDecoder.decode(url.getPath(), "UTF-8");
// exclude system resources
if (path.startsWith(javaHome)) {
logger.debug("excluding system resource: {}", path);
continue;
}
if (path.endsWith(".jar")) {
if (!seenJars.add(path)) {
logger.debug("excluding duplicate classpath element: {}", path);
continue; // we can't fail because of sheistiness with joda-time
}
logger.debug("examining jar: {}", path);
try (JarFile file = new JarFile(path)) {
Manifest manifest = file.getManifest();
if (manifest != null) {
@ -111,6 +128,7 @@ public class JarHell {
}
}
} else {
logger.debug("examining directory: {}", path);
// case for tests: where we have class files in the classpath
final Path root = PathUtils.get(url.toURI());
final String sep = root.getFileSystem().getSeparator();