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Posted to dev@tomcat.apache.org by bu...@apache.org on 2010/02/08 19:28:34 UTC
DO NOT REPLY [Bug 48694] WebappClassLoader deadlock if web
application uses it's own classloader
https://issues.apache.org/bugzilla/show_bug.cgi?id=48694
--- Comment #1 from Mark Thomas <ma...@apache.org> 2010-02-08 10:28:29 UTC ---
I'd like to avoid making WebappClassLoader#loadClass synchronized if at all
possible. Could you try this patch instead?
Index: java/org/apache/catalina/loader/WebappClassLoader.java
===================================================================
--- java/org/apache/catalina/loader/WebappClassLoader.java (revision 907621)
+++ java/org/apache/catalina/loader/WebappClassLoader.java (working copy)
@@ -989,9 +989,7 @@
}
if ((clazz == null) && hasExternalRepositories) {
try {
- synchronized (this) {
- clazz = super.findClass(name);
- }
+ clazz = super.findClass(name);
} catch(AccessControlException ace) {
log.warn("WebappClassLoader.findClassInternal(" + name
+ ") security exception: " + ace.getMessage(),
ace);
@@ -2273,7 +2271,7 @@
if (clazz != null)
return clazz;
- synchronized (this) {
+ synchronized (name.intern()) {
clazz = entry.loadedClass;
if (clazz != null)
return clazz;
Thanks,
Mark
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