svn commit: r909525 - /tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoader.java

[ma...@apache.org]

Author: markt
Date: Fri Feb 12 17:49:49 2010
New Revision: 909525

URL: http://svn.apache.org/viewvc?rev=909525&view=rev
Log:
Looks like the ResourceBundle leaks are triggered by a GC bug - only seems to affect Sun JVMs.
The fix is also Sun specific so only log a debug message if the internal field can't be found on a non-Sun JVM (it isn't there for IBM for example)

Modified:
    tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoader.java

Modified: tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoader.java
URL: http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoader.java?rev=909525&r1=909524&r2=909525&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoader.java (original)
+++ tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoader.java Fri Feb 12 17:49:49 2010
@@ -1782,6 +1782,10 @@
         }
         
         // Clear the resource bundle cache
+        // This shouldn't be necessary, the cache uses weak references but
+        // it has caused leaks. Oddly, using the leak detection code in
+        // standard host allows the class loader to be GC'd. This has been seen
+        // on Sun but not IBM JREs. Maybe a bug in Sun's GC impl?
         clearReferencesResourceBundles();
 
         // Clear the classloader reference in the VM's bean introspector
@@ -2395,8 +2399,13 @@
             log.error(sm.getString(
                     "webappClassLoader.clearReferencesResourceBundlesFail"), e);
         } catch (NoSuchFieldException e) {
-            log.error(sm.getString(
-                    "webappClassLoader.clearReferencesResourceBundlesFail"), e);
+            if (System.getProperty("java.vendor").startsWith("Sun")) {
+                log.error(sm.getString(
+                "webappClassLoader.clearReferencesResourceBundlesFail"), e);
+            } else {
+                log.debug(sm.getString(
+                "webappClassLoader.clearReferencesResourceBundlesFail"), e);
+            }
         } catch (IllegalArgumentException e) {
             log.error(sm.getString(
                     "webappClassLoader.clearReferencesResourceBundlesFail"), e);



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