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markt pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/tomcat.git
The following commit(s) were added to refs/heads/master by this push:
new 7fb643d Fix https://bz.apache.org/bugzilla/show_bug.cgi?id=63836
7fb643d is described below
commit 7fb643d2c0d0c9630fa820d5bdcae5433e30dd9b
Author: Mark Thomas <ma...@apache.org>
AuthorDate: Mon Oct 28 21:03:33 2019 +0100
Fix https://bz.apache.org/bugzilla/show_bug.cgi?id=63836
While the OOME was not observed in 8.5.x, the memory leak at the root of
the issue was still present.
---
.../org/apache/catalina/startup/ContextConfig.java | 24 ++++++++++++++++++----
webapps/docs/changelog.xml | 4 ++++
2 files changed, 24 insertions(+), 4 deletions(-)
diff --git a/java/org/apache/catalina/startup/ContextConfig.java
b/java/org/apache/catalina/startup/ContextConfig.java
index 75a16db..fa11334 100644
--- a/java/org/apache/catalina/startup/ContextConfig.java
+++ b/java/org/apache/catalina/startup/ContextConfig.java
@@ -37,8 +37,6 @@ import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
import javax.servlet.MultipartConfigElement;
import javax.servlet.ServletContainerInitializer;
import javax.servlet.ServletContext;
@@ -80,6 +78,7 @@ import org.apache.tomcat.util.bcel.classfile.ElementValue;
import org.apache.tomcat.util.bcel.classfile.ElementValuePair;
import org.apache.tomcat.util.bcel.classfile.JavaClass;
import org.apache.tomcat.util.buf.UriUtil;
+import org.apache.tomcat.util.collections.ManagedConcurrentWeakHashMap;
import org.apache.tomcat.util.descriptor.InputSourceUtil;
import org.apache.tomcat.util.descriptor.XmlErrorHandler;
import org.apache.tomcat.util.descriptor.web.ContextEjb;
@@ -163,8 +162,8 @@ public class ContextConfig implements LifecycleListener {
/**
* Cache of default web.xml fragments per Host
*/
- protected static final Map<Host,DefaultWebXmlCacheEntry> hostWebXmlCache =
- new ConcurrentHashMap<>();
+ protected static final
ManagedConcurrentWeakHashMap<Host,DefaultWebXmlCacheEntry> hostWebXmlCache =
+ new ManagedConcurrentWeakHashMap<>();
/**
@@ -306,6 +305,8 @@ public class ContextConfig implements LifecycleListener {
if (originalDocBase != null) {
context.setDocBase(originalDocBase);
}
+ } else if (event.getType().equals(Lifecycle.PERIODIC_EVENT)) {
+ hostWebXmlCache.maintain();
} else if (event.getType().equals(Lifecycle.CONFIGURE_STOP_EVENT)) {
configureStop();
} else if (event.getType().equals(Lifecycle.AFTER_INIT_EVENT)) {
@@ -1599,6 +1600,9 @@ public class ContextConfig implements LifecycleListener {
entry = new DefaultWebXmlCacheEntry(webXmlDefaultFragment,
globalTimeStamp, hostTimeStamp);
hostWebXmlCache.put(host, entry);
+ // Add a Lifecycle listener to the Host that will remove it
from
+ // the hostWebXmlCache once the Host is destroyed
+ host.addLifecycleListener(new HostWebXmlCacheCleaner());
}
return webXmlDefaultFragment;
@@ -2681,6 +2685,18 @@ public class ContextConfig implements LifecycleListener {
}
}
+ private static class HostWebXmlCacheCleaner implements LifecycleListener {
+
+ @Override
+ public void lifecycleEvent(LifecycleEvent event) {
+
+ if (event.getType() == Lifecycle.AFTER_DESTROY_EVENT) {
+ Host host = (Host) event.getSource();
+ hostWebXmlCache.remove(host);
+ }
+ }
+ }
+
static class JavaClassCacheEntry {
public final String superclassName;
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index 87e5d44..25c065c 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -59,6 +59,10 @@
Add more details on the usage of <code>RewriteMap</code>
functionality in the <code>RewriteValve</code>. (fschumacher)
</add>
+ <fix>
+ <bug>63836</bug> Ensure that references to the Host object are cleared
+ once the Host instance is destroyed. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Coyote">
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