Author: markt
Date: Mon Jan 9 21:55:54 2017
New Revision: 1778065
URL: http://svn.apache.org/viewvc?rev=1778065&view=rev
Log:
Add memory protection for ForkJoinPool.commonPool() related memory leaks.
Added:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/startup/SafeForkJoinWorkerThreadFactory.java
- copied unchanged from r1778061,
tomcat/trunk/java/org/apache/catalina/startup/SafeForkJoinWorkerThreadFactory.java
Modified:
tomcat/tc8.5.x/trunk/ (props changed)
tomcat/tc8.5.x/trunk/build.xml
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/JreMemoryLeakPreventionListener.java
tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml
tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml
Propchange: tomcat/tc8.5.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Mon Jan 9 21:55:54 2017
@@ -1 +1 @@
-/tomcat/trunk:1734785,1734799,1734845,1734928,1735041,1735044,1735480,1735577,1735597,1735599-1735600,1735615,1736145,1736162,1736209,1736280,1736297,1736299,1736489,1736646,1736703,1736836,1736849,1737104-1737105,1737112,1737117,1737119-1737120,1737155,1737157,1737192,1737280,1737339,1737632,1737664,1737715,1737748,1737785,1737834,1737860,1737903,1737959,1738005,1738007,1738014-1738015,1738018,1738022,1738039,1738043,1738059-1738060,1738147,1738149,1738174-1738175,1738261,1738589,1738623-1738625,1738643,1738816,1738850,1738855,1738946-1738948,1738953-1738954,1738979,1738982,1739079-1739081,1739087,1739113,1739153,1739172,1739176,1739191,1739474,1739726,1739762,1739775,1739814,1739817-1739818,1739975,1740131,1740324,1740465,1740495,1740508-1740509,1740520,1740535,1740707,1740803,1740810,1740969,1740980,1740991,1740997,1741015,1741033,1741036,1741058,1741060,1741080,1741147,1741159,1741164,1741173,1741181,1741190,1741197,1741202,1741208,1741213,1741221,1741225,1741232,1741409,1741501
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+/tomcat/trunk:1734785,1734799,1734845,1734928,1735041,1735044,1735480,1735577,1735597,1735599-1735600,1735615,1736145,1736162,1736209,1736280,1736297,1736299,1736489,1736646,1736703,1736836,1736849,1737104-1737105,1737112,1737117,1737119-1737120,1737155,1737157,1737192,1737280,1737339,1737632,1737664,1737715,1737748,1737785,1737834,1737860,1737903,1737959,1738005,1738007,1738014-1738015,1738018,1738022,1738039,1738043,1738059-1738060,1738147,1738149,1738174-1738175,1738261,1738589,1738623-1738625,1738643,1738816,1738850,1738855,1738946-1738948,1738953-1738954,1738979,1738982,1739079-1739081,1739087,1739113,1739153,1739172,1739176,1739191,1739474,1739726,1739762,1739775,1739814,1739817-1739818,1739975,1740131,1740324,1740465,1740495,1740508-1740509,1740520,1740535,1740707,1740803,1740810,1740969,1740980,1740991,1740997,1741015,1741033,1741036,1741058,1741060,1741080,1741147,1741159,1741164,1741173,1741181,1741190,1741197,1741202,1741208,1741213,1741221,1741225,1741232,1741409,1741501
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Modified: tomcat/tc8.5.x/trunk/build.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/build.xml?rev=1778065&r1=1778064&r2=1778065&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/build.xml (original)
+++ tomcat/tc8.5.x/trunk/build.xml Mon Jan 9 21:55:54 2017
@@ -336,6 +336,8 @@
<include name="org/apache/catalina/startup/CatalinaProperties.*" />
<include name="org/apache/catalina/startup/ClassLoaderFactory.*" />
<include name="org/apache/catalina/startup/ClassLoaderFactory$*.*" />
+ <include
name="org/apache/catalina/startup/SafeForkJoinWorkerThreadFactory.*" />
+ <include
name="org/apache/catalina/startup/SafeForkJoinWorkerThreadFactory$*.*" />
<include name="org/apache/catalina/startup/Tool.*" />
<include name="org/apache/catalina/security/SecurityClassLoad.*" />
<include name="org/apache/catalina/webresources/war/**" />
Modified:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/JreMemoryLeakPreventionListener.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/JreMemoryLeakPreventionListener.java?rev=1778065&r1=1778064&r2=1778065&view=diff
==============================================================================
---
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/JreMemoryLeakPreventionListener.java
(original)
+++
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/JreMemoryLeakPreventionListener.java
Mon Jan 9 21:55:54 2017
@@ -25,6 +25,7 @@ import java.net.URL;
import java.net.URLConnection;
import java.sql.DriverManager;
import java.util.StringTokenizer;
+import java.util.concurrent.ForkJoinPool;
import javax.imageio.ImageIO;
import javax.xml.parsers.DocumentBuilder;
@@ -34,6 +35,7 @@ import javax.xml.parsers.ParserConfigura
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleListener;
+import org.apache.catalina.startup.SafeForkJoinWorkerThreadFactory;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.ExceptionUtils;
@@ -64,6 +66,8 @@ public class JreMemoryLeakPreventionList
private static final StringManager sm =
StringManager.getManager(Constants.Package);
+ private static final String FORK_JOIN_POOL_THREAD_FACTORY_PROPERTY =
+ "java.util.concurrent.ForkJoinPool.common.threadFactory";
/**
* Protect against the memory leak caused when the first call to
* <code>sun.awt.AppContext.getAppContext()</code> is triggered by a web
@@ -201,6 +205,19 @@ public class JreMemoryLeakPreventionList
}
/**
+ * {@link ForkJoinPool#commonPool()} creates a thread pool that, by
default,
+ * creates threads that retain references to the thread context class
+ * loader.
+ */
+ private boolean forkJoinCommonPoolProtection = true;
+ public boolean getForkJoinCommonPoolProtection() {
+ return forkJoinCommonPoolProtection;
+ }
+ public void setForkJoinCommonPoolProtection(boolean
forkJoinCommonPoolProtection) {
+ this.forkJoinCommonPoolProtection = forkJoinCommonPoolProtection;
+ }
+
+ /**
* List of comma-separated fully qualified class names to load and
initialize during
* the startup of this Listener. This allows to pre-load classes that are
known to
* provoke classloader leaks if they are loaded during a request
processing.
@@ -439,6 +456,17 @@ public class JreMemoryLeakPreventionList
}
}
+ /*
+ * Present in Java 8 onwards
+ */
+ if (forkJoinCommonPoolProtection &&
JreCompat.isJre8Available()) {
+ // Don't override any explicitly set property
+ if
(System.getProperty(FORK_JOIN_POOL_THREAD_FACTORY_PROPERTY) == null) {
+
System.setProperty(FORK_JOIN_POOL_THREAD_FACTORY_PROPERTY,
+
SafeForkJoinWorkerThreadFactory.class.getName());
+ }
+ }
+
if (classesToInitialize != null) {
StringTokenizer strTok =
new StringTokenizer(classesToInitialize, ", \r\n\t");
Modified: tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml?rev=1778065&r1=1778064&r2=1778065&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml Mon Jan 9 21:55:54 2017
@@ -45,6 +45,15 @@
issues do not "pop up" wrt. others).
-->
<section name="Tomcat 8.5.11 (markt)" rtext="in development">
+ <subsection name="Catalina">
+ <changelog>
+ <add>
+ Extend the <code>JreMemoryLeakPreventionListener</code> to provide
+ protection against <code>ForkJoinPool.commonPool()</code> related
memory
+ leaks. (markt)
+ </add>
+ </changelog>
+ </subsection>
<subsection name="Coyote">
<changelog>
<fix>
Modified: tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml?rev=1778065&r1=1778064&r2=1778065&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml (original)
+++ tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml Mon Jan 9 21:55:54
2017
@@ -216,6 +216,18 @@
default is <code>true</code>.</p>
</attribute>
+ <attribute name="forkJoinCommonPoolProtection" required="false">
+ <p>Enables protection so the threads created for
+ <code>ForkJoinPool.commonPool()</code> do not result in a memory leak.
+ The protection is enabled by setting the
+ <code>java.util.concurrent.ForkJoinPool.common.threadFactory</code>
+ system property. If this property is set when Tomcat starts, Tomcat
will
+ not over-ride it even if this protection is explictly enabled. The
+ default is <code>true</code>. This protection is only used when running
+ on Java 8 onwards. The common pool does not exist in earlier
+ versions.</p>
+ </attribute>
+
<attribute name="gcDaemonProtection" required="false">
<p>Enables protection so that calls to
<code>sun.misc.GC.requestLatency(long)</code> triggered by a web
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