Author: markt
Date: Tue Feb 23 23:56:51 2010
New Revision: 915598
URL: http://svn.apache.org/viewvc?rev=915598&view=rev
Log:
Improvements for WebappClassLoader#clearThreadLocalMap
(kkolinko/markt)
Modified:
tomcat/tc6.0.x/trunk/ (props changed)
tomcat/tc6.0.x/trunk/STATUS.txt
tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/LocalStrings.properties
tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/WebappClassLoader.java
tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc6.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Tue Feb 23 23:56:51 2010
@@ -1,2 +1,2 @@
/tomcat:883362
-/tomcat/trunk:601180,606992,612607,630314,640888,652744,653247,666232,673796,673820,677910,683969,683982,684001,684081,684234,684269-684270,685177,687503,687645,689402,690781,691392,691805,692748,693378,694992,695053,695311,696780,696782,698012,698227,698236,698613,699427,699634,701355,709294,709811,709816,710063,710066,710125,710205,711126,711600,712461,712467,713953,714002,718360,719119,719124,719602,719626,719628,720046,720069,721040,721286,721708,721886,723404,723738,726052,727303,728032,728768,728947,729057,729567,729569,729571,729681,729809,729815,729934,730250,730590,731651,732859,732863,734734,740675,740684,742677,742697,742714,744160,744238,746321,746384,746425,747834,747863,748344,750258,750291,750921,751286-751287,751289,751295,752323,753039,757335,757774,758249,758365,758596,758616,758664,759074,761601,762868,762929,762936-762937,763166,763183,763193,763228,763262,763298,763302,763325,763599,763611,763654,763681,763706,764985,764997,765662,768335,769979,770716,77
0809,770876,772872,776921,776924,776935,776945,777464,777466,777576,777625,778379,778523-778524,781528,781779,782145,782791,783316,783696,783724,783756,783762,783766,783863,783934,784453,784602,784614,785381,785688,785768,785859,786468,786487,786490,786496,786667,787627,787770,787985,789389,790405,791041,791184,791194,791224,791243,791326,791328,791789,792740,793372,793757,793882,793981,794082,794673,794822,795043,795152,795210,795457,795466,797168,797425,797596,797607,802727,802940,804462,804544,804734,805153,809131,809603,810916,810977,812125,812137,812432,813001,813013,813866,814180,814708,814876,815972,816252,817442,817822,819339,819361,820110,820132,820874,820954,821397,828196,828201,828210,828225,828759,830378-830379,830999,831106,831774,831785,831828,831850,831860,832214,832218,833121,833545,834047,835036,835336,836405,881396,881412,883130,883134,883146,883165,883177,883362,883565,884341,885038,885231,885241,885260,885901,885991,886019,888072,889363,889606,889716,8901
39,890265,890349-890350,890417,891185-891187,891583,892198,892341,892415,892464,892555,892812,892814,892817,892843,892887,893321,893493,894580,894586,894805,894831,895013,895045,895057,895191,895392,895703,896370,896384,897380-897381,897776,898126,898256,898468,898527,898555,898558,898718,898836,898906,899284,899348,899420,899653,899769-899770,899783,899788,899792,899916,899918-899919,899935,899949,903916,905020,905151,905722,905728,905735,907311,907513,907538,907652,907819,907825,907864,908721,908754,908759,909097,909525,909636,909875,910442,910471
+/tomcat/trunk:601180,606992,612607,630314,640888,652744,653247,666232,673796,673820,677910,683969,683982,684001,684081,684234,684269-684270,685177,687503,687645,689402,690781,691392,691805,692748,693378,694992,695053,695311,696780,696782,698012,698227,698236,698613,699427,699634,701355,709294,709811,709816,710063,710066,710125,710205,711126,711600,712461,712467,713953,714002,718360,719119,719124,719602,719626,719628,720046,720069,721040,721286,721708,721886,723404,723738,726052,727303,728032,728768,728947,729057,729567,729569,729571,729681,729809,729815,729934,730250,730590,731651,732859,732863,734734,740675,740684,742677,742697,742714,744160,744238,746321,746384,746425,747834,747863,748344,750258,750291,750921,751286-751287,751289,751295,752323,753039,757335,757774,758249,758365,758596,758616,758664,759074,761601,762868,762929,762936-762937,763166,763183,763193,763228,763262,763298,763302,763325,763599,763611,763654,763681,763706,764985,764997,765662,768335,769979,770716,77
0809,770876,772872,776921,776924,776935,776945,777464,777466,777576,777625,778379,778523-778524,781528,781779,782145,782791,783316,783696,783724,783756,783762,783766,783863,783934,784453,784602,784614,785381,785688,785768,785859,786468,786487,786490,786496,786667,787627,787770,787985,789389,790405,791041,791184,791194,791224,791243,791326,791328,791789,792740,793372,793757,793882,793981,794082,794673,794822,795043,795152,795210,795457,795466,797168,797425,797596,797607,802727,802940,804462,804544,804734,805153,809131,809603,810916,810977,812125,812137,812432,813001,813013,813866,814180,814708,814876,815972,816252,817442,817822,819339,819361,820110,820132,820874,820954,821397,828196,828201,828210,828225,828759,830378-830379,830999,831106,831774,831785,831828,831850,831860,832214,832218,833121,833545,834047,835036,835336,836405,881396,881412,883130,883134,883146,883165,883177,883362,883565,884341,885038,885231,885241,885260,885901,885991,886019,888072,889363,889606,889716,8901
39,890265,890349-890350,890417,891185-891187,891583,892198,892341,892415,892464,892555,892812,892814,892817,892843,892887,893321,893493,894580,894586,894805,894831,895013,895045,895057,895191,895392,895703,896370,896384,897380-897381,897776,898126,898256,898468,898527,898555,898558,898718,898836,898906,899284,899348,899420,899653,899769-899770,899783,899788,899792,899916,899918-899919,899935,899949,903916,905020,905151,905722,905728,905735,907311,907513,907538,907652,907819,907825,907864,908002,908721,908754,908759,909097,909206,909212,909525,909636,909875,910442,910471
Modified: tomcat/tc6.0.x/trunk/STATUS.txt
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/STATUS.txt?rev=915598&r1=915597&r2=915598&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/STATUS.txt (original)
+++ tomcat/tc6.0.x/trunk/STATUS.txt Tue Feb 23 23:56:51 2010
@@ -119,13 +119,6 @@
http://tools.ietf.org/html/rfc2616
-* Improvements for WebappClassLoader#clearThreadLocalMap:
- http://svn.apache.org/viewvc?rev=908002&view=rev
- http://svn.apache.org/viewvc?rev=909206&view=rev
- http://svn.apache.org/viewvc?rev=909212&view=rev
- +1: kkolinko, markt, fhanik
- -1:
-
* Memory leak detection for JMX and manager
http://people.apache.org/~markt/patches/2010-02-12-memory-leak-detection.patch
+1: markt
Modified:
tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/LocalStrings.properties
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/LocalStrings.properties?rev=915598&r1=915597&r2=915598&view=diff
==============================================================================
---
tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/LocalStrings.properties
(original)
+++
tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/LocalStrings.properties
Tue Feb 23 23:56:51 2010
@@ -38,6 +38,7 @@
webappClassLoader.clearReferencesResourceBundlesFail=Failed to clear
ResourceBundle references
webappClassLoader.clearRmiInfo=Failed to find class sun.rmi.transport.Target
to clear context class loader. This is expected on non-Sun JVMs.
webappClassLoader.clearRmiFail=Failed to clear context class loader referenced
from sun.rmi.transport.Target
+webappClassLoader.clearThreadLocalDebug=A web application created a
ThreadLocal with key of type [{0}] (value [{1}]). The ThreadLocal has been
correctly set to null and the key will be removed by GC. However, to simplify
the process of tracing memory leaks, the key has been forcibly removed.
webappClassLoader.clearThreadLocal=A web application created a ThreadLocal
with key of type [{0}] (value [{1}]) and a value of type [{2}] (value [{3}])
but failed to remove it when the web application was stopped. To prevent a
memory leak, the ThreadLocal has been forcibly removed.
webappClassLoader.clearThreadLocalFail=Failed to clear ThreadLocal references
webappClassLoader.stopThreadFail=Failed to terminate thread named [{0}]
Modified:
tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/WebappClassLoader.java
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/WebappClassLoader.java?rev=915598&r1=915597&r2=915598&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/WebappClassLoader.java
(original)
+++ tomcat/tc6.0.x/trunk/java/org/apache/catalina/loader/WebappClassLoader.java
Tue Feb 23 23:56:51 2010
@@ -2158,15 +2158,13 @@
ThreadLocal.class);
mapRemove.setAccessible(true);
Object[] table = (Object[]) internalTableField.get(map);
+ int staleEntriesCount = 0;
if (table != null) {
for (int j =0; j < table.length; j++) {
if (table[j] != null) {
boolean remove = false;
// Check the key
- Field keyField =
- Reference.class.getDeclaredField("referent");
- keyField.setAccessible(true);
- Object key = keyField.get(table[j]);
+ Object key = ((Reference<?>) table[j]).get();
if (this.equals(key) || (key != null &&
this == key.getClass().getClassLoader())) {
remove = true;
@@ -2181,7 +2179,6 @@
remove = true;
}
if (remove) {
- Object entry = ((Reference<?>) table[j]).get();
Object[] args = new Object[4];
if (key != null) {
args[0] = key.getClass().getCanonicalName();
@@ -2191,14 +2188,32 @@
args[2] = value.getClass().getCanonicalName();
args[3] = value.toString();
}
- log.error(sm.getString(
- "webappClassLoader.clearThreadLocal",
- args));
- mapRemove.invoke(map, entry);
+ if (value == null) {
+ if (log.isDebugEnabled()) {
+ log.debug(sm.getString(
+
"webappClassLoader.clearThreadLocalDebug",
+ args));
+ }
+ } else {
+ log.error(sm.getString(
+ "webappClassLoader.clearThreadLocal",
+ args));
+ }
+ if (key == null) {
+ staleEntriesCount++;
+ } else {
+ mapRemove.invoke(map, key);
+ }
}
}
}
}
+ if (staleEntriesCount > 0) {
+ Method mapRemoveStale =
+ map.getClass().getDeclaredMethod("expungeStaleEntries");
+ mapRemoveStale.setAccessible(true);
+ mapRemoveStale.invoke(map);
+ }
}
}
Modified: tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml?rev=915598&r1=915597&r2=915598&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml Tue Feb 23 23:56:51 2010
@@ -104,6 +104,10 @@
stop and by clearing references retained due to the use of
<code>java.util.ResourceBundle</code>. (markt)
</add>
+ <update>
+ Modify ThreadLocal memory leak detection to not report false positives
+ and to simplify implementation. (markt/kkolinko)
+ </update>
</changelog>
</subsection>
<subsection name="Jasper">
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