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From ma...@apache.org
Subject svn commit: r1022117 - in /tomcat/tc6.0.x/trunk: ./ STATUS.txt java/org/apache/catalina/core/ApplicationContext.java java/org/apache/catalina/core/StandardContext.java webapps/docs/changelog.xml
Date Wed, 13 Oct 2010 14:41:58 GMT
Author: markt
Date: Wed Oct 13 14:41:57 2010
New Revision: 1022117

URL: http://svn.apache.org/viewvc?rev=1022117&view=rev
Log:
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=49987
Thread safety issue with population of servlet context initialisation parameters.
Back-port wasn't completely clean - please review.

Modified:
    tomcat/tc6.0.x/trunk/   (props changed)
    tomcat/tc6.0.x/trunk/STATUS.txt
    tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/ApplicationContext.java
    tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/StandardContext.java
    tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml

Propchange: tomcat/tc6.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Wed Oct 13 14:41:57 2010
@@ -1 +1 @@
-/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
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 ,948057,950164,950596,950614,950851,950905,951615,953434,954435,955648,955655,956832,957130,957830,958192,960701,963868,964614,966177-966178,966292,966692,981815,991837,993042,1001955,1002185,1002263,1002349,1002359,1002362,1002481,1002514,1003481,1003488,1003556,1003572,1003581,1003861
+/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
 39,890265,890349-890350,890417,891185-891187,891583,892198,892341,892415,892464,892555,892812,892814,892817,892843,892887,893321,893493,894580,894586,894805,894831,895013,895045,895057,895191,895392,895703,896370,896384,897380-897381,897776,898126,898256,898468,898527,898555,898558,898718,898836,898906,899284,899348,899420,899653,899769-899770,899783,899788,899792,899916,899918-899919,899935,899949,903916,905020,905151,905722,905728,905735,907311,907513,907538,907652,907819,907825,907864,908002,908721,908754,908759,909097,909206,909212,909525,909636,909869,909875,909887,910266,910370,910442,910471,910485,910974,915226,915737,915861,916097,916141,916157,916170,917598,917633,918093,918489,918594,918684,918787,918792,918799,918803,918885,919851,919914,920025,920055,920298,920449,920596,920824,920840,921444,922010,926716,927062,927621,928482,928695,928732,928798,931709,932357,932967,935105,935983,939491,939551,940064,941356,941463,944409,944416,945231,945808,945835,945841,946686
 ,948057,950164,950596,950614,950851,950905,951615,953434,954435,955648,955655,956832,957130,957830,958192,960701,963868,964614,966177-966178,966292,966692,981815,991837,993042,1001955,1002185,1002263,1002349,1002359,1002362,1002481,1002514,1003481,1003488,1003556,1003572,1003581,1003861,1005647

Modified: tomcat/tc6.0.x/trunk/STATUS.txt
URL: http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/STATUS.txt?rev=1022117&r1=1022116&r2=1022117&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/STATUS.txt (original)
+++ tomcat/tc6.0.x/trunk/STATUS.txt Wed Oct 13 14:41:57 2010
@@ -251,13 +251,6 @@ PATCHES PROPOSED TO BACKPORT:
   +1: markt, kfujino, kkolinko, timw
   -1:
 
-* Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=49987
-  Thread safety issue with population of servlet context initialization
-  parameters.
-  http://svn.apache.org/viewvc?rev=1005647&view=rev
-  +1: markt, kfujino, kkolinko, timw
-  -1:
-
   Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=50066
   Compile recursive tag file if it depends on a JAR. Patch provided by Sylvain
   Laurent.

Modified: tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/ApplicationContext.java
URL: http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/ApplicationContext.java?rev=1022117&r1=1022116&r2=1022117&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/ApplicationContext.java (original)
+++ tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/ApplicationContext.java Wed Oct 13
14:41:57 2010
@@ -122,7 +122,8 @@ public class ApplicationContext
     /**
      * The merged context initialization parameters for this Context.
      */
-    private Map parameters = null;
+    private Map<String,String> parameters =
+        new ConcurrentHashMap<String,String>();
 
 
     /**
@@ -251,10 +252,17 @@ public class ApplicationContext
      * @param name Name of the initialization parameter to retrieve
      */
     public String getInitParameter(final String name) {
+        return parameters.get(name);
+    }
 
-        mergeParameters();
-        return ((String) parameters.get(name));
 
+    public boolean setInitParameter(String name, String value) {
+        if (parameters.containsKey(name)) {
+            return false;
+        }
+        
+        parameters.put(name, value);
+        return true;
     }
 
 
@@ -263,10 +271,7 @@ public class ApplicationContext
      * empty enumeration if the context has no initialization parameters.
      */
     public Enumeration getInitParameterNames() {
-
-        mergeParameters();
         return (new Enumerator(parameters.keySet()));
-
     }
 
 
@@ -867,38 +872,6 @@ public class ApplicationContext
     }
 
 
-    // -------------------------------------------------------- Private Methods
-
-
-    /**
-     * Merge the context initialization parameters specified in the application
-     * deployment descriptor with the application parameters described in the
-     * server configuration, respecting the <code>override</code> property of
-     * the application parameters appropriately.
-     */
-    private void mergeParameters() {
-
-        if (parameters != null)
-            return;
-        Map results = new ConcurrentHashMap();
-        String names[] = context.findParameters();
-        for (int i = 0; i < names.length; i++)
-            results.put(names[i], context.findParameter(names[i]));
-        ApplicationParameter params[] =
-            context.findApplicationParameters();
-        for (int i = 0; i < params.length; i++) {
-            if (params[i].getOverride()) {
-                if (results.get(params[i].getName()) == null)
-                    results.put(params[i].getName(), params[i].getValue());
-            } else {
-                results.put(params[i].getName(), params[i].getValue());
-            }
-        }
-        parameters = results;
-
-    }
-
-
     /**
      * List resource paths (recursively), and store all of them in the given
      * Set.

Modified: tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/StandardContext.java
URL: http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/StandardContext.java?rev=1022117&r1=1022116&r2=1022117&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/StandardContext.java (original)
+++ tomcat/tc6.0.x/trunk/java/org/apache/catalina/core/StandardContext.java Wed Oct 13 14:41:57
2010
@@ -4620,6 +4620,9 @@ public class StandardContext
                 postWelcomeFiles();
             }
             
+            // Set up the context init params
+            mergeParameters();
+
             if (ok) {
                 // Notify our interested LifecycleListeners
                 lifecycle.fireLifecycleEvent(AFTER_START_EVENT, null);
@@ -4725,6 +4728,33 @@ public class StandardContext
 
     
     /**
+     * Merge the context initialization parameters specified in the application
+     * deployment descriptor with the application parameters described in the
+     * server configuration, respecting the <code>override</code> property of
+     * the application parameters appropriately.
+     */
+    private void mergeParameters() {
+        String names[] = findParameters();
+        for (int i = 0; i < names.length; i++) {
+            context.setInitParameter(names[i], findParameter(names[i]));
+        }
+
+        ApplicationParameter params[] = findApplicationParameters();
+        for (int i = 0; i < params.length; i++) {
+            if (params[i].getOverride()) {
+                if (context.getInitParameter(params[i].getName()) == null) {
+                    context.setInitParameter(params[i].getName(),
+                            params[i].getValue());
+                }
+            } else {
+                context.setInitParameter(params[i].getName(),
+                        params[i].getValue());
+            }
+        }
+    }
+
+    
+    /**
      * Stop this Context component.
      *
      * @exception LifecycleException if a shutdown error occurs

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=1022117&r1=1022116&r2=1022117&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml Wed Oct 13 14:41:57 2010
@@ -117,6 +117,10 @@
         via JConsole, if StandardServer.storeConfig() is called when there is
         no StoreConfig implementation present. (markt)
       </fix>
+      <fix>
+        <bug>49987</bug>: Fix potential data race in the population of the
+        Servlet Context initialisation parameters. (markt)
+      </fix>
     </changelog>
   </subsection>
   <subsection name="Coyote">



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