Author: markt
Date: Wed Aug 12 11:41:17 2009
New Revision: 803459

URL: http://svn.apache.org/viewvc?rev=803459&view=rev
Log:
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=41661
Thread safety issue in JspConfig.init() seen in production

Modified:
    tomcat/tc6.0.x/trunk/   (props changed)
    tomcat/tc6.0.x/trunk/STATUS.txt
    tomcat/tc6.0.x/trunk/java/org/apache/jasper/compiler/JspConfig.java
    tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml

Propchange: tomcat/tc6.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Wed Aug 12 11:41:17 2009
@@ -1 +1 @@
-/tomcat/trunk:601180,606992,612607,630314,640888,652744,653247,673796,673820,683982,684001,684081,684234,684269-684270,685177,687503,687645,689402,690781,691392,691805,692748,693378,694992,695053,695311,696780,696782,698012,698227,698236,698613,699427,699634,701355,709294,709811,709816,710063,710066,710125,710205,711126,711600,712461,712467,718360,719119,719124,719602,719626,719628,720046,720069,721040,721286,721708,721886,723404,723738,726052,727303,728032,728768,728947,729057,729567,729569,729571,729681,729809,729815,729934,730250,730590,731651,732859,732863,734734,740675,740684,742677,742697,742714,744160,744238,746321,746384,746425,747834,747863,748344,750258,750291,750921,751286-751287,751289,751295,753039,757335,757774,758365,758596,758616,758664,759074,761601,762868,762929,762936-762937,763166,763183,763193,763228,763262,763298,763302,763325,763599,763611,763654,763681,763706,764985,764997,765662,768335,769979,770716,770809,770876,776921,776924,776935,776945,777464,77
 
7466,777576,777625,778379,778523-778524,781528,781779,782145,782791,783316,783696,783724,783756,783762,783766,783863,783934,784453,784602,784614,785381,785688,785768,785859,786468,786487,786490,786496,786667,787627,787770,787985,790405,791041,791184,791194,791243,791326,791328,791789,792740,793372,793757,793882,793981,794082,794673,794822,795043,795152,795457
+/tomcat/trunk:601180,606992,612607,630314,640888,652744,653247,673796,673820,683982,684001,684081,684234,684269-684270,685177,687503,687645,689402,690781,691392,691805,692748,693378,694992,695053,695311,696780,696782,698012,698227,698236,698613,699427,699634,701355,709294,709811,709816,710063,710066,710125,710205,711126,711600,712461,712467,718360,719119,719124,719602,719626,719628,720046,720069,721040,721286,721708,721886,723404,723738,726052,727303,728032,728768,728947,729057,729567,729569,729571,729681,729809,729815,729934,730250,730590,731651,732859,732863,734734,740675,740684,742677,742697,742714,744160,744238,746321,746384,746425,747834,747863,748344,750258,750291,750921,751286-751287,751289,751295,753039,757335,757774,758365,758596,758616,758664,759074,761601,762868,762929,762936-762937,763166,763183,763193,763228,763262,763298,763302,763325,763599,763611,763654,763681,763706,764985,764997,765662,768335,769979,770716,770809,770876,776921,776924,776935,776945,777464,77
 
7466,777576,777625,778379,778523-778524,781528,781779,782145,782791,783316,783696,783724,783756,783762,783766,783863,783934,784453,784602,784614,785381,785688,785768,785859,786468,786487,786490,786496,786667,787627,787770,787985,790405,791041,791184,791194,791243,791326,791328,791789,792740,793372,793757,793882,793981,794082,794673,794822,795043,795152,795210,795457

Modified: tomcat/tc6.0.x/trunk/STATUS.txt
URL: 
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/STATUS.txt?rev=803459&r1=803458&r2=803459&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/STATUS.txt (original)
+++ tomcat/tc6.0.x/trunk/STATUS.txt Wed Aug 12 11:41:17 2009
@@ -150,12 +150,6 @@
   +1: fhanik, kkolinko, markt
   -1: 
 
-* Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=41661
-  Thread safety issue in JspConfig.init() seen in production
-  http://svn.apache.org/viewvc?rev=795210&view=rev
-  +1: markt, kkolinko, rjung
-  -1: 
-
 * Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=47413
   First part of a composite EL expression "${a}${b}" was not coerced to String
   Without coercion, the concatenation of ((Object)null) + string results in

Modified: tomcat/tc6.0.x/trunk/java/org/apache/jasper/compiler/JspConfig.java
URL: 
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/jasper/compiler/JspConfig.java?rev=803459&r1=803458&r2=803459&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/java/org/apache/jasper/compiler/JspConfig.java 
(original)
+++ tomcat/tc6.0.x/trunk/java/org/apache/jasper/compiler/JspConfig.java Wed Aug 
12 11:41:17 2009
@@ -48,7 +48,7 @@
 
     private Vector jspProperties = null;
     private ServletContext ctxt;
-    private boolean initialized = false;
+    private volatile boolean initialized = false;
 
     private String defaultIsXml = null;                // unspecified
     private String defaultIsELIgnored = null;  // unspecified
@@ -217,13 +217,17 @@
     private void init() throws JasperException {
 
         if (!initialized) {
-            processWebDotXml(ctxt);
-            defaultJspProperty = new JspProperty(defaultIsXml,
-                    defaultIsELIgnored,
-                    defaultIsScriptingInvalid,
-                    null, null, null, defaultDeferedSyntaxAllowedAsLiteral, 
-                    defaultTrimDirectiveWhitespaces);
-            initialized = true;
+            synchronized (this) {
+                if (!initialized) {
+                    processWebDotXml(ctxt);
+                    defaultJspProperty = new JspProperty(defaultIsXml,
+                            defaultIsELIgnored,
+                            defaultIsScriptingInvalid,
+                            null, null, null, 
defaultDeferedSyntaxAllowedAsLiteral, 
+                            defaultTrimDirectiveWhitespaces);
+                    initialized = true;
+                }
+            }
         }
     }
 

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=803459&r1=803458&r2=803459&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml Wed Aug 12 11:41:17 2009
@@ -172,6 +172,9 @@
         debugging. (markt)
       </fix>
       <fix>
+        <bug>41661</bug>: Fix thread safety issue with JspConfig.init() (markt)
+      </fix>
+      <fix>
         <bug>47318</bug>: Process directives found in include preludes and
         codas. (markt)
       </fix>



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