Author: markt
Date: Thu Jul 14 20:00:07 2016
New Revision: 1752738
URL: http://svn.apache.org/viewvc?rev=1752738&view=rev
Log: (empty)
Modified:
tomcat/tc8.5.x/trunk/ (props changed)
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/StandardWrapper.java
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/mbeans-descriptors.xml
tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc8.5.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Jul 14 20:00:07 2016
@@ -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
,1741677,1741892,1741896,1741984,1742023,1742042,1742071,1742090,1742093,1742101,1742105,1742111,1742139,1742146,1742148,1742166,1742181,1742184,1742187,1742246,1742248-1742251,1742263-1742264,1742268,1742276,1742369,1742387,1742448,1742509-1742512,1742917,1742919,1742933,1742975-1742976,1742984,1742986,1743019,1743115,1743117,1743124-1743125,1743134,1743425,1743554,1743679,1743696-1743698,1743700-1743701,1744058,1744064-1744065,1744125,1744194,1744229,1744270,1744323,1744432,1744684,1744697,1744705,1744713,1744760,1744786,1745083,1745142-1745143,1745145,1745177,1745179-1745180,1745227,1745248,1745254,1745337,1745467,1745473,1745576,1745735,1745744,1746304,1746306-1746307,1746319,1746327,1746338,1746340-1746341,1746344,1746427,1746441,1746473,1746490,1746492,1746495-1746496,1746499-1746501,1746503-1746507,1746509,1746549,1746551,1746554,1746556,1746558,1746584,1746620,1746649,1746724,1746939,1746989,1747014,1747028,1747035,1747210,1747225,1747234,1747253,1747404,1747506,1747536,1747
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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
,1741677,1741892,1741896,1741984,1742023,1742042,1742071,1742090,1742093,1742101,1742105,1742111,1742139,1742146,1742148,1742166,1742181,1742184,1742187,1742246,1742248-1742251,1742263-1742264,1742268,1742276,1742369,1742387,1742448,1742509-1742512,1742917,1742919,1742933,1742975-1742976,1742984,1742986,1743019,1743115,1743117,1743124-1743125,1743134,1743425,1743554,1743679,1743696-1743698,1743700-1743701,1744058,1744064-1744065,1744125,1744194,1744229,1744270,1744323,1744432,1744684,1744697,1744705,1744713,1744760,1744786,1745083,1745142-1745143,1745145,1745177,1745179-1745180,1745227,1745248,1745254,1745337,1745467,1745473,1745576,1745735,1745744,1746304,1746306-1746307,1746319,1746327,1746338,1746340-1746341,1746344,1746427,1746441,1746473,1746490,1746492,1746495-1746496,1746499-1746501,1746503-1746507,1746509,1746549,1746551,1746554,1746556,1746558,1746584,1746620,1746649,1746724,1746939,1746989,1747014,1747028,1747035,1747210,1747225,1747234,1747253,1747404,1747506,1747536,1747
924,1747980,1747993,1748001,1748253,1748452,1748547,1748629,1748676,1748715,1749287,1749296,1749328,1749373,1749465,1749506,1749508,1749665-1749666,1749763,1749865-1749866,1749898,1749978,1749980,1750011,1750015,1750056,1750480,1750617,1750634,1750692,1750697,1750700,1750703,1750707,1750714,1750718,1750723,1750899,1750975,1750995,1751061,1751097,1751438,1751447,1751463,1751702,1752212,1752737
Modified:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/StandardWrapper.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/StandardWrapper.java?rev=1752738&r1=1752737&r2=1752738&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/StandardWrapper.java
(original)
+++ tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/StandardWrapper.java Thu
Jul 14 20:00:07 2016
@@ -521,33 +521,22 @@ public class StandardWrapper extends Con
/**
- * @return <code>true</code> if the servlet class represented by this
- * component implements the <code>SingleThreadModel</code> interface.
+ * Does the servlet class represented by this component implement the
+ * <code>SingleThreadModel</code> interface? This can only be determined
+ * once the class is loaded. Calling this method will not trigger loading
+ * the class since that may cause the application to behave unexpectedly.
+ *
+ * @return {@code null} if the class has not been loaded, otherwise {@code
+ * true} if the servlet does implement {@code SingleThreadModel}
and
+ * {@code false} if it does not.
*/
- public boolean isSingleThreadModel() {
-
- // Short-cuts
- // If singleThreadModel is true, must have already checked this
- // If instance != null, must have already loaded
+ public Boolean isSingleThreadModel() {
+ // If the servlet has been loaded either singleThreadModel will be true
+ // or instance will be non-null
if (singleThreadModel || instance != null) {
- return singleThreadModel;
- }
-
- // The logic to determine this safely is more complex than one might
- // expect. allocate() already has the necessary logic so re-use it.
- // Make sure the Servlet is loaded with the right class loader
- ClassLoader oldCL = null;
- try {
- oldCL = ((Context) getParent()).bind(false, null);
- Servlet s = allocate();
- deallocate(s);
- } catch (Throwable t) {
- ExceptionUtils.handleThrowable(t);
- } finally {
- ((Context) getParent()).unbind(false, oldCL);
+ return Boolean.valueOf(singleThreadModel);
}
- return singleThreadModel;
-
+ return null;
}
Modified:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/mbeans-descriptors.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/mbeans-descriptors.xml?rev=1752738&r1=1752737&r2=1752738&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/mbeans-descriptors.xml
(original)
+++ tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/mbeans-descriptors.xml
Thu Jul 14 20:00:07 2016
@@ -1609,7 +1609,7 @@
<attribute name="singleThreadModel"
description="Does this servlet implement the SingleThreadModel
interface?"
- type="boolean"
+ type="java.lang.Boolean"
is="true"
writeable="false" />
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=1752738&r1=1752737&r2=1752738&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml Thu Jul 14 20:00:07 2016
@@ -51,6 +51,13 @@
<bug>59813</bug>: Ensure that circular relations of the Class-Path
attribute from JAR manifests will be processed correctly. (violetagg)
</fix>
+ <fix>
+ Ensure that reading the <code>singleThreadModel</code> attribute of a
+ <code>StandardWrapper</code> via JMX does not trigger initialisation of
+ the associated servlet. With some frameworks this can trigger an
+ unexpected initialisation thread and if initilisation is not
thread-safe
+ the initialisation can then fail. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Jasper">
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