Author: markt
Date: Sat Feb 14 16:42:00 2015
New Revision: 1659807
URL: http://svn.apache.org/r1659807
Log:
Fix a concurrency issue in the APR Poller that meant it was possible under low
load for a socket queued to be added to the Poller not to be added for 10
seconds.
Modified:
tomcat/tc8.0.x/trunk/ (props changed)
tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/AprEndpoint.java
tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc8.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Sat Feb 14 16:42:00 2015
@@ -1 +1 @@
-/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
,1644910,1644924,1644929-1644930,1644935,1644989,1645011,1645247,1645355,1645357-1645358,1645455,1645465,1645469,1645471,1645473,1645475,1645486-1645488,1645626,1645641,1645685,1645743,1645763,1645951-1645953,1645955,1645993,1646098-1646106,1646178,1646220,1646302,1646304,1646420,1646470-1646471,1646476,1646559,1646717-1646723,1646773,1647026,1647042,1647530,1647655,1648304,1648815,1648907,1650081,1650365,1651116,1651120,1651280,1651470,1652938,1652970,1653041,1653471,1653550,1653574,1653797,1653815-1653816,1653819,1653840,1653857,1653888,1653972,1654013,1654030,1654050,1654123,1654148,1654159,1654513,1654515,1654517,1654522,1654524,1654725,1654735,1654766,1654785,1654851-1654852,1654978,1655122-1655124,1655126-1655127,1655129-1655130,1655132-1655133,1655312,1655438,1655441,1655454,1655558,1656087,1656299,1656319,1656331,1656345,1656350,1656590,1656648-1656650,1656657,1657041,1657054,1657374,1657492,1657510,1657565,1657580,1657584,1657586,1657589,1657592,1657607,1657609,1657682,1657
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+/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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Modified: tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/AprEndpoint.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/AprEndpoint.java?rev=1659807&r1=1659806&r2=1659807&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/AprEndpoint.java
(original)
+++ tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/AprEndpoint.java Sat
Feb 14 16:42:00 2015
@@ -1661,7 +1661,15 @@ public class AprEndpoint extends Abstrac
maintain();
}
synchronized (this) {
- this.wait(10000);
+ // Make sure that no sockets have been placed in
the
+ // addList or closeList since the check above.
+ // Without this check there could be a 10s pause
+ // with no processing since the notify() call in
+ // add()/close() would have no effect since it
+ // happened before this sync block was entered
+ if (addList.size() < 1 && closeList.size() < 1) {
+ this.wait(10000);
+ }
}
} catch (InterruptedException e) {
// Ignore
@@ -1679,25 +1687,25 @@ public class AprEndpoint extends Abstrac
try {
// Duplicate the add and remove lists so that the syncs are
// minimised
- if (closeList.size() > 0) {
- synchronized (this) {
+ synchronized (this) {
+ if (closeList.size() > 0) {
// Duplicate to another list, so that the syncing
is
// minimal
closeList.duplicate(localCloseList);
closeList.clear();
+ } else {
+ localCloseList.clear();
}
- } else {
- localCloseList.clear();
}
- if (addList.size() > 0) {
- synchronized (this) {
+ synchronized (this) {
+ if (addList.size() > 0) {
// Duplicate to another list, so that the syncing
is
// minimal
addList.duplicate(localAddList);
addList.clear();
+ } else {
+ localAddList.clear();
}
- } else {
- localAddList.clear();
}
// Remove sockets
Modified: tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml?rev=1659807&r1=1659806&r2=1659807&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml Sat Feb 14 16:42:00 2015
@@ -135,6 +135,11 @@
improve the quality of values provided for the
<code>javax.servlet.request.key_size</code> request attribute. (markt)
</update>
+ <fix>
+ Fix a concurrency issue in the APR Poller that meant it was possible
+ under low load for a socket queued to be added to the Poller not to be
+ added for 10 seconds. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Jasper">
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