Author: markt
Date: Mon Aug 17 07:30:59 2015
New Revision: 1696200
URL: http://svn.apache.org/r1696200
Log:
Fix https://bz.apache.org/bugzilla/show_bug.cgi?id=58157
Ensure that the handling of async timeouts does not result in an unnecessary
dispatch to a container thread that could result in the current socket being
added to the Poller multiple times and multiple attempts to process the same
event for the same socket.
Modified:
tomcat/tc8.0.x/trunk/ (props changed)
tomcat/tc8.0.x/trunk/java/org/apache/coyote/AsyncStateMachine.java
tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc8.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Mon Aug 17 07:30:59 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
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2,1687261,1687268,1687340,1688563,1688841,1688878,1688885,1688896,1688901,1689345-1689346,1689357,1689656,1689675-1689677,1689679,1689687,1689825,1689856,1689918,1690011,1690021,1690054,1690080,1690209,1691134,1691487,1691813,1692744-1692747,1692849,1693088,1693105,1693429,1693461,1694058,1694111,1694290,1694501,1694548,1694658,1694660,1694788,1694872,1694878,1695006,1695354,1695371,1695459,1695582,1695706,1695778
+/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/coyote/AsyncStateMachine.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/coyote/AsyncStateMachine.java?rev=1696200&r1=1696199&r2=1696200&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/java/org/apache/coyote/AsyncStateMachine.java [UTF-8]
(original)
+++ tomcat/tc8.0.x/trunk/java/org/apache/coyote/AsyncStateMachine.java [UTF-8]
Mon Aug 17 07:30:59 2015
@@ -73,20 +73,20 @@ import org.apache.tomcat.util.security.P
* | | | | | | |
/-----------| |
* | | | ^ |dispatch() | | /
|
* | | | | | | | /
|
- * | | | | \|/ / \|/ /
postProcess() |
- * | | | | MUST_DISPATCH /
STARTED«---------«---------| |
- * | | | | | / / | |
| |
- * | | | | |postProcess() / / | |
^ |
- * ^ | ^ | | / / |
|asyncOperation() | |
- * | | | | | / / | |
| |
- * | | | | | |---------- / ----------/ |
|--READ_WRITE_OP--»---| |
- * | | | | | | / dispatch() |
| | | |
- * | | | | | | |-----/ auto|
| | | error()|
- * | | | | auto \|/ \|/ \|/ |
dispatch()| | |-»--------|
- * | | | |---«------DISPATCHING«--------«------------- |
------«----| |
- * | | | /|\ |
|
+ * | | | | \|/ | \|/ /
postProcess() |
+ * | | | |----«----MUST_DISPATCH-----«-----|
STARTED«---------«---------| |
+ * | | | | auto /|\ / | |
| |
+ * | | | | | / | |
^ |
+ * ^ | ^ | | / |
|asyncOperation() | |
+ * | | | ^ | / | |
| |
+ * | | | | | |-------------/ |
|--READ_WRITE_OP--»---| |
+ * | | | | | | dispatch() |
| | | |
+ * | | | | | | auto|
| | | error()|
+ * | | | | auto | \|/ |
dispatch()| | |-»--------|
+ * | | | |---«---------- | ---DISPATCHING«-----«------ |
------«----| |
+ * | | | | |
|
* | | | | dispatch() \|/
|
- * | | | |-----------------------TIMING_OUT
|
+ * | | | |-----------«-----------TIMING_OUT
|
* | | | | |
|
* | | |-------«----------------------------------«------| |
|
* | | complete() |
|
@@ -296,7 +296,11 @@ public class AsyncStateMachine {
public synchronized boolean asyncDispatch() {
pauseNonContainerThread();
boolean doDispatch = false;
- if (state == AsyncState.STARTING) {
+ if (state == AsyncState.STARTING ||
+ state == AsyncState.TIMING_OUT ||
+ state == AsyncState.ERROR) {
+ // In these three cases processing is on a container thread so no
+ // need to transfer processing to a new container thread
state = AsyncState.MUST_DISPATCH;
} else if (state == AsyncState.STARTED) {
state = AsyncState.DISPATCHING;
@@ -307,9 +311,7 @@ public class AsyncStateMachine {
// request/response associated with the AsyncContext so need a new
// container thread to process the different request/response.
doDispatch = true;
- } else if (state == AsyncState.READ_WRITE_OP ||
- state == AsyncState.TIMING_OUT ||
- state == AsyncState.ERROR) {
+ } else if (state == AsyncState.READ_WRITE_OP) {
state = AsyncState.DISPATCHING;
// If on a container thread then the socket will be added to the
// poller poller when the thread exits the
@@ -328,7 +330,8 @@ public class AsyncStateMachine {
public synchronized void asyncDispatched() {
- if (state == AsyncState.DISPATCHING) {
+ if (state == AsyncState.DISPATCHING ||
+ state == AsyncState.MUST_DISPATCH) {
state = AsyncState.DISPATCHED;
} else {
throw new IllegalStateException(
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=1696200&r1=1696199&r2=1696200&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml Mon Aug 17 07:30:59 2015
@@ -153,6 +153,13 @@
correctly set before adding the socket back to the poller for read.
(markt)
</fix>
+ <fix>
+ <bug>58157</bug>: Ensure that the handling of async timeouts does not
+ result in an unnecessary dispatch to a container thread that could
+ result in the current socket being added to the Poller multiple times
+ with multiple attempts to process the same event for the same socket.
+ (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Jasper">
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