Author: markt
Date: Thu Dec 18 14:14:50 2014
New Revision: 1646461
URL: http://svn.apache.org/r1646461
Log:
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=57340
Ensure that Socket and SocketWrapper are only returned to the cache once on
socket close (it is possible for multiple threads to call close concurrently).
Modified:
tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/NioEndpoint.java
Modified: tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/NioEndpoint.java
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/NioEndpoint.java?rev=1646461&r1=1646460&r2=1646461&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/NioEndpoint.java
(original)
+++ tomcat/tc8.0.x/trunk/java/org/apache/tomcat/util/net/NioEndpoint.java Thu
Dec 18 14:14:50 2014
@@ -950,15 +950,16 @@ public class NioEndpoint extends Abstrac
addEvent(r);
}
- public void cancelledKey(SelectionKey key, SocketStatus status) {
+ public KeyAttachment cancelledKey(SelectionKey key, SocketStatus
status) {
+ KeyAttachment ka = null;
try {
- if ( key == null ) return;//nothing to do
- KeyAttachment ka = (KeyAttachment) key.attachment();
+ if ( key == null ) return null;//nothing to do
+ ka = (KeyAttachment) key.attachment();
if (ka != null && ka.isComet() && status != null) {
ka.setComet(false);//to avoid a loop
if (status == SocketStatus.TIMEOUT ) {
if (processSocket(ka, status, true)) {
- return; // don't close on comet timeout
+ return null; // don't close on comet timeout
}
} else {
// Don't dispatch if the lines below are cancelling
the key
@@ -1005,6 +1006,7 @@ public class NioEndpoint extends Abstrac
ExceptionUtils.handleThrowable(e);
if (log.isDebugEnabled()) log.error("",e);
}
+ return ka;
}
/**
* The background thread that listens for incoming TCP/IP connections
and
@@ -1559,13 +1561,20 @@ public class NioEndpoint extends Abstrac
// Close socket and pool
try {
ka.setComet(false);
- socket.getPoller().cancelledKey(key,
SocketStatus.ERROR);
- if (running && !paused) {
- nioChannels.push(socket);
- }
- socket = null;
- if (running && !paused) {
- keyCache.push(ka);
+ if (socket.getPoller().cancelledKey(key,
SocketStatus.ERROR) != null) {
+ // SocketWrapper (attachment) was removed from
the
+ // key - recycle both. This can only happen
once
+ // per attempted closure so it is used to
determine
+ // whether or not to return socket and ka to
+ // their respective caches. We do NOT want to
do
+ // this more than once - see BZ 57340.
+ if (running && !paused) {
+ nioChannels.push(socket);
+ }
+ socket = null;
+ if (running && !paused) {
+ keyCache.push(ka);
+ }
}
ka = null;
} catch (Exception x) {
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