Author: markt
Date: Wed Apr 6 20:35:30 2016
New Revision: 1738052
URL: http://svn.apache.org/viewvc?rev=1738052&view=rev
Log:
Fix https://bz.apache.org/bugzilla/show_bug.cgi?id=59269
Correct the implementation of PersistentManagerBase so that minIdleSwap
functions as designed and sessions are swapped out to keep the active session
count below maxActiveSessions
Modified:
tomcat/tc6.0.x/trunk/ (props changed)
tomcat/tc6.0.x/trunk/java/org/apache/catalina/session/PersistentManagerBase.java
tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml
tomcat/tc6.0.x/trunk/webapps/docs/config/manager.xml
Propchange: tomcat/tc6.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Wed Apr 6 20:35:30 2016
@@ -1,4 +1,4 @@
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094069,1094089,1095138,1097899,1099575,1099586,1099772,1099789,1100145,1100822,1101094,1101144,1124680,1130774,1133014,1137862,1137996,1138950,1138953,1139280,1140693,1141104,1141441,1142043,1142904,1143134,1143150,1145137,1148216,1148471,1152601,1156171,1156519,1164567,1167394,1172233-1172234,1172236,1173614,1174353,1174882,1174884,1175158,1175190,1176799,1177125,1177245,1177850,1177862,1178228,1178233,1178684,1181028,1181136,1184917,1184919,1185200,1185588,1186011,1186104,1186123,1186137,1186153,1186378,1186712,1186763,1186949,1187381,1189240,1189386,1190388-1190389,1190474,1198622,1201576,1203091,1224801,1233426,1243034,1243038,1244567,1298140,1298628-1298629,1304468,1311997,1331766,1333161,1333173,1342498,1342503,1348425,1348461-1348495,1348989,1350294,1351056,1351636-1351640,1352011,1354685,1354847,1354856,1356125,1359981,1371283,1409007,1413552,1413556,1413562,1417282,1430079,1430481,1430567,1435606,1435636,1435642,1438411,1439054,1441348,1446640,1446650,1447012,1453105,145311
2,1456666-1456678,1456713,1456721,1457968,1460342,1460533,1484862,1486875,1492570,1494143,1500062,1503851,1505843,1513148-1513149,1526469,1533312,1536520,1539157,1539173,1540374,1552804,1555163,1558811,1561054-1561065,1561067-1561070,1561072-1561075,1561083,1561190-1561192,1561635,1561640,1561732,1562742,1562746,1564309,1564312,1568921,1574004,1577315,1577324,1577463,1578812-1578813,1586658,1586894,1586959,1588193,1588197,1589737-1589738,1589763,1589837,1589842,1589980,1590018,1590302,1590646,1590648,1590835,1590842,1590911,1593259,1593261,1593335,1593834,1594229,1595171,1595289,1597532,1600955,1600963,1600978,1600984,1601329-1601330,1601332,1601855,1608963,1609061,1609593,1617362,1617365,1617383,1617456,1623392,1624247,1626579,1627033,1628978,1631155,1631520,1632584,1634117,1634130,1637684,1637695,1640655-1640658,1641656,1641660,1641692,1641707-1641718,1641721-1641722,1642564,1642606,1643045,1643054,1643570,1644017,1648815,1656299,1658799,1658802,1659521,1663995,1664174,1665085,166
6966,1666985,1668630,1669800,1676552,1681837-1681838,1681854,1685826,1687242,1689918,1693105,1694290,1694872,1696378,1701940,1710346,1712617,1712654,1713871,1713997,1714002,1715188,1715206,1716213-1716214,1716413,1716640,1716856,1716858,1716881-1716882,1716886,1716894,1720234,1720394,1720439,1720462,1721812,1721881,1722532,1722799,1722807,1722824,1722828-1722829,1722831,1722859,1723127,1723707,1723736,1724427,1724433,1724673,1724788,1724863,1725113,1725183,1725199,1725202,1725204,1725207,1725263-1725264,1725266,1725278,1725282,1725405,1725646,1725649-1725652,1725696-1725697,1725914,1725926,1726177,1726202,1726628,1726676,1726926,1727162,1727670,1727899,1728448,1729361,1731008,1731953,1731976,1732359,1733940,1734113,1734128,1734192,1737119,1737715,1737834,1737959,1738039,1738043
Modified:
tomcat/tc6.0.x/trunk/java/org/apache/catalina/session/PersistentManagerBase.java
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/catalina/session/PersistentManagerBase.java?rev=1738052&r1=1738051&r2=1738052&view=diff
==============================================================================
---
tomcat/tc6.0.x/trunk/java/org/apache/catalina/session/PersistentManagerBase.java
(original)
+++
tomcat/tc6.0.x/trunk/java/org/apache/catalina/session/PersistentManagerBase.java
Wed Apr 6 20:35:30 2016
@@ -5,9 +5,9 @@
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
- *
+ *
* http://www.apache.org/licenses/LICENSE-2.0
- *
+ *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -64,68 +64,68 @@ public abstract class PersistentManagerB
private class PrivilegedStoreClear
implements PrivilegedExceptionAction {
- PrivilegedStoreClear() {
+ PrivilegedStoreClear() {
}
public Object run() throws Exception{
store.clear();
return null;
- }
- }
-
+ }
+ }
+
private class PrivilegedStoreRemove
implements PrivilegedExceptionAction {
- private String id;
-
- PrivilegedStoreRemove(String id) {
+ private String id;
+
+ PrivilegedStoreRemove(String id) {
this.id = id;
}
public Object run() throws Exception{
store.remove(id);
return null;
- }
- }
-
+ }
+ }
+
private class PrivilegedStoreLoad
implements PrivilegedExceptionAction {
- private String id;
-
- PrivilegedStoreLoad(String id) {
+ private String id;
+
+ PrivilegedStoreLoad(String id) {
this.id = id;
}
public Object run() throws Exception{
return store.load(id);
- }
- }
-
+ }
+ }
+
private class PrivilegedStoreSave
implements PrivilegedExceptionAction {
- private Session session;
-
- PrivilegedStoreSave(Session session) {
+ private Session session;
+
+ PrivilegedStoreSave(Session session) {
this.session = session;
}
public Object run() throws Exception{
store.save(session);
return null;
- }
- }
-
+ }
+ }
+
private class PrivilegedStoreKeys
implements PrivilegedExceptionAction {
- PrivilegedStoreKeys() {
+ PrivilegedStoreKeys() {
}
public Object run() throws Exception{
return store.keys();
- }
+ }
}
// ----------------------------------------------------- Instance Variables
@@ -182,16 +182,18 @@ public abstract class PersistentManagerB
/**
- * Minimum time a session must be idle before it is swapped to disk.
- * This overrides maxActiveSessions, to prevent thrashing if there are lots
- * of active sessions. Setting to -1 means it's ignored.
+ * The minimum time in seconds a session must be idle before it is eligible
+ * to be swapped to disk to keep the active session count below
+ * maxActiveSessions. Setting to {@code -1} means sessions will not be
+ * swapped out to keep the active session count down.
*/
protected int minIdleSwap = -1;
+
/**
- * The maximum time a session may be idle before it should be swapped
- * to file just on general principle. Setting this to -1 means sessions
- * should not be forced out.
+ * The maximum time in seconds a session may be idle before it is eligible
+ * to be swapped to disk due to inactivity. Setting this to {@code -1}
means
+ * sessions should not be swapped out just because of inactivity.
*/
protected int maxIdleSwap = -1;
@@ -217,8 +219,8 @@ public abstract class PersistentManagerB
// ------------------------------------------------------------- Properties
-
-
+
+
/**
@@ -267,19 +269,20 @@ public abstract class PersistentManagerB
/**
- * The time in seconds after which a session should be swapped out of
- * memory to disk.
+ * @return The maximum time in seconds a session may be idle before it is
+ * eligible to be swapped to disk due to inactivity. A value of {@code -1}
+ * means sessions should not be swapped out just because of inactivity.
*/
public int getMaxIdleSwap() {
-
return maxIdleSwap;
-
}
/**
- * Sets the time in seconds after which a session should be swapped out of
- * memory to disk.
+ * Sets the maximum time in seconds a session may be idle before it is
+ * eligible to be swapped to disk due to inactivity. Setting this to
+ * {@code -1} means sessions should not be swapped out just because of
+ * inactivity.
*/
public void setMaxIdleSwap(int max) {
@@ -290,26 +293,25 @@ public abstract class PersistentManagerB
support.firePropertyChange("maxIdleSwap",
new Integer(oldMaxIdleSwap),
new Integer(this.maxIdleSwap));
-
}
/**
- * The minimum time in seconds that a session must be idle before
- * it can be swapped out of memory, or -1 if it can be swapped out
- * at any time.
+ * @return The minimum time in seconds a session must be idle before it is
+ * eligible to be swapped to disk to keep the active session count below
+ * maxActiveSessions. A value of {@code -1} means sessions will not be
+ * swapped out to keep the active session count down.
*/
public int getMinIdleSwap() {
-
return minIdleSwap;
-
}
/**
- * Sets the minimum time in seconds that a session must be idle before
- * it can be swapped out of memory due to maxActiveSession. Set it to -1
- * if it can be swapped out at any time.
+ * Sets the minimum time in seconds a session must be idle before it is
+ * eligible to be swapped to disk to keep the active session count below
+ * maxActiveSessions. Setting to {@code -1} means sessions will not be
+ * swapped out to keep the active session count down.
*/
public void setMinIdleSwap(int min) {
@@ -328,7 +330,7 @@ public abstract class PersistentManagerB
* Set the Container with which this Manager has been associated. If it
is a
* Context (the usual case), listen for changes to the session timeout
* property.
- *
+ *
* @param container
* The associated Container
*/
@@ -408,7 +410,7 @@ public abstract class PersistentManagerB
}
- /**
+ /**
* Number of session creations that failed due to maxActiveSessions.
*
* @return The count
@@ -417,7 +419,7 @@ public abstract class PersistentManagerB
return rejectedSessions;
}
-
+
public void setRejectedSessions(int rejectedSessions) {
this.rejectedSessions = rejectedSessions;
}
@@ -522,7 +524,7 @@ public abstract class PersistentManagerB
if (store == null)
return;
- try {
+ try {
if (SecurityUtil.isPackageProtectionEnabled()){
try{
AccessController.doPrivileged(new PrivilegedStoreClear());
@@ -545,7 +547,7 @@ public abstract class PersistentManagerB
* Implements the Manager interface, direct call to processExpires and
processPersistenceChecks
*/
public void processExpires() {
-
+
long timeNow = System.currentTimeMillis();
Session sessions[] = findSessions();
int expireHere = 0 ;
@@ -561,12 +563,12 @@ public abstract class PersistentManagerB
if ((getStore() != null) && (getStore() instanceof StoreBase)) {
((StoreBase) getStore()).processExpires();
}
-
+
long timeEnd = System.currentTimeMillis();
if(log.isDebugEnabled())
log.debug("End expire sessions " + getName() + " processingTime "
+ (timeEnd - timeNow) + " expired sessions: " + expireHere);
processingTime += (timeEnd - timeNow);
-
+
}
@@ -705,13 +707,13 @@ public abstract class PersistentManagerB
}
}
-
+
/**
* Remove this Session from the active Sessions for this Manager,
* and from the Store.
*
* @param id Session's id to be removed
- */
+ */
protected void removeSession(String id){
try {
if (SecurityUtil.isPackageProtectionEnabled()){
@@ -724,10 +726,10 @@ public abstract class PersistentManagerB
}
} else {
store.remove(id);
- }
+ }
} catch (IOException e) {
log.error("Exception removing session " + e.getMessage(), e);
- }
+ }
}
/**
@@ -913,7 +915,7 @@ public abstract class PersistentManagerB
}
} else {
store.save(session);
- }
+ }
} catch (IOException e) {
log.error(sm.getString
("persistentManager.serializeError", session.getIdInternal(),
e));
@@ -939,7 +941,7 @@ public abstract class PersistentManagerB
/**
- * Get the lifecycle listeners associated with this lifecycle. If this
+ * Get the lifecycle listeners associated with this lifecycle. If this
* Lifecycle has no listeners registered, a zero-length array is returned.
*/
public LifecycleListener[] findLifecycleListeners() {
@@ -978,7 +980,7 @@ public abstract class PersistentManagerB
}
if( ! initialized )
init();
-
+
lifecycle.fireLifecycleEvent(START_EVENT, null);
started = true;
@@ -1015,7 +1017,7 @@ public abstract class PersistentManagerB
log.info(sm.getString("standardManager.notStarted"));
return;
}
-
+
lifecycle.fireLifecycleEvent(STOP_EVENT, null);
setStarted(false);
@@ -1130,7 +1132,9 @@ public abstract class PersistentManagerB
Session sessions[] = findSessions();
// FIXME: Smarter algorithm (LRU)
- if (getMaxActiveSessions() >= sessions.length)
+ int limit = (int) (getMaxActiveSessions() * 0.9);
+
+ if (limit >= sessions.length)
return;
if(log.isDebugEnabled())
@@ -1138,7 +1142,7 @@ public abstract class PersistentManagerB
("persistentManager.tooManyActive",
new Integer(sessions.length)));
- int toswap = sessions.length - getMaxActiveSessions();
+ int toswap = sessions.length - limit;
long timeNow = System.currentTimeMillis();
for (int i = 0; i < sessions.length && toswap > 0; i++) {
@@ -1194,7 +1198,7 @@ public abstract class PersistentManagerB
log.debug(sm.getString
("persistentManager.backupMaxIdle",
session.getIdInternal(), new
Integer(timeIdle)));
-
+
try {
writeSession(session);
} catch (IOException e) {
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=1738052&r1=1738051&r2=1738052&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/changelog.xml Wed Apr 6 20:35:30 2016
@@ -66,6 +66,12 @@
related memory leaks when the key class but not the value class has
been
loaded by the web application class loader. (markt)
</fix>
+ <fix>
+ <bug>59269</bug>: Correct the implementation of
+ <code>PersistentManagerBase</code> so that <code>minIdleSwap</code>
+ functions as designed and sessions are swapped out to keep the active
+ session count below <code>maxActiveSessions</code>. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Coyote">
Modified: tomcat/tc6.0.x/trunk/webapps/docs/config/manager.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/config/manager.xml?rev=1738052&r1=1738051&r2=1738052&view=diff
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/config/manager.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/config/manager.xml Wed Apr 6 20:35:30
2016
@@ -274,21 +274,21 @@
</attribute>
<attribute name="maxIdleSwap" required="false">
- <p>The time interval (in seconds) since the last access to a session
- before it should be persisted to the session store, and
- passivated out of the server's memory, or <code>-1</code> to disable
- this feature. If this feature is enabled, the time interval specified
- here should be equal to or longer than the value specified for
- <code>maxIdleBackup</code>. By default, this feature is disabled.</p>
+ <p>The maximum time a session may be idle before it is eligible to be
+ swapped to disk due to inactivity. Setting this to <code>-1</code>
means
+ sessions should not be swapped out just because of inactivity. If this
+ feature is enabled, the time interval specified here should be equal to
+ or longer than the value specified for <code>maxIdleBackup</code>. By
+ default, this feature is disabled.</p>
</attribute>
<attribute name="minIdleSwap" required="false">
- <p>The time interval (in seconds) since the last access to a session
- before it will be eligible to be persisted to the session store, and
- passivated out of the server's memory, or <code>-1</code> for this
- swapping to be available at any time. If specified, this value should
- be less than that specified by <code>maxIdleSwap</code>. By default,
- this value is set to <code>-1</code>.</p>
+ <p>The minimum time in seconds a session must be idle before it is
+ eligible to be swapped to disk to keep the active session count below
+ maxActiveSessions. Setting to <code>-1</code> means sessions will not
be
+ swapped out to keep the active session count down. If specified, this
+ value should be less than that specified by <code>maxIdleSwap</code>.
+ By default, this value is set to <code>-1</code>.</p>
</attribute>
<attribute name="maxInactiveInterval" required="false">
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