Author: markt Date: Mon Dec 8 13:28:01 2014 New Revision: 1643815 URL: http://svn.apache.org/r1643815 Log: Update fork of Apache Commons Pool2 to latest trunk to pick up fixes including one for a potential infinite loop.
Modified: tomcat/tc8.0.x/trunk/ (props changed) tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/ (props changed) tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/BaseGenericObjectPool.java tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/DefaultPooledObject.java tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/LinkedBlockingDeque.java tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml Propchange: tomcat/tc8.0.x/trunk/ ------------------------------------------------------------------------------ --- svn:mergeinfo (original) +++ svn:mergeinfo Mon Dec 8 13:28:01 2014 @@ -1 +1 @@ -/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1643002,1643045,1643054-1643055,1643066,1643121,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766 +/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1643002,1643045,1643054-1643055,1643066,1643121,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814 Propchange: tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/ ------------------------------------------------------------------------------ --- svn:mergeinfo (original) +++ svn:mergeinfo Mon Dec 8 13:28:01 2014 @@ -1 +1,2 @@ -/commons/proper/pool/trunk/src/main/java/org/apache/commons/pool2:1593516-1627271 +/commons/proper/pool/trunk/src/main/java/org/apache/commons/pool2:1593516-1643813 +/tomcat/trunk/java/org/apache/tomcat/dbcp/pool2:1643814 Modified: tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/BaseGenericObjectPool.java URL: http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/BaseGenericObjectPool.java?rev=1643815&r1=1643814&r2=1643815&view=diff ============================================================================== --- tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/BaseGenericObjectPool.java (original) +++ tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/BaseGenericObjectPool.java Mon Dec 8 13:28:01 2014 @@ -111,8 +111,7 @@ public abstract class BaseGenericObjectP private final StatsStore activeTimes = new StatsStore(MEAN_TIMING_STATS_CACHE_SIZE); private final StatsStore idleTimes = new StatsStore(MEAN_TIMING_STATS_CACHE_SIZE); private final StatsStore waitTimes = new StatsStore(MEAN_TIMING_STATS_CACHE_SIZE); - private final Object maxBorrowWaitTimeMillisLock = new Object(); - private volatile long maxBorrowWaitTimeMillis = 0; // @GuardedBy("maxBorrowWaitTimeMillisLock") + private final AtomicLong maxBorrowWaitTimeMillis = new AtomicLong(0L); private volatile SwallowedExceptionListener swallowedExceptionListener = null; @@ -809,7 +808,7 @@ public abstract class BaseGenericObjectP * @return maximum wait time in milliseconds since the pool was created */ public final long getMaxBorrowWaitTimeMillis() { - return maxBorrowWaitTimeMillis; + return maxBorrowWaitTimeMillis.get(); } /** @@ -873,11 +872,15 @@ public abstract class BaseGenericObjectP borrowedCount.incrementAndGet(); idleTimes.add(p.getIdleTimeMillis()); waitTimes.add(waitTime); - synchronized (maxBorrowWaitTimeMillisLock) { - if (waitTime > maxBorrowWaitTimeMillis) { - maxBorrowWaitTimeMillis = waitTime; + + // lock-free optimistic-locking maximum + long currentMax; + do { + currentMax = maxBorrowWaitTimeMillis.get(); + if (currentMax >= waitTime) { + break; } - } + } while (!maxBorrowWaitTimeMillis.compareAndSet(currentMax, waitTime)); } /** @@ -1039,12 +1042,21 @@ public abstract class BaseGenericObjectP } } + /** + * Maintains a cache of values for a single metric and reports + * statistics on the cached values. + */ private class StatsStore { private final AtomicLong values[]; private final int size; private int index; + /** + * Create a StatsStore with the given cache size. + * + * @param size number of values to maintain in the cache. + */ public StatsStore(int size) { this.size = size; values = new AtomicLong[size]; @@ -1053,6 +1065,12 @@ public abstract class BaseGenericObjectP } } + /** + * Adds a value to the cache. If the cache is full, one of the + * existing values is replaced by the new value. + * + * @param value new value to add to the cache. + */ public synchronized void add(long value) { values[index].set(value); index++; @@ -1061,6 +1079,11 @@ public abstract class BaseGenericObjectP } } + /** + * Returns the mean of the cached values. + * + * @return the mean of the cache, truncated to long + */ public long getMean() { double result = 0; int counter = 0; @@ -1073,7 +1096,6 @@ public abstract class BaseGenericObjectP } } return (long) result; - } } } Modified: tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/DefaultPooledObject.java URL: http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/DefaultPooledObject.java?rev=1643815&r1=1643814&r2=1643815&view=diff ============================================================================== --- tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/DefaultPooledObject.java (original) +++ tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/DefaultPooledObject.java Mon Dec 8 13:28:01 2014 @@ -289,7 +289,7 @@ public class DefaultPooledObject<T> impl private static final long serialVersionUID = 7398692158058772916L; /** Date format */ - //@GuardedBy("this") + //@GuardedBy("format") private static final SimpleDateFormat format = new SimpleDateFormat ("'Pooled object created' yyyy-MM-dd HH:mm:ss Z " + "'by the following code has not been returned to the pool:'"); Modified: tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/LinkedBlockingDeque.java URL: http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/LinkedBlockingDeque.java?rev=1643815&r1=1643814&r2=1643815&view=diff ============================================================================== --- tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/LinkedBlockingDeque.java (original) +++ tomcat/tc8.0.x/trunk/java/org/apache/tomcat/dbcp/pool2/impl/LinkedBlockingDeque.java Mon Dec 8 13:28:01 2014 @@ -1226,23 +1226,33 @@ class LinkedBlockingDeque<E> extends Abs } /** + * Returns the successor node of the given non-null, but + * possibly previously deleted, node. + */ + private Node<E> succ(Node<E> n) { + // Chains of deleted nodes ending in null or self-links + // are possible if multiple interior nodes are removed. + for (;;) { + Node<E> s = nextNode(n); + if (s == null) + return null; + else if (s.item != null) + return s; + else if (s == n) + return firstNode(); + else + n = s; + } + } + + /** * Advances next. */ void advance() { lock.lock(); try { // assert next != null; - Node<E> s = nextNode(next); - if (s == next) { - next = firstNode(); - } else { - // Skip over removed nodes. - // May be necessary if multiple interior Nodes are removed. - while (s != null && s.item == null) { - s = nextNode(s); - } - next = s; - } + next = succ(next); nextItem = next == null ? null : next.item; } finally { lock.unlock(); 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=1643815&r1=1643814&r2=1643815&view=diff ============================================================================== --- tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml (original) +++ tomcat/tc8.0.x/trunk/webapps/docs/changelog.xml Mon Dec 8 13:28:01 2014 @@ -243,6 +243,11 @@ project that uses Java 7 compliance settings instead of workspace-wide defaults. (kkolinko) </fix> + <fix> + Update the package renamed copy of Apache Commons Pool 2 to revision + 1643813 to pick up additional fixes since the 2.2 release including + one for a possible infinite loop. (markt) + </fix> </changelog> </subsection> </section> --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org