APPARENT DEADLOCK Создание аварийных потоков для неназначенных отложенных задач

Я использую MySQL с MyBatis, и я приветствую эту ошибку на нашем живом сервере

com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@6538f8f2 
-- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!

Я нене понимаю, почему возникает эта ошибка, это из-за моей настройки C3P0? Мои настройки C3P0 такие

---- начало обновлено -----

ниже моя весна-сервлет.xml конфигурации

обновленный боб источника данных как

и из моего класса Дао я вызываю метод Mapper, как

 myDao.updateRecords()

Это мой метод класса обслуживания

@Override
public List selectAllUsersDetail(long groupId, List ids) {

    List usersDetailList = null;

    try {
        usersDetailList = userDao.selectAllUsersDetail(groupId, ids);
    } catch (Exception e) {
        e.printStackTrace();
    }

    return usersDetailList;
}

В классе Дао я просто ввожу картограф.

@Resource
private UserMapper userMapper;

@Override
public List selectAllUsersDetail(long groupId, List ids) {
    return userMapper.selectAllUsersDetail(groupId,ids);
}

--- конец обновлен ------

пожалуйста, дайте мне знать, если требуется какая-либо другая информация.

Это полная трассировка стека

[ WARN] 2013-01-08 20:13:39       com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@70497e11 -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!
[ WARN] 2013-01-08 20:13:39 com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@70497e11 -- APPARENT DEADLOCK!!! Complete Status: 
 Managed Threads: 3
 Active Threads: 3
 Active Tasks: 
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@2e81b8c5 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0)
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@4689a55d (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2)
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@76c7a0d8 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1)
 Pending Tasks: 
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@2c1101d4
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@108f1be6
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@2370a188
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@377cf9e5
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@6dfa45d8
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@49ffa050
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask@2d760a24
    Pool thread stack traces:
 Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0,5,main]
     java.net.SocketInputStream.socketRead0(Native Method)
     java.net.SocketInputStream.read(SocketInputStream.java:150)
     java.net.SocketInputStream.read(SocketInputStream.java:121)
     com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
     com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
     com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
     com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2549)
     com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3002)
     com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2991)
     com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3532)
     com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
     com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)
     com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)
     com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
     com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1557)
     com.mysql.jdbc.DatabaseMetaData$9.forEach(DatabaseMetaData.java:4984)
     com.mysql.jdbc.IterateBlock.doForAll(IterateBlock.java:51)
     com.mysql.jdbc.DatabaseMetaData.getTables(DatabaseMetaData.java:4962)
     com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnectionNoQuery(DefaultConnectionTester.java:185)
     com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnection(DefaultConnectionTester.java:62)
     com.mchange.v2.c3p0.AbstractConnectionTester.activeCheckConnection(AbstractConnectionTester.java:67)
     com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.testPooledConnection(C3P0PooledConnectionPool.java:368)
     com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.refurbishIdleResource(C3P0PooledConnectionPool.java:310)
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask.run(BasicResourcePool.java:1999)
     com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
 Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2,5,main]
     java.net.SocketInputStream.socketRead0(Native Method)
     java.net.SocketInputStream.read(SocketInputStream.java:150)
     java.net.SocketInputStream.read(SocketInputStream.java:121)
     com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
     com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
     com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
     com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2549)
     com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3002)
     com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2991)
     com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3532)
     com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
     com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)
     com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)
     com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
     com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1557)
     com.mysql.jdbc.DatabaseMetaData$9.forEach(DatabaseMetaData.java:4984)
     com.mysql.jdbc.IterateBlock.doForAll(IterateBlock.java:51)
     com.mysql.jdbc.DatabaseMetaData.getTables(DatabaseMetaData.java:4962)
     com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnectionNoQuery(DefaultConnectionTester.java:185)
     com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnection(DefaultConnectionTester.java:62)
     com.mchange.v2.c3p0.AbstractConnectionTester.activeCheckConnection(AbstractConnectionTester.java:67)
     com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.testPooledConnection(C3P0PooledConnectionPool.java:368)
     com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.refurbishIdleResource(C3P0PooledConnectionPool.java:310)
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask.run(BasicResourcePool.java:1999)
     com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
 Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1,5,main]
     java.net.SocketInputStream.socketRead0(Native Method)
     java.net.SocketInputStream.read(SocketInputStream.java:150)
     java.net.SocketInputStream.read(SocketInputStream.java:121)
     com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
     com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
     com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
     com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2549)
     com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3002)
     com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2991)
     com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3532)
     com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
     com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)
     com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)
     com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
     com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1557)
     com.mysql.jdbc.DatabaseMetaData$9.forEach(DatabaseMetaData.java:4984)
     com.mysql.jdbc.IterateBlock.doForAll(IterateBlock.java:51)
     com.mysql.jdbc.DatabaseMetaData.getTables(DatabaseMetaData.java:4962)
     com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnectionNoQuery(DefaultConnectionTester.java:185)
     com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnection(DefaultConnectionTester.java:62)
     com.mchange.v2.c3p0.AbstractConnectionTester.activeCheckConnection(AbstractConnectionTester.java:67)
     com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.testPooledConnection(C3P0PooledConnectionPool.java:368)
     com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.refurbishIdleResource(C3P0PooledConnectionPool.java:310)
     com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask.run(BasicResourcePool.java:1999)
     com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)

--- Обновлено ----

когда я добавил p: StatementCacheNumDeferredCloseThreads = "1" к бину данных я получаю ошибку ниже

     Error creating bean with name 'sqlSessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: 
     Cannot resolve reference to bean 'datasource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'datasource' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: 
   Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'statementCacheNumDeferredCloseThreads' of bean class [com.mchange.v2.c3p0.ComboPooledDataSource]: 
   Bean property 'statementCacheNumDeferredCloseThreads' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?