明显的死锁 为未分配的挂起任务创建紧急线程
我正在将mysql与mybatis一起使用，并且我正在我们的实时服务器上迎接此错误
com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@6538f8f2
-- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!
我不明白为什么会出现这个错误是因为我的C3P0设置吗？我的 C3P0 设置是这样的
----开始更新-----
下面是我的弹簧服务.xml配置
我将数据源更新为
<bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close" p:driverClass="com.mysql.jdbc.Driver"
p:jdbcUrl="jdbc:mysql://localhost/jdb" p:user="root" p:password="root"
p:acquireIncrement="10"
p:idleConnectionTestPeriod="60"
p:maxPoolSize="100"
p:maxStatements="0"
p:minPoolSize="10"
p:initialPoolSize="10"
p:statementCacheNumDeferredCloseThreads="1" />
<!-- Declare a transaction manager -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="datasource" />
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="datasource" />
</bean>
<!-- scan for mappers and will automatically scan the whole classpath for xmls -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
<property name="basePackage" value="com.mycom.myproject.db.mybatis.dao" />
</bean>
从我的道类中，我称之为映射器方法，如
myDao.updateRecords()
这是我的服务类方法
@Override
public List<UserDetailedBean> selectAllUsersDetail(long groupId, List<Long> ids) {
List<UserDetailedBean> usersDetailList = null;
try {
usersDetailList = userDao.selectAllUsersDetail(groupId, ids);
} catch (Exception e) {
e.printStackTrace();
}
return usersDetailList;
}
在道课上，我只是注入映射器。
@Resource
private UserMapper userMapper;
@Override
public List<UserDetailedBean> selectAllUsersDetail(long groupId, List<Long> ids) {
return userMapper.selectAllUsersDetail(groupId,ids);
}
---已更新------
如果需要任何其他信息，请告诉我。
这是完整的堆栈跟踪
[ WARN] 2013-01-08 20:13:39 com.mchange.v2.async.ThreadPoolAsynchronousRunner$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)
---已更新----
当我添加p：statementCacheNumDeferredCloseThreads=“1”到datasouce bean时，我得到了下面的错误
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?
