我发现这个线程在使用c3p0数据源的spring集成应用程序中一直存在。你能否告诉我这可能是什么原因，谢谢
"lookupTaskExecutor-1" - Thread t@57 java.lang.Thread.State: WAITING
at java.lang.Object.wait(Native Method)
- waiting on <57d7e64f> (a com.mchange.v2.resourcepool.BasicResourcePool)
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1418)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:756)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:683)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:1108)
at org.springframework.jdbc.core.JdbcTemplate.call(JdbcTemplate.java:1173)
at org.springframework.jdbc.core.simple.AbstractJdbcCall.executeCallInternal(AbstractJdbcCall.java:381)
at org.springframework.jdbc.core.simple.AbstractJdbcCall.doExecute(AbstractJdbcCall.java:342)
at org.springframework.jdbc.core.simple.SimpleJdbcCall.execute(SimpleJdbcCall.java:190)
at org.springframework.integration.jdbc.StoredProcExecutor.executeStoredProcedureInternal(StoredProcExecutor.java:328)
at org.springframework.integration.jdbc.StoredProcExecutor.executeStoredProcedure(StoredProcExecutor.java:297)
at org.springframework.integration.jdbc.StoredProcOutboundGateway.handleRequestMessage(StoredProcOutboundGateway.java:60)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler$AdvisedRequestHandler.handleRequestMessage(AbstractReplyProducingMessageHandler.java:313)
at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.integration.handler.advice.AbstractRequestHandlerAdvice$1.cloneAndExecute(AbstractRequestHandlerAdvice.java:92)
at org.springframework.integration.handler.advice.RequestHandlerRetryAdvice$2.doWithRetry(RequestHandlerRetryAdvice.java:88)
at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:263)
at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:193)
at org.springframework.integration.handler.advice.RequestHandlerRetryAdvice.doInvoke(RequestHandlerRetryAdvice.java:85)
at org.springframework.integration.handler.advice.AbstractRequestHandlerAdvice.invoke(AbstractRequestHandlerAdvice.java:69)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at sun.proxy.$Proxy14.handleRequestMessage(Unknown Source)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.doInvokeAdvisedRequestHandler(AbstractReplyProducingMessageHandler.java:189)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:173)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
at org.springframework.integration.dispatcher.BroadcastingDispatcher.invokeHandler(BroadcastingDispatcher.java:160)
at org.springframework.integration.dispatcher.BroadcastingDispatcher.dispatch(BroadcastingDispatcher.java:142)
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:255)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:223)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:109)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:44)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:94)
at org.springframework.integration.endpoint.SourcePollingChannelAdapter.handleMessage(SourcePollingChannelAdapter.java:110)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:219)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.access$000(AbstractPollingEndpoint.java:55)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:149)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:146)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:298)
at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:52)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
锁定可拥有的同步器： - locked（java.util.concurrent.ThreadPoolExecutor $ Worker）