spring - 当停止在tomcat上运行的spring应用程序时，它会抛出一些警告

Question

我正在开发一个 spring 批处理应用程序，它使用 comboPooledDataSource 连接到数据库。并且应用程序在tomcat9 上运行。当我停止 pod(container) 以部署另一个版本的应用程序时，日志显示应用程序已停止，但在销毁容器之前它会引发一些警告。

19-Aug-2020 09:58:16.235 WARNING [Thread-13] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 java.util.TimerThread.mainLoop(Timer.java:552)
 java.util.TimerThread.run(Timer.java:505)
19-Aug-2020 09:58:16.235 WARNING [Thread-13] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [] appears to have started a thread named [C3P0PooledConnectionPoolManager[]-DeferredStatementDestroyerThread-#0] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:683)
19-Aug-2020 09:58:16.236 WARNING [Thread-13] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [] appears to have started a thread named [oracle.jdbc.driver.BlockSource.ThreadedCachingBlockSource.BlockReleaser] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 oracle.jdbc.driver.BlockSource$ThreadedCachingBlockSource$BlockReleaser.run(BlockSource.java:327)
19-Aug-2020 09:58:16.236 WARNING [Thread-13] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [] appears to have started a thread named [Resource Destroyer in BasicResourcePool.close()] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.net.SocketInputStream.socketRead0(Native Method)
 java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
 java.net.SocketInputStream.read(SocketInputStream.java:171)
 java.net.SocketInputStream.read(SocketInputStream.java:141)
 oracle.net.ns.Packet.receive(Packet.java:311)
 oracle.net.ns.DataPacket.receive(DataPacket.java:105)
 oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:305)
 oracle.net.ns.NetInputStream.read(NetInputStream.java:249)
 oracle.net.ns.NetInputStream.read(NetInputStream.java:171)
 oracle.net.ns.NetInputStream.read(NetInputStream.java:89)
 oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:123)
 oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:79)
 oracle.jdbc.driver.T4CMAREngineStream.unmarshalUB1(T4CMAREngineStream.java:429)
 oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:397)
 oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257)
 oracle.jdbc.driver.T4C7Ocommoncall.doOLOGOFF(T4C7Ocommoncall.java:59)
 oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:844)
 oracle.jdbc.driver.PhysicalConnection.close(PhysicalConnection.java:2498)
 com.mchange.v2.c3p0.impl.NewPooledConnection.close(NewPooledConnection.java:642)
 com.mchange.v2.c3p0.impl.NewPooledConnection.closeMaybeCheckedOut(NewPooledConnection.java:255)
 com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.destroyResource(C3P0PooledConnectionPool.java:622)
 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:1076)
 com.mchange.v2.resourcepool.BasicResourcePool.destroyResource(BasicResourcePool.java:1101)
 com.mchange.v2.resourcepool.BasicResourcePool.destroyResource(BasicResourcePool.java:1062)
 com.mchange.v2.resourcepool.BasicResourcePool.access$100(BasicResourcePool.java:44)
 com.mchange.v2.resourcepool.BasicResourcePool$5.run(BasicResourcePool.java:1316)
19-Aug-2020 09:58:16.239 SEVERE [Thread-13] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@19931e16]) and a value of type [org.apache.logging.log4j.core.LoggerContext] (value [org.apache.logging.log4j.core.LoggerContext@205f573e]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.

我检查了其他相关问题，上面写着 ** 这些只是警告，tomcat 已强制删除或停止它。** 但我想在我的应用程序中进行更改。因此，从应用程序设计的角度来看，不会显示其他警告。

谁能有任何想法，在应用程序中检查什么以及如何解决它。

标签： springtomcat