Tomcat7で発生するLifecycleExceptionエラーの対策方法について

既存のソースコードを配置するRedHatサーバーをバージョンアップしています。ソースをJDK1.6環境にてビルドしたものを、JDK1.8、tomcat7サーバにデプロイしました。
tomcatの停止、起動時にCatalina.outログに下記のエラーが発生しております。
原因・対策方法についてわかることがございましたらご教示いただけると幸いです。


【停止時】
***
警告: Failed to retrieve JNDI naming context for container [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/pfroject-name]] so no cleanup was performed for that container
javax.naming.NamingException: 名前付けコンテキストはこのクラスローダにバインドされていません
        at org.apache.naming.ContextBindings.getClassLoader(ContextBindings.java:350)
        at org.apache.catalina.deploy.NamingResources.cleanUp(NamingResources.java:985)
        at org.apache.catalina.deploy.NamingResources.stopInternal(NamingResources.java:968)
        at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:221)
        at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5846)
        at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:221)
        at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:259)
        at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:1030)
        at org.apache.catalina.core.ContainerBase.destroyInternal(ContainerBase.java:1230)
        at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
        at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:1030)
        at org.apache.catalina.core.ContainerBase.destroyInternal(ContainerBase.java:1230)
        at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
        at org.apache.catalina.core.StandardService.destroyInternal(StandardService.java:594)
        at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
        at org.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:848)
        at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:292)
        at org.apache.catalina.startup.Catalina.stop(Catalina.java:767)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:728)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)

6 29, 2017 3:56:03 午後 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host} Setting property 'xmlValidation' to 'false' did not find a matching property.
6 29, 2017 3:56:03 午後 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host} Setting property 'xmlNamespaceAware' to 'false' did not find a matching property.
***


【起動時】
***
重大: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/pfroject-name]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1092)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1984)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
        at org.apache.commons.dbcp.BasicDataSourceFactory.createDataSource(BasicDataSourceFactory.java:152)
        at org.apache.commons.dbcp.BasicDataSourceFactory.getObjectInstance(BasicDataSourceFactory.java:144)
        at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:141)
        at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:848)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:173)
        at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1110)
        at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:689)
        at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:273)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5522)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
        ... 10 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool.impl.GenericObjectPool
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        ... 23 more

6 29, 2017 3:56:05 午後 org.apache.catalina.startup.HostConfig deployWAR
重大: Webアプリケーションアーカイブ /var/lib/tomcat/webapps/pfroject-name.war を配備中のエラーです
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/pfroject-name]]
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:903)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1092)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1984)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
***

以上、よろしくお願い申し上げます。