今天遇到一个问题，要在一个tomcat中部署多个war文件，在此之前对tomcat的了解就是，默认配置下，在webapp文件夹下新建的文件夹即可通过ip+端口+文件夹名 被访问到，所以多个war包直接扔里就应该是没问题，但是：
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:754)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:985)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
at java.util.concurrent.Executors$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$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userTransactionService' defined in class path resource [org/springframework/boot/autoconfigure/transaction/jta/AtomikosJtaConfiguration.class]: Invocation of init method failed; nested exception is com.atomikos.icatch.SysException: Error in init: Log already in use? tmlog in D:\A_long\apache-tomcat-8.5.34\bin\transaction-logs\
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:151)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:131)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:91)
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:171)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5245)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 10 more
Caused by: com.atomikos.icatch.SysException: Error in init: Log already in use? tmlog in D:\A_long\apache-tomcat-8.5.34\bin\transaction-logs\
at com.atomikos.icatch.provider.imp.AssemblerImp.createRepository(AssemblerImp.java:181)
at com.atomikos.icatch.provider.imp.AssemblerImp.assembleTransactionService(AssemblerImp.java:156)
at com.atomikos.icatch.config.Configuration.assembleSystemComponents(Configuration.java:485)
at com.atomikos.icatch.config.Configuration.init(Configuration.java:448)
at com.atomikos.icatch.config.UserTransactionServiceImp.initialize(UserTransactionServiceImp.java:105)
at com.atomikos.icatch.config.UserTransactionServiceImp.init(UserTransactionServiceImp.java:219)
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.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1904)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1846)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774)
... 29 more
Caused by: com.atomikos.recovery.LogException: Log already in use? tmlog in D:\A_long\apache-tomcat-8.5.34\bin\transaction-logs\
at com.atomikos.persistence.imp.LogFileLock.acquireLock(LogFileLock.java:59)
at com.atomikos.recovery.imp.FileSystemRepository.init(FileSystemRepository.java:55)
at com.atomikos.icatch.provider.imp.AssemblerImp.createCoordinatorLogEntryRepository(AssemblerImp.java:229)
at com.atomikos.icatch.provider.imp.AssemblerImp.createRepository(AssemblerImp.java:179)
... 41 more
16-Jul-2020 21:16:00.169 严重 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Error deploying web application archive [D:\A_long\apache-tomcat-8.5.34\webapps\XHPiano_2020.war]
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/XHPiano_2020]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:758)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:985)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
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)，
经过查询才知道，如果多个springboot项目，都通过atomikos配置了多数据源，在同一服务器主机上启动运行，就会报错：
com.atomikos.recovery.LogException: Log already in use?
出错原因：atomikos默认日志打印：tomcat\transaction-logs\tmlog.lck 和 tomcat\transaction-logs\tmlog0.log，导致多项目共用同一日志文件，前面的项目将会锁定文件，后面启动的项目将会无法写入。所以解决方案就有了，既然是公用同一个日志文件导致的，那就自己用自己的不就好了，修改文件名称或路径，或者干脆不用日志，于是乎，解决方案就是：
1.在配置文件中修改日志文件名称，一个项目一个不重复，spring.jta.atomikos.properties.log-base-name=name1（name2，name3.。。）
2.在配置文件中修改日志文件路径，一个项目一个不重复，spring.jta.atomikos.properties.log-base-dir=./log/name1（./log/name2,name3..）
3.在配置文件中关闭日志打印（可以开一个），spring.jta.atomikos.properties.enable-logging=false
以上参考的是：https://blog.csdn.net/wtl1992/article/details/90766815