17-May-2018 12:39:49.413 경고 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Caesium-1-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:sun.misc.Unsafe.park(Native Method)java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.takeUnderLock(SchedulerQueueImpl.java:292)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.take(SchedulerQueueImpl.java:246)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:53)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)java.lang.Thread.run(Thread.java:748)17-May-2018 12:39:49.414 경고 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Caesium-1-2] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:sun.misc.Unsafe.park(Native Method)java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.takeUnderLock(SchedulerQueueImpl.java:292)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.take(SchedulerQueueImpl.java:246)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:53)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)java.lang.Thread.run(Thread.java:748)17-May-2018 12:39:49.416 경고 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Caesium-1-3] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:sun.misc.Unsafe.park(Native Method)java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.takeUnderLock(SchedulerQueueImpl.java:292)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.take(SchedulerQueueImpl.java:246)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:53)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)java.lang.Thread.run(Thread.java:748)17-May-2018 12:39:49.417 경고 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Caesium-1-4] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:sun.misc.Unsafe.park(Native Method)java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.takeUnderLock(SchedulerQueueImpl.java:292)com.atlassian.scheduler.caesium.impl.SchedulerQueueImpl.take(SchedulerQueueImpl.java:246)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:53)com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)java.lang.Thread.run(Thread.java:748)17-May-2018 12:39:49.417 심각 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [com.opensymphony.xwork.ActionContext.ActionContextThreadLocal] (value [com.opensymphony.xwork.ActionContext$ActionContextThreadLocal@4ee81adf]) and a value of type [com.opensymphony.xwork.ActionContext] (value [com.opensymphony.xwork.ActionContext@44f1dd9f]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.17-May-2018 12:39:49.417 심각 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [com.opensymphony.xwork.ActionContext.ActionContextThreadLocal] (value [com.opensymphony.xwork.ActionContext$ActionContextThreadLocal@4ee81adf]) and a value of type [com.opensymphony.xwork.ActionContext] (value [com.opensymphony.xwork.ActionContext@15d91674]) 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.17-May-2018 12:39:49.417 심각 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [com.opensymphony.xwork.ActionContext.ActionContextThreadLocal] (value [com.opensymphony.xwork.ActionContext$ActionContextThreadLocal@4ee81adf]) and a value of type [com.opensymphony.xwork.ActionContext] (value [com.opensymphony.xwork.ActionContext@50ff441b]) 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.17-May-2018 12:39:49.417 심각 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [org.apache.shindig.common.xml.XmlUtil$2] (value [org.apache.shindig.common.xml.XmlUtil$2@ac72b32]) and a value of type [org.apache.xerces.jaxp.DocumentBuilderImpl] (value [org.apache.xerces.jaxp.DocumentBuilderImpl@401012d0]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.17-May-2018 12:39:49.418 심각 [localhost-startStop-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [com.opensymphony.xwork.ActionContext.ActionContextThreadLocal] (value [com.opensymphony.xwork.ActionContext$ActionContextThreadLocal@4ee81adf]) and a value of type [com.opensymphony.xwork.ActionContext] (value [com.opensymphony.xwork.ActionContext@1da7d610]) 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.17-May-2018 12:39:49.435 정보 [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8090"]17-May-2018 12:39:49.523 정보 [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8090"]
Those are errors that occur during the shutdown. You will need to look earlier up that file to see why it's not starting properly.
Read atlassian-confluence.log and catalina.out for the times around starting it. One of those will tell you why it's not able to start.
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