Confluence not start up
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17-May-2018 12:39:49.413 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[localhost-startStop-3\] 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 ?? \[main\] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler \["http-nio-8090"\]  
17-May-2018 12:39:49.523 ?? \[main\] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler \["http-nio-8090"\]


Answers:
author: Nic Brough -Adaptavist-
body: 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.