Sifting through the log from this morning I found nothing of note before I tried to restart Tomcat, but I found these from after I restarted TOMCAT7
SEVERE: IOException while loading persisted sessions: java.io.StreamCorruptedException: unexpected EOF in middle of data block
java.io.StreamCorruptedException: unexpected EOF in middle of data block
at java.io.ObjectInputStream$BlockDataInputStream.refill(ObjectInputStream.java:2539)
at java.io.ObjectInputStream$BlockDataInputStream.read(ObjectInputStream.java:2615)
at java.io.DataInputStream.readInt(DataInputStream.java:387)
at java.io.ObjectInputStream$BlockDataInputStream.readInt(ObjectInputStream.java:2820)
at java.io.ObjectInputStream.readInt(ObjectInputStream.java:971)
at java.util.HashMap.readObject(HashMap.java:1154)
at sun.reflect.GeneratedMethodAccessor504.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1595)
at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1060)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:282)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:202)
at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:489)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5476)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Exception in thread "Thread-212" org.openmrs.api.APIException: contextDAO is null
at org.openmrs.api.context.Context.getContextDAO(Context.java:173)
at org.openmrs.api.context.Context.closeSession(Context.java:737)
at org.openmrs.api.context.Daemon$4.run(Daemon.java:215)
Apr 15, 2015 9:33:32 AM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/openmrs] appears to have started a thread named [Thread-2] but has failed to stop it. This is very likely to create a memory leak.
Apr 15, 2015 9:33:32 AM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/openmrs] created a ThreadLocal with key of type [org.springframework.core.NamedThreadLocal] (value [Transactional resources]) and a value of type [java.util.HashMap] (value [{org.hibernate.impl.SessionFactoryImpl@271e65fe=org.springframework.orm.hibernate3.SessionHolder@1594c6f6}]) 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.