Unable to start Alfresco

[eapeterson]

Trying to install default (32 bit)Community Edition onto Windows 2008 Server Standard
There was a prior Tomcat installation, but I installed into custom ports
My system Java version is (1.6.0_12) in c:\Program Files\Java\jre6,
but setenv.bat points to the following:
   JAVA_HOME=E:\alfresco\java
   JRE_HOME =E:\alfresco\java\jre
(and I also set Environment Variable with the same values)
I am unable to start the system, and I don't know what to try next.


I can see errors in the log files:
(snip from localhost.log)
May 16, 2014 10:08:25 AM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter Alfresco Web Editor Filter
java.lang.UnsupportedClassVersionError: org/alfresco/web/awe/filter/WebEditorFilter : Unsupported major.minor version 51.0 (unable to load class org.alfresco.web.awe.filter.WebEditorFilter)
   at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2948)
   at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
   at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
   at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
   at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:529)
   at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:511)
   at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:139)
   at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)
   at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
   at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4809)
   at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5485)
   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(Unknown Source)
   at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
   at java.util.concurrent.FutureTask.run(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
May 16, 2014 10:08:25 AM org.apache.catalina.core.ApplicationContext log
INFO: org.tuckey.web.filters.urlrewrite.UrlRewriteFilter INFO: loaded (conf ok)
May 16, 2014 10:08:25 AM org.apache.catalina.core.ApplicationContext log
INFO: org.tuckey.web.filters.urlrewrite.UrlRewriteFilter INFO: destroy called


(snip from alfrescotomcat-stderr.log)
May 16, 2014 10:08:12 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class org.alfresco.repo.webdav.WebDAVSessionListener
java.lang.UnsupportedClassVersionError: org/alfresco/repo/webdav/WebDAVSessionListener : Unsupported major.minor version 51.0 (unable to load class org.alfresco.repo.webdav.WebDAVSessionListener)
   at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2948)
   at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
   at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
   at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
   at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:529)
   at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:511)
   at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:139)
   at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4888)
   at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
   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(Unknown Source)
   at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
   at java.util.concurrent.FutureTask.run(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
May 16, 2014 10:08:12 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)

(snip from catalina.log)
May 16, 2014 10:07:50 AM org.apache.tomcat.websocket.server.WsSci onStartup
INFO: JSR 356 WebSocket (Java WebSocket 1.0) support is not available when running on Java 6. To suppress this message, run Tomcat on Java 7, remove the WebSocket JARs from $CATALINA_HOME/lib or add the WebSocketJARs to the tomcat.util.scan.DefaultJarScanner.jarsToSkip property in $CATALINA_BASE/conf/catalina.properties. Note that the deprecated Tomcat 7 WebSocket API will be available.
May 16, 2014 10:07:50 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive E:\Alfresco\tomcat\webapps\alfresco.war
May 16, 2014 10:08:12 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
May 16, 2014 10:08:12 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/alfresco] startup failed due to previous errors

[mlagneaux]

Hello,

It seems like you're running Alfresco with Java 6 and Alfresco 4.2 only works with Java 7.
In logs, you can read the following message:

INFO: JSR 356 WebSocket (Java WebSocket 1.0) support is not available when running on Java 6. To suppress this message, run Tomcat on Java 7, remove the WebSocket JARs from $CATALINA_HOME/lib or add the WebSocketJARs to the tomcat.util.scan.DefaultJarScanner.jarsToSkip property in $CATALINA_BASE/conf/catalina.properties. Note that the deprecated Tomcat 7 WebSocket API will be available. 
‍‍‍

Did you install Alfresco thanks to the installer?