MATLAB reports error once it runs:Exception in thread "CFB Source Control Executor": java.lang.​NoClassDef​FoundError​: org/apache​/log4j/App​ender

Exception in thread "CFB Source Control Executor": java.lang.NoClassDefFoundError: org/apache/log4j/Appender
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at com.mathworks.util.ImplementorsCacheImpl.getService(ImplementorsCacheImpl.java:142)
	at com.mathworks.util.ImplementorsCacheImpl.getServicesForImplementors(ImplementorsCacheImpl.java:126)
	at com.mathworks.util.ImplementorsCacheImpl.getImplementors(ImplementorsCacheImpl.java:61)
	at com.mathworks.cmlink.management.registration.OsgiCMAdapterFactoryList.lookUpFactories(OsgiCMAdapterFactoryList.java:35)
	at com.mathworks.cmlink.management.registration.OsgiCMAdapterFactoryList.<init>(OsgiCMAdapterFactoryList.java:27)
	at com.mathworks.cmlink.management.registration.OsgiCMAdapterFactoryList.<clinit>(OsgiCMAdapterFactoryList.java:17)
	at com.mathworks.cmlink.management.registration.SingletonCMAdapterFactoryList.getCMAdapterFactoryLists(SingletonCMAdapterFactoryList.java:32)
	at com.mathworks.cmlink.management.registration.SingletonCMAdapterFactoryList.<clinit>(SingletonCMAdapterFactoryList.java:14)
	at com.mathworks.cmlink.management.pool.adapter.PrefBackedAdapterFactoryProvider.provide(PrefBackedAdapterFactoryProvider.java:29)
	at com.mathworks.cmlink.util.adapter.CMAdapterFactoryProviderDecorator.provide(CMAdapterFactoryProviderDecorator.java:19)
	at com.mathworks.cmlink.util.adapter.transformer.TransformableCMAdapterFactoryProvider.provide(TransformableCMAdapterFactoryProvider.java:24)
	at com.mathworks.cmlink.util.adapter.CMAdapterFactoryProviderDecorator.provide(CMAdapterFactoryProviderDecorator.java:19)
	at com.mathworks.cmlink.util.adapter.transformer.TransformableCMAdapterFactoryProvider.provide(TransformableCMAdapterFactoryProvider.java:24)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheEntry.<init>(PooledCmStatusCacheEntry.java:77)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider$1.<init>(PooledCmStatusCacheProvider.java:101)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider.provideEntryFor(PooledCmStatusCacheProvider.java:98)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider.provideCacheUnsafe(PooledCmStatusCacheProvider.java:55)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider.provideCacheFor(PooledCmStatusCacheProvider.java:47)
	at com.mathworks.cmlink.management.cache.RootSearchingCmStatusCacheFactory.provideCacheFor(RootSearchingCmStatusCacheFactory.java:38)
	at com.mathworks.sourcecontrol.SCAdapterConnectionManager.updateCache(SCAdapterConnectionManager.java:174)
	at com.mathworks.sourcecontrol.SCAdapterConnectionManager.access$500(SCAdapterConnectionManager.java:29)
	at com.mathworks.sourcecontrol.SCAdapterConnectionManager$2.run(SCAdapterConnectionManager.java:78)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Appender
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 27 more
Exception in thread "CFB Source Control Executor": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.cmlink.management.registration.SingletonCMAdapterFactoryList
	at com.mathworks.cmlink.management.pool.adapter.PrefBackedAdapterFactoryProvider.provide(PrefBackedAdapterFactoryProvider.java:29)
	at com.mathworks.cmlink.util.adapter.CMAdapterFactoryProviderDecorator.provide(CMAdapterFactoryProviderDecorator.java:19)
	at com.mathworks.cmlink.util.adapter.transformer.TransformableCMAdapterFactoryProvider.provide(TransformableCMAdapterFactoryProvider.java:24)
	at com.mathworks.cmlink.util.adapter.CMAdapterFactoryProviderDecorator.provide(CMAdapterFactoryProviderDecorator.java:19)
	at com.mathworks.cmlink.util.adapter.transformer.TransformableCMAdapterFactoryProvider.provide(TransformableCMAdapterFactoryProvider.java:24)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheEntry.<init>(PooledCmStatusCacheEntry.java:77)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider$1.<init>(PooledCmStatusCacheProvider.java:101)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider.provideEntryFor(PooledCmStatusCacheProvider.java:98)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider.provideCacheUnsafe(PooledCmStatusCacheProvider.java:55)
	at com.mathworks.cmlink.management.pool.PooledCmStatusCacheProvider.provideCacheFor(PooledCmStatusCacheProvider.java:47)
	at com.mathworks.cmlink.management.cache.RootSearchingCmStatusCacheFactory.provideCacheFor(RootSearchingCmStatusCacheFactory.java:38)
	at com.mathworks.sourcecontrol.SCAdapterConnectionManager.updateCache(SCAdapterConnectionManager.java:174)
	at com.mathworks.sourcecontrol.SCAdapterConnectionManager.access$500(SCAdapterConnectionManager.java:29)
	at com.mathworks.sourcecontrol.SCAdapterConnectionManager$2.run(SCAdapterConnectionManager.java:78)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

[vidhathri bhat]

Hi

It seems like org.apache.log4j.Appender class is not there in the classpath. Check this link and see if this helps.

http://www.java67.com/2015/08/caused-by-javalangnoclassdeffounderror-org-apache-log4j-Logger.html