Explanation of start failure "java.lang.NoClassDefFoundError: org/neo4j/kernel/impl/logging/LogService"
Upon starting Neo4j 3.5 if one encounters the following error in the logs/neo4j.log
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.extension.GlobalKernelExtensions@14c16d' failed to initialize. Please see the attached cause exception "org.neo4j.kernel.impl.logging.LogService". at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:434) at org.neo4j.kernel.lifecycle.LifeSupport.init(LifeSupport.java:66) at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:102) at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:203) ... 9 more Caused by: java.lang.NoClassDefFoundError: org/neo4j/kernel/impl/logging/LogService at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetPublicMethods(Class.java:2902) at java.lang.Class.getMethods(Class.java:1615) at sun.misc.ProxyGenerator.generateClassFile(ProxyGenerator.java:451) at sun.misc.ProxyGenerator.generateProxyClass(ProxyGenerator.java:339) at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:639) at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:557) at java.lang.reflect.WeakCache$Factory.get(WeakCache.java:230) at java.lang.reflect.WeakCache.get(WeakCache.java:127) at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:419) at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:719) at org.neo4j.kernel.impl.util.DependenciesProxy.dependencies(DependenciesProxy.java:55) at org.neo4j.kernel.extension.AbstractKernelExtensions.getKernelExtensionDependencies(AbstractKernelExtensions.java:111) at org.neo4j.kernel.extension.AbstractKernelExtensions.init(AbstractKernelExtensions.java:59) at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:413) ... 12 more Caused by: java.lang.ClassNotFoundException: org.neo4j.kernel.impl.logging.LogService at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 28 more
this is usually indicative of a incompatible APOC jar file installed into $NEO4J_HOME/plugins
.
With Neo4j 3.5.0 the correct APOC jar to use so as to avoid this error is:
$ ls -al apoc*
-rw-rw-r-- 1 neo4j neo4j 12880869 Nov 30 11:49 apoc-3.5.0.1-all.jar
This jar is available at here
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