Cloudera scm server start failed

[#1]

when I run the command service cloudera-scm-server start

Shows failed 

Urgent help needed  as I have stuck with issue since last 2 days

org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)

        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)

        at com.cloudera.server.cmf.Main.bootstrapSpringContext(Main.java:392)

        at com.cloudera.server.cmf.Main.<init>(Main.java:242)

        at com.cloudera.server.cmf.Main.main(Main.java:216)

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactoryBean': FactoryBean threw exception on object creation; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: cmf.server] Unable to build EntityManagerFactory

        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)

        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1440)

        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:247)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)

        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)

        ... 17 more

Caused by: javax.persistence.PersistenceException: [PersistenceUnit: cmf.server] Unable to build EntityManagerFactory

        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:924)

        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:899)

        at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:59)

        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)

        at com.cloudera.enterprise.CommonMain.setupHibernate(CommonMain.java:183)

        at com.cloudera.server.cmf.bootstrap.EntityManagerFactoryBean.getObject(EntityManagerFactoryBean.java:114)

        at com.cloudera.server.cmf.bootstrap.EntityManagerFactoryBean.getObject(EntityManagerFactoryBean.java:65)

        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)

        ... 22 more

tail -n50 /var/log/cloudera-scm-server/cloudera-scm-server.out

        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)

        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)

        at com.cloudera.server.cmf.Main.bootstrapSpringContext(Main.java:392)

        at com.cloudera.server.cmf.Main.<init>(Main.java:242)

        at com.cloudera.server.cmf.Main.main(Main.java:216)

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactoryBean': FactoryBean threw exception on object creation; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: cmf.server] Unable to build EntityManagerFactory

        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)

        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1440)

        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:247)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)

        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)

        ... 17 more

Caused by: javax.persistence.PersistenceException: [PersistenceUnit: cmf.server] Unable to build EntityManagerFactory

        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:924)

        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:899)

        at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:59)

        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)

        at com.cloudera.enterprise.CommonMain.setupHibernate(CommonMain.java:183)

        at com.cloudera.server.cmf.bootstrap.EntityManagerFactoryBean.getObject(EntityManagerFactoryBean.java:114)

        at com.cloudera.server.cmf.bootstrap.EntityManagerFactoryBean.getObject(EntityManagerFactoryBean.java:65)

        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)

        ... 22 more

Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: HHH010003: JDBC Driver class not found: com.mysql.jdbc.Driver

        at org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider.configure(C3P0ConnectionProvider.java:142)

        at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)

        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)

        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)

        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:223)

        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:89)

        at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)

        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)

        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)

        at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1797)

        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1755)

        at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:96)

        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914)

        ... 29 more

Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [com.mysql.jdbc.Driver]

        at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:149)

        at org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider.configure(C3P0ConnectionProvider.java:139)

        ... 41 more

Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mysql.jdbc.Driver

        at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader.findClass(ClassLoaderServiceImpl.java:296)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

        at java.lang.Class.forName0(Native Method)

        at java.lang.Class.forName(Class.java:348)

        at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:146)

        ... 42 more

[#2]

Hello,

According to the error information it appears as though you are attempting to use mySQL as a database backend. The stack trace reports the the mySQL JDBC driver cannot be located or loaded.

HHH010003: JDBC Driver class not found: com.mysql.jdbc.Driver
...
Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mysql.jdbc.Driver

Please review the following documentation.

https://www.cloudera.com/documentation/enterprise/6/6.1/topics/cm_ig_mysql.html#cmig_topic_5_5_3

[#3 · Accepted solution]

Hello Ihebert,

I found the solution I forgot to give permissions to Mysql java connector jar file