My tomcat based REST API application is not able to process request due to above mentioned error. I have tried following things so far :
1. checking if all the jar files are available or not 2. Checking permissions on all files present in tomcat/webapp/ directory 3. firewall rules 4. Hbase is availabe or not but then also getting following exception. I am using CDH 5.3.1 which contains HBase 0.98.6. Does anyone know how to resolve this issue? 2015-03-03 05:09:02 privateLog [ERROR] java.lang.reflect.InvocationTargetException org.apache.hadoop.hbase.client.HConnectionManager.createConnection(HConnectionManager.java:413) org.apache.hadoop.hbase.client.HConnectionManager.createConnection(HConnectionManager.java:306) com.amazon.dao.MyDAO.<clinit>(SensorDataDAO.java:78) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) java.lang.reflect.Constructor.newInstance(Constructor.java:526) org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126) org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:74) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:958) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276) org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197) org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779) org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273) org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871) org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:958) org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1599) java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) java.util.concurrent.FutureTask.run(FutureTask.java:166) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) java.lang.Thread.run(Thread.java:724) com.amazon.dao.MyDAO <clinit> Code which tries to establish connection is as follows: public class MyDAO { protected static HConnection connection; static { Configuration conf = HBaseConfiguration.create(); conf.addResource("hbase-site.xml"); connection = HConnectionManager.createConnection(conf); // connection object is still null at this point try { } catch (Exception ex) { ex.printStackTrace(); } } } Regards, Chandrash3khar Kotekar Mobile - +91 8600011455