cgl.imr.base.TwisterException: Could not instantiate the Mapper. at cgl.imr.worker.Mapper.<init (Mapper.java:120) at cgl.imr.worker.DaemonWorker.handleMapperRequest(DaemonWorker.java:228)

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    via netty.io by Unknown author

    Needs to add netty-transport-native-epoll with a OS classifier to the classpath, it's not included in netty-all

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Could not instantiate the Mapper. at cgl.imr.worker.Mapper.<init (Mapper.java:120) at cgl.imr.worker.DaemonWorker.handleMapperRequest(DaemonWorker.java:228)
cgl.imr.base.TwisterException: Could notinstantiate the Mapper.     atcgl.imr.worker.Mapper.<init   (Mapper.java:120)     atcgl.imr.worker.DaemonWorker.handleMapperRequest(DaemonWorker.java:228)	at cgl.imr.worker.DaemonWorker.onEvent(DaemonWorker.java:471)	at cgl.imr.pubsub.nb.NBPubSubService.onEvent(NBPubSubService.java:154)	at cgl.narada.service.qos.impl.QosServiceImpl.routeToEventConsumer(QosServiceImpl.java:938)	at cgl.narada.service.qos.impl.QosServiceImpl.manageEventRoutingToDestinations(QosServiceImpl.java:530)	at cgl.narada.service.qos.impl.QosServiceImpl.processReceivedEvent(QosServiceImpl.java:424)	at cgl.narada.service.qos.impl.CommunicationsService.processDataPackets(CommunicationsService.java:236)	at cgl.narada.service.qos.impl.CommunicationsService.processData(CommunicationsService.java:214)	at cgl.narada.service.qos.impl.CommunicationsService.handleData(CommunicationsService.java:142)	at cgl.narada.transport.TransportHandlerImpl.dataReceived(TransportHandlerImpl.java:516)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:323)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.processBuffer(NIOTCPReceiverThread.java:329)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.readDataFromSocket(NIOTCPReceiverThread.java:247)	at cgl.narada.transport.niotcp.NIOTCPReceiverThread.run(NIOTCPReceiverThread.java:196)Caused by: java.lang.ClassNotFoundException: map_reduce.GPMapTask   	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)	at java.lang.ClassLoader.findSystemClass(ClassLoader.java:1004)	at cgl.imr.util.CustomClassLoader.findClass(CustomClassLoader.java:102)	at cgl.imr.util.CustomClassLoader.loadClass(CustomClassLoader.java:129)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:348)