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Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2018/04/25 05:51:08 UTC

[GitHub] ajanthan opened a new issue #1115: Build Failure

ajanthan opened a new issue #1115: Build Failure
URL: https://github.com/apache/incubator-skywalking/issues/1115
 
 
   Please answer these questions before submitting your issue.
   
   - Why do you submit this issue?
   - [* ] Question or discussion
   - [ ] Bug
   - [ ] Requirement
   - [ ] Feature or performance improvement
   
   ___
   ### Question
   - What do you want to know?
   I am getting following error while building master branch(mvn clean install -Dmaven.test.skip=true on root directory). How can I fix it?
   
   [INFO]
   [INFO] --- jacoco-maven-plugin:0.7.9:prepare-agent (prepare-agent) @ apm-agent-core ---
   [INFO] argLine set to -javaagent:/Users/ajanthan/.m2/repository/org/jacoco/org.jacoco.agent/0.7.9/org.jacoco.agent-0.7.9-runtime.jar=destfile=/Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/target/jacoco.exec,excludes=*MethodAccess
   [INFO]
   [INFO] --- maven-remote-resources-plugin:1.5:process (process-resource-bundles) @ apm-agent-core ---
   [INFO]
   [INFO] --- maven-resources-plugin:2.4.3:resources (default-resources) @ apm-agent-core ---
   [INFO] Using 'UTF-8' encoding to copy filtered resources.
   [INFO] Copying 1 resource
   [INFO] Copying 3 resources
   [INFO]
   [INFO] --- maven-compiler-plugin:3.6.1:compile (default-compile) @ apm-agent-core ---
   [INFO] Changes detected - recompiling the module!
   [INFO] Compiling 151 source files to /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/target/classes
   [INFO] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/match/HierarchyMatch.java: Some input files use unchecked or unsafe operations.
   [INFO] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/match/HierarchyMatch.java: Recompile with -Xlint:unchecked for details.
   [INFO] -------------------------------------------------------------
   [ERROR] COMPILATION ERROR :
   [INFO] -------------------------------------------------------------
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/ID.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[122,12] cannot find symbol
     symbol:   class TraceSegmentReference
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/ID.java:[99,12] cannot find symbol
     symbol:   class UniqueId
     location: class org.apache.skywalking.apm.agent.core.context.ids.ID
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/DistributedTraceId.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/DistributedTraceId.java:[57,12] cannot find symbol
     symbol:   class UniqueId
     location: class org.apache.skywalking.apm.agent.core.context.ids.DistributedTraceId
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[30,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[31,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[161,12] cannot find symbol
     symbol:   class UpstreamSegment
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegment
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[248,22] package SpanObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[46,12] cannot find symbol
     symbol:   class KeyWithStringValue
     location: class org.apache.skywalking.apm.agent.core.context.util.KeyValuePair
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[65,12] cannot find symbol
     symbol:   class LogMessage
     location: class org.apache.skywalking.apm.agent.core.context.trace.LogDataEntity
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUProvider.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUProvider.java:[47,12] cannot find symbol
     symbol:   class CPU
     location: class org.apache.skywalking.apm.agent.core.jvm.cpu.CPUProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[43,12] cannot find symbol
     symbol:   class CPU
     location: class org.apache.skywalking.apm.agent.core.jvm.cpu.CPUMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[26,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolMetricAccessor.java:[23,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[40,17] cannot find symbol
     symbol:   class MemoryPool
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolMetricAccessor.java:[29,10] cannot find symbol
     symbol:   class MemoryPool
     location: interface org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCProvider.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCMetricAccessor.java:[23,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCProvider.java:[52,17] cannot find symbol
     symbol:   class GC
     location: class org.apache.skywalking.apm.agent.core.jvm.gc.GCProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCMetricAccessor.java:[29,10] cannot find symbol
     symbol:   class GC
     location: interface org.apache.skywalking.apm.agent.core.jvm.gc.GCMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCModule.java:[24,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCModule.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCModule.java:[41,17] cannot find symbol
     symbol:   class GC
     location: class org.apache.skywalking.apm.agent.core.jvm.gc.GCModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[26,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[29,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[30,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[70,40] package ServiceNameDiscoveryServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[150,9] cannot find symbol
     symbol:   class SpanType
     location: class org.apache.skywalking.apm.agent.core.dictionary.OperationNameDictionary.OperationNameKey
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/UnknowGC.java:[24,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/UnknowGC.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/UnknowGC.java:[32,17] cannot find symbol
     symbol:   class GC
     location: class org.apache.skywalking.apm.agent.core.jvm.gc.UnknowGC
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memory/MemoryProvider.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memory/MemoryProvider.java:[40,17] cannot find symbol
     symbol:   class Memory
     location: class org.apache.skywalking.apm.agent.core.jvm.memory.MemoryProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/os/OSUtil.java:[31,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/os/OSUtil.java:[98,19] cannot find symbol
     symbol:   class OSInfo
     location: class org.apache.skywalking.apm.agent.core.os.OSUtil
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[37,1] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[54,52] package ApplicationRegisterServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[55,50] package InstanceDiscoveryServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[56,53] package ServiceNameDiscoveryServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[57,55] package NetworkAddressRegisterServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[26,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[29,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[56,42] package NetworkAddressRegisterServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[35,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[36,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[37,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[57,45] package TraceSegmentServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolProvider.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolProvider.java:[51,17] cannot find symbol
     symbol:   class MemoryPool
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/UnknownMemoryPool.java:[24,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/UnknownMemoryPool.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/UnknownMemoryPool.java:[32,17] cannot find symbol
     symbol:   class MemoryPool
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.UnknownMemoryPool
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[38,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[39,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[40,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[59,33] cannot find symbol
     symbol:   class JVMMetric
     location: class org.apache.skywalking.apm.agent.core.jvm.JVMService
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[128,47] package JVMMetricsServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/ExitSpan.java:[23,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/ExitSpan.java:[121,32] package SpanObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[123,30] package TraceSegmentReference does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[123,52] cannot find symbol
     symbol:   variable TraceSegmentReference
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[125,35] cannot find symbol
     symbol:   variable RefType
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[133,35] cannot find symbol
     symbol:   variable RefType
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/ID.java:[100,16] cannot find symbol
     symbol:   variable UniqueId
     location: class org.apache.skywalking.apm.agent.core.context.ids.ID
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[162,24] package UpstreamSegment does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[162,51] cannot find symbol
     symbol:   variable UpstreamSegment
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegment
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[166,27] package TraceSegmentObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[166,58] cannot find symbol
     symbol:   variable TraceSegmentObject
     location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegment
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[249,19] package SpanObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[249,42] cannot find symbol
     symbol:   variable SpanObject
     location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[261,37] cannot find symbol
     symbol:   variable SpanType
     location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[263,37] cannot find symbol
     symbol:   variable SpanType
     location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[265,37] cannot find symbol
     symbol:   variable SpanType
     location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[47,27] package KeyWithStringValue does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[47,54] cannot find symbol
     symbol:   variable KeyWithStringValue
     location: class org.apache.skywalking.apm.agent.core.context.util.KeyValuePair
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[66,19] package LogMessage does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[66,48] cannot find symbol
     symbol:   variable LogMessage
     location: class org.apache.skywalking.apm.agent.core.context.trace.LogDataEntity
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[48,12] package CPU does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[48,34] cannot find symbol
     symbol:   variable CPU
     location: class org.apache.skywalking.apm.agent.core.jvm.cpu.CPUMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[41,14] cannot find symbol
     symbol:   class MemoryPool
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[41,52] cannot find symbol
     symbol:   class MemoryPool
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[44,13] cannot find symbol
     symbol:   class PoolType
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[46,24] cannot find symbol
     symbol:   variable PoolType
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[48,24] cannot find symbol
     symbol:   variable PoolType
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[50,24] cannot find symbol
     symbol:   variable PoolType
     location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [INFO] 100 errors
   [INFO] -------------------------------------------------------------
   [INFO] ------------------------------------------------------------------------
   [INFO] Reactor Summary:
   [INFO]
   [INFO] apm-checkstyle ..................................... SUCCESS [  1.835 s]
   [INFO] apm ................................................ SUCCESS [  1.691 s]
   [INFO] apm-commons ........................................ SUCCESS [  0.336 s]
   [INFO] apm-util ........................................... SUCCESS [  1.135 s]
   [INFO] apm-datacarrier .................................... SUCCESS [  0.784 s]
   [INFO] apm-protocol ....................................... SUCCESS [  0.297 s]
   [INFO] apm-network ........................................ SUCCESS [  2.300 s]
   [INFO] apm-sniffer ........................................ SUCCESS [  0.256 s]
   [INFO] apm-agent-core ..................................... FAILURE [  4.359 s]
   [INFO] apm-agent .......................................... SKIPPED
   [INFO] apm-test-tools ..................................... SKIPPED
   [INFO] apm-sdk-plugin ..................................... SKIPPED
   [INFO] dubbo-plugin ....................................... SKIPPED
   [INFO] jdbc-commons ....................................... SKIPPED
   [INFO] httpclient-4.x-plugin .............................. SKIPPED
   [INFO] jedis-2.x-plugin ................................... SKIPPED
   [INFO] tomcat-7.x-8.x-plugin .............................. SKIPPED
   [INFO] motan-plugin ....................................... SKIPPED
   [INFO] mongodb-plugin ..................................... SKIPPED
   [INFO] apm-feign-default-http-9.x-plugin .................. SKIPPED
   [INFO] okhttp-3.x-plugin .................................. SKIPPED
   [INFO] apm-sdk-plugin ..................................... SKIPPED
   [INFO] concurrent-util-4.x-plugin ......................... SKIPPED
   [INFO] resttemplate-4.3.x-plugin .......................... SKIPPED
   [INFO] mvc-annotation-commons ............................. SKIPPED
   [INFO] mvc-annotation-4.x-plugin .......................... SKIPPED
   [INFO] spring-cloud ....................................... SKIPPED
   [INFO] netflix-plugins .................................... SKIPPED
   [INFO] spring-cloud-feign-1.x-plugin ...................... SKIPPED
   [INFO] mvc-annotation-3.x-plugin .......................... SKIPPED
   [INFO] core-patch ......................................... SKIPPED
   [INFO] struts2-2.x-plugin ................................. SKIPPED
   [INFO] apm-sdk-plugin ..................................... SKIPPED
   [INFO] http-1.x-plugin .................................... SKIPPED
   [INFO] mvc-annotation-1.x-plugin .......................... SKIPPED
   [INFO] jetty-plugin ....................................... SKIPPED
   [INFO] jetty-client-9.x-plugin ............................ SKIPPED
   [INFO] jetty-server-9.x-plugin ............................ SKIPPED
   [INFO] jetty-client-9.0-plugin ............................ SKIPPED
   [INFO] spymemcached-2.x-plugin ............................ SKIPPED
   [INFO] sharding-jdbc-1.5.x-plugin ......................... SKIPPED
   [INFO] xmemcached-2.x-plugin .............................. SKIPPED
   [INFO] grpc-1.x-plugin .................................... SKIPPED
   [INFO] mysql-5.x-plugin ................................... SKIPPED
   [INFO] h2-1.x-plugin ...................................... SKIPPED
   [INFO] postgresql-8.x-plugin .............................. SKIPPED
   [INFO] rocketMQ-3.x-plugin ................................ SKIPPED
   [INFO] rocketMQ-4.x-plugin ................................ SKIPPED
   [INFO] elastic-job-2.x-plugin ............................. SKIPPED
   [INFO] apm-mongodb-2.x-plugin ............................. SKIPPED
   [INFO] httpasyncclient-4.x-plugin ......................... SKIPPED
   [INFO] apm-kafka-v1-plugin ................................ SKIPPED
   [INFO] apm-sdk-plugin ..................................... SKIPPED
   [INFO] servicecomb-java-chassis-0.x-plugin ................ SKIPPED
   [INFO] servicecomb-java-chassis-1.x-plugin ................ SKIPPED
   [INFO] apm-hystrix-1.x-plugin ............................. SKIPPED
   [INFO] jdk-cross-thread-plugin ............................ SKIPPED
   [INFO] apm-application-toolkit ............................ SKIPPED
   [INFO] apm-toolkit-log4j-1.x .............................. SKIPPED
   [INFO] apm-toolkit-activation ............................. SKIPPED
   [INFO] apm-toolkit-log4j-1.x-activation ................... SKIPPED
   [INFO] apm-toolkit-log4j-2.x-activation ................... SKIPPED
   [INFO] apm-toolkit-logback-1.x-activation ................. SKIPPED
   [INFO] apm-toolkit-opentracing ............................ SKIPPED
   [INFO] apm-toolkit-opentracing-activation ................. SKIPPED
   [INFO] apm-toolkit-trace .................................. SKIPPED
   [INFO] apm-toolkit-trace-activation ....................... SKIPPED
   [INFO] optional-plugins ................................... SKIPPED
   [INFO] optional-spring-plugins ............................ SKIPPED
   [INFO] apm-spring-annotation-plugin ....................... SKIPPED
   [INFO] apm-toolkit-log4j-2.x .............................. SKIPPED
   [INFO] apm-toolkit-logback-1.x ............................ SKIPPED
   [INFO] apm-collector ...................................... SKIPPED
   [INFO] apm-collector-core ................................. SKIPPED
   [INFO] apm-collector-instrument ........................... SKIPPED
   [INFO] apm-collector-component ............................ SKIPPED
   [INFO] client-component ................................... SKIPPED
   [INFO] apm-collector-cluster .............................. SKIPPED
   [INFO] collector-cluster-define ........................... SKIPPED
   [INFO] collector-cluster-redis-provider ................... SKIPPED
   [INFO] collector-cluster-standalone-provider .............. SKIPPED
   [INFO] apm-collector-configuration ........................ SKIPPED
   [INFO] collector-configuration-define ..................... SKIPPED
   [INFO] collector-cluster-zookeeper-provider ............... SKIPPED
   [INFO] server-component ................................... SKIPPED
   [INFO] apm-collector-grpc-manager ......................... SKIPPED
   [INFO] collector-grpc-manager-define ...................... SKIPPED
   [INFO] collector-grpc-manager-provider .................... SKIPPED
   [INFO] apm-collector-jetty-manager ........................ SKIPPED
   [INFO] collector-jetty-manager-define ..................... SKIPPED
   [INFO] collector-jetty-manager-provider ................... SKIPPED
   [INFO] apm-collector-naming ............................... SKIPPED
   [INFO] collector-naming-define ............................ SKIPPED
   [INFO] collector-naming-jetty-provider .................... SKIPPED
   [INFO] apm-collector-agent ................................ SKIPPED
   [INFO] agent-grpc ......................................... SKIPPED
   [INFO] agent-grpc-define .................................. SKIPPED
   [INFO] apm-collector-analysis ............................. SKIPPED
   [INFO] analysis-segment-parser ............................ SKIPPED
   [INFO] segment-parser-define .............................. SKIPPED
   [INFO] analysis-jvm ....................................... SKIPPED
   [INFO] jvm-define ......................................... SKIPPED
   [INFO] analysis-metric .................................... SKIPPED
   [INFO] metric-define ...................................... SKIPPED
   [INFO] analysis-register .................................. SKIPPED
   [INFO] register-define .................................... SKIPPED
   [INFO] agent-grpc-provider ................................ SKIPPED
   [INFO] agent-jetty ........................................ SKIPPED
   [INFO] agent-jetty-define ................................. SKIPPED
   [INFO] agent-jetty-provider ............................... SKIPPED
   [INFO] apm-collector-remote ............................... SKIPPED
   [INFO] collector-remote-define ............................ SKIPPED
   [INFO] apm-collector-storage .............................. SKIPPED
   [INFO] collector-storage-define ........................... SKIPPED
   [INFO] apm-collector-cache ................................ SKIPPED
   [INFO] collector-cache-define ............................. SKIPPED
   [INFO] analysis-worker-model .............................. SKIPPED
   [INFO] segment-parser-provider ............................ SKIPPED
   [INFO] register-provider .................................. SKIPPED
   [INFO] jvm-provider ....................................... SKIPPED
   [INFO] metric-provider .................................... SKIPPED
   [INFO] analysis-alarm ..................................... SKIPPED
   [INFO] alarm-define ....................................... SKIPPED
   [INFO] alarm-provider ..................................... SKIPPED
   [INFO] analysis-baseline .................................. SKIPPED
   [INFO] baseline-computing-define .......................... SKIPPED
   [INFO] baseline-computing-provider ........................ SKIPPED
   [INFO] apm-collector-ui ................................... SKIPPED
   [INFO] collector-ui-define ................................ SKIPPED
   [INFO] apm-ui-protocol .................................... SKIPPED
   [INFO] collector-ui-graphql ............................... SKIPPED
   [INFO] collector-ui-jetty-provider ........................ SKIPPED
   [INFO] collector-storage-es-provider ...................... SKIPPED
   [INFO] collector-storage-h2-provider ...................... SKIPPED
   [INFO] collector-remote-grpc-provider ..................... SKIPPED
   [INFO] collector-cache-guava-provider ..................... SKIPPED
   [INFO] collector-cache-caffeine-provider .................. SKIPPED
   [INFO] collector-configuration-provider ................... SKIPPED
   [INFO] apm-collector-boot ................................. SKIPPED
   [INFO] collector-remote-kafka-provider .................... SKIPPED
   [INFO] apm-webapp ......................................... SKIPPED
   [INFO] apache-skywalking-apm-incubating ................... SKIPPED
   [INFO] ------------------------------------------------------------------------
   [INFO] BUILD FAILURE
   [INFO] ------------------------------------------------------------------------
   [INFO] Total time: 13.972 s
   [INFO] Finished at: 2018-04-24T22:47:08-07:00
   [INFO] Final Memory: 82M/1114M
   [INFO] ------------------------------------------------------------------------
   [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.1:compile (default-compile) on project apm-agent-core: Compilation failure: Compilation failure:
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/ID.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[122,12] cannot find symbol
   [ERROR]   symbol:   class TraceSegmentReference
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/ID.java:[99,12] cannot find symbol
   [ERROR]   symbol:   class UniqueId
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.ids.ID
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/DistributedTraceId.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/DistributedTraceId.java:[57,12] cannot find symbol
   [ERROR]   symbol:   class UniqueId
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.ids.DistributedTraceId
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[30,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[31,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[161,12] cannot find symbol
   [ERROR]   symbol:   class UpstreamSegment
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegment
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[248,22] package SpanObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[46,12] cannot find symbol
   [ERROR]   symbol:   class KeyWithStringValue
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.util.KeyValuePair
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[65,12] cannot find symbol
   [ERROR]   symbol:   class LogMessage
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.LogDataEntity
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUProvider.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[22,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUProvider.java:[47,12] cannot find symbol
   [ERROR]   symbol:   class CPU
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.cpu.CPUProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[43,12] cannot find symbol
   [ERROR]   symbol:   class CPU
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.cpu.CPUMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[26,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolMetricAccessor.java:[23,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[40,17] cannot find symbol
   [ERROR]   symbol:   class MemoryPool
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolMetricAccessor.java:[29,10] cannot find symbol
   [ERROR]   symbol:   class MemoryPool
   [ERROR]   location: interface org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCProvider.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCMetricAccessor.java:[23,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCProvider.java:[52,17] cannot find symbol
   [ERROR]   symbol:   class GC
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.gc.GCProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCMetricAccessor.java:[29,10] cannot find symbol
   [ERROR]   symbol:   class GC
   [ERROR]   location: interface org.apache.skywalking.apm.agent.core.jvm.gc.GCMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCModule.java:[24,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCModule.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/GCModule.java:[41,17] cannot find symbol
   [ERROR]   symbol:   class GC
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.gc.GCModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[26,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[29,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[30,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[70,40] package ServiceNameDiscoveryServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/OperationNameDictionary.java:[150,9] cannot find symbol
   [ERROR]   symbol:   class SpanType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.dictionary.OperationNameDictionary.OperationNameKey
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/UnknowGC.java:[24,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/UnknowGC.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/gc/UnknowGC.java:[32,17] cannot find symbol
   [ERROR]   symbol:   class GC
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.gc.UnknowGC
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memory/MemoryProvider.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memory/MemoryProvider.java:[40,17] cannot find symbol
   [ERROR]   symbol:   class Memory
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memory.MemoryProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/os/OSUtil.java:[31,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/os/OSUtil.java:[98,19] cannot find symbol
   [ERROR]   symbol:   class OSInfo
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.os.OSUtil
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[37,1] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[54,52] package ApplicationRegisterServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[55,50] package InstanceDiscoveryServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[56,53] package ServiceNameDiscoveryServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java:[57,55] package NetworkAddressRegisterServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[26,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[27,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[28,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[29,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/NetworkAddressDictionary.java:[56,42] package NetworkAddressRegisterServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[35,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[36,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[37,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java:[57,45] package TraceSegmentServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolProvider.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolProvider.java:[51,17] cannot find symbol
   [ERROR]   symbol:   class MemoryPool
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolProvider
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/UnknownMemoryPool.java:[24,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/UnknownMemoryPool.java:[25,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/UnknownMemoryPool.java:[32,17] cannot find symbol
   [ERROR]   symbol:   class MemoryPool
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.UnknownMemoryPool
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[38,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[39,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[40,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[59,33] cannot find symbol
   [ERROR]   symbol:   class JVMMetric
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.JVMService
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/JVMService.java:[128,47] package JVMMetricsServiceGrpc does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/ExitSpan.java:[23,47] package org.apache.skywalking.apm.network.proto does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/ExitSpan.java:[121,32] package SpanObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[123,30] package TraceSegmentReference does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[123,52] cannot find symbol
   [ERROR]   symbol:   variable TraceSegmentReference
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[125,35] cannot find symbol
   [ERROR]   symbol:   variable RefType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegmentRef.java:[133,35] cannot find symbol
   [ERROR]   symbol:   variable RefType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegmentRef
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ids/ID.java:[100,16] cannot find symbol
   [ERROR]   symbol:   variable UniqueId
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.ids.ID
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[162,24] package UpstreamSegment does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[162,51] cannot find symbol
   [ERROR]   symbol:   variable UpstreamSegment
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegment
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[166,27] package TraceSegmentObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/TraceSegment.java:[166,58] cannot find symbol
   [ERROR]   symbol:   variable TraceSegmentObject
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.TraceSegment
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[249,19] package SpanObject does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[249,42] cannot find symbol
   [ERROR]   symbol:   variable SpanObject
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[261,37] cannot find symbol
   [ERROR]   symbol:   variable SpanType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[263,37] cannot find symbol
   [ERROR]   symbol:   variable SpanType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java:[265,37] cannot find symbol
   [ERROR]   symbol:   variable SpanType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.AbstractTracingSpan
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[47,27] package KeyWithStringValue does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/util/KeyValuePair.java:[47,54] cannot find symbol
   [ERROR]   symbol:   variable KeyWithStringValue
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.util.KeyValuePair
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[66,19] package LogMessage does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/trace/LogDataEntity.java:[66,48] cannot find symbol
   [ERROR]   symbol:   variable LogMessage
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.context.trace.LogDataEntity
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[48,12] package CPU does not exist
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/cpu/CPUMetricAccessor.java:[48,34] cannot find symbol
   [ERROR]   symbol:   variable CPU
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.cpu.CPUMetricAccessor
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[41,14] cannot find symbol
   [ERROR]   symbol:   class MemoryPool
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[41,52] cannot find symbol
   [ERROR]   symbol:   class MemoryPool
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[44,13] cannot find symbol
   [ERROR]   symbol:   class PoolType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[46,24] cannot find symbol
   [ERROR]   symbol:   variable PoolType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[48,24] cannot find symbol
   [ERROR]   symbol:   variable PoolType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] /Users/ajanthan/work/learning/incubator-skywalking/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/jvm/memorypool/MemoryPoolModule.java:[50,24] cannot find symbol
   [ERROR]   symbol:   variable PoolType
   [ERROR]   location: class org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolModule
   [ERROR] -> [Help 1]
   [ERROR]
   [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
   [ERROR] Re-run Maven using the -X switch to enable full debug logging.
   [ERROR]
   [ERROR] For more information about the errors and possible solutions, please read the following articles:
   [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
   [ERROR]
   [ERROR] After correcting the problems, you can resume the build with the command
   [ERROR]   mvn <goals> -rf :apm-agent-core
   
   ___
   ### Bug
   - Which version of SkyWalking, OS and JRE?
   
   - Which company or project?
   
   - What happen?
   If possible, provide a way for reproducing the error. e.g. demo application, component version.
   
   ___
   ### Requirement or improvement
   - Please describe about your requirements or improvement suggestions.

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