升级nutch时遇到的guava版本冲突

基于nutch的抓取服务，最近把nutch1.13升级到1.16， 升级后本地运行成功，远程运行失败，错误如下：

2019-11-21 16:20:22,452 FATAL [main] org.apache.hadoop.mapreduce.v2.app.MRAppMaster: Error starting MRAppMaster
java.lang.NoSuchMethodError: com.google.common.base.Objects.toStringHelper(Ljava/lang/Object;)Lcom/google/common/base/Objects$ToStringHelper;
	at org.apache.hadoop.metrics2.lib.MetricsRegistry.toString(MetricsRegistry.java:406)
	at java.lang.String.valueOf(String.java:2994)
	at java.lang.StringBuilder.append(StringBuilder.java:131)
	at org.apache.hadoop.ipc.metrics.RpcMetrics.(RpcMetrics.java:74)
	at org.apache.hadoop.ipc.metrics.RpcMetrics.create(RpcMetrics.java:80)
	at org.apache.hadoop.ipc.Server.(Server.java:2218)
	at org.apache.hadoop.ipc.RPC$Server.(RPC.java:938)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server.(ProtobufRpcEngine.java:534)
	at org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRpcEngine.java:509)
	at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:783)
	at org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.createServer(RpcServerFactoryPBImpl.java:169)
	at org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.getServer(RpcServerFactoryPBImpl.java:132)
	at org.apache.hadoop.yarn.ipc.HadoopYarnProtoRPC.getServer(HadoopYarnProtoRPC.java:65)
	at org.apache.hadoop.mapreduce.v2.app.client.MRClientService.serviceStart(MRClientService.java:119)
	at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.serviceStart(MRAppMaster.java:1107)
	at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$4.run(MRAppMaster.java:1519)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.initAndStartAppMaster(MRAppMaster.java:1515)
	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1448)
2019-11-21 16:20:22,455 INFO [main] org.apache.hadoop.util.ExitUtil: Exiting with status 1

看了下依赖，，
确实里面已经没有 ToStringHelper 方法了。

改回之前的版本，。

编译成功，顺利运行。