我收到有关的未知主机异常，名称服务已正确维护在hdfs-site.xml和core-site.xml中。
019-01-14 03:46:48,564 FATAL [main] org.apache.hadoop.mapreduce.v2.app.MRAppMaster: Error starting MRAppMaster
java.lang.ExceptionInInitializerError
at org.apache.hadoop.hbase.security.token.AuthenticationTokenIdentifier.readFields(AuthenticationTokenIdentifier.java:142)
at org.apache.hadoop.security.token.Token.decodeIdentifier(Token.java:145)
at org.apache.hadoop.security.token.Token.identifierToString(Token.java:349)
at org.apache.hadoop.security.token.Token.toString(Token.java:369)
at org.apache.log4j.or.DefaultRenderer.doRender(DefaultRenderer.java:37)
at org.apache.log4j.or.RendererMap.findAndRender(RendererMap.java:80)
at org.apache.log4j.spi.LoggingEvent.getRenderedMessage(LoggingEvent.java:368)
at org.apache.log4j.helpers.PatternParser$BasicPatternConverter.convert(PatternParser.java:402)
at org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:65)
at org.apache.log4j.PatternLayout.format(PatternLayout.java:506)
at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:310)
at org.apache.log4j.WriterAppender.append(WriterAppender.java:162)
at org.apache.hadoop.yarn.ContainerLogAppender.append(ContainerLogAppender.java:66)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
at org.apache.log4j.Category.callAppenders(Category.java:206)
at org.apache.log4j.Category.forcedLog(Category.java:391)
at org.apache.log4j.Category.log(Category.java:856)
at org.apache.commons.logging.impl.Log4JLogger.info(Log4JLogger.java:176)
at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.initAndStartAppMaster(MRAppMaster.java:1579)
at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1526)
Caused by: java.lang.IllegalArgumentException: java.net.UnknownHostException: Nameservice2
at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:439)
at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:321)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:176)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:690)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:631)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:160)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2795)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:99)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2829)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2811)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:390)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)
at org.apache.hadoop.hbase.util.DynamicClassLoader.initTempDir(DynamicClassLoader.java:118)
at org.apache.hadoop.hbase.util.DynamicClassLoader.<init>(DynamicClassLoader.java:98)
at org.apache.hadoop.hbase.protobuf.ProtobufUtil.<clinit>(ProtobufUtil.java:251)
... 21 more
Caused by: java.net.UnknownHostException: Nameservice2
工作流程xml的内容。
<credentials>
<credential name="hive2_credentials" type="hive2">
....
</credential>
<credential name="hbaseauth" type="hbase"/>
</credentials>
<action cred="hbaseauth,hive_credentials" name="pig0">
<pig>
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<job-xml>/user/oozie/hbase-site.xml</job-xml>
<configuration>
<property>
<name>mapred.job.queue.name</name>
.......
运行简单的Mapreduce作业时，除从oozie提交外，其工作正常。 让我知道缺少了什么！