小编Bru*_*yne的帖子

在几种情况下，我一直遇到以下错误：

2017-03-23 11:55:10,794 INFO [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: Diagnostics report from attempt_1490079327128_0048_r_000003_0: Container killed by the ApplicationMaster.

Container killed on request. Exit code is 143
Container exited with a non-zero exit code 143

我注意到它发生了很多种，但是当我更改“排序分配内存”时，它没有帮助。

我曾尝试更改其他内存属性，但该解决方案使我难以理解。是否对Mapreduce的工作原理以及不同组件之间的相互作用有很好的解释？我应该改变什么？我在哪里找到导致此错误的Java错误？

在tomcat上启动drools服务时遇到错误.

12-Jul-2017 11:16:42.203 INFO [http-nio-8090-exec-1] org.apache.catalina.core.ApplicationContext.log HTMLManager: start: Starting web application '/kie-drools-wb-7.0.0.Final-tomcat8'
12-Jul-2017 11:17:07.252 SEVERE [http-nio-8090-exec-1] org.apache.catalina.core.ApplicationContext.log FAIL - Application at context path [/kie-drools-wb-7.0.0.Final-tomcat8] could not be started
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/kie-drools-wb-7.0.0.Final-tomcat8]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1307)
    at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:665)
    at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:211)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) …

alpesh@alpesh-Inspiron-3647:~/hadoop-2.7.2/sbin$ hadoop fs -ls 16/07/05 13:59:17 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

它还向我展示了如下输出

hadoop check native -a 16/07/05 14:00:42 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Native library checking: hadoop: false zlib: false snappy: false lz4: false bzip2: false openssl: false 16/07/05 14:00:42 INFO util.ExitUtil: Exiting with status 1

请帮我解决这个问题

我在执行时遇到此错误 start-dfs.sh

Starting namenodes on [localhost] 
pdsh@Gaurav: localhost: rcmd: socket: Permission denied 
Starting datanodes
pdsh@Gaurav: localhost: rcmd: socket: Permission denied
Starting secondary namenodes [Gaurav]
pdsh@Gaurav: Gaurav: rcmd: socket: Permission denied 2017-03-13 09:39:29,559 
WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

使用hadoop 3.0 alpha 2版本.

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我正在尝试重置我的Cloud Shell磁盘。我正在删除项目并创建新的，但是所有预装文件都使用相同的云外壳。反正有没有完全重置。

我在现有的CDH 5.5.2集群上安装Kafka-2.0,这是我遵循的程序

1. 从CM添加服务
2. 选定的Kafka(在此之前,我在所有节点上下载并分发并激活了kafka parcel)
3. 为KafkaBroker选择1个节点,为Kafka MirrorMaker选择4个节点
4. 然后我用一个Mirror Maker节点以及具有相同节点的Source Broker List(source.bootstrap.servers)更新了我的目标代理列表(bootstrap.servers)属性

5. 我得到的错误(日志文件)

   Fatal error during KafkaServerStartable startup. Prepare to shutdown 
   java.lang.OutOfMemoryError: Java heap space
       at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57)
       at java.nio.ByteBuffer.allocate(ByteBuffer.java:331)
       at kafka.log.SkimpyOffsetMap.<init>(OffsetMap.scala:43)
       at kafka.log.LogCleaner$CleanerThread.<init>(LogCleaner.scala:186)
       at kafka.log.LogCleaner$$anonfun$1.apply(LogCleaner.scala:83)
       at kafka.log.LogCleaner$$anonfun$1.apply(LogCleaner.scala:83)
       at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
       at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
       at scala.collection.immutable.Range.foreach(Range.scala:166)
       at scala.collection.TraversableLike$class.map(TraversableLike.scala:245)
       at scala.collection.AbstractTraversable.map(Traversable.scala:104)
       at kafka.log.LogCleaner.<init>(LogCleaner.scala:83)
       at kafka.log.LogManager.<init>(LogManager.scala:64)
       at kafka.server.KafkaServer.createLogManager(KafkaServer.scala:601)
       at kafka.server.KafkaServer.startup(KafkaServer.scala:180)
       at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:37)
       at kafka.Kafka$.main(Kafka.scala:67)
       at com.cloudera.kafka.wrap.Kafka$.main(Kafka.scala:76)
       at com.cloudera.kafka.wrap.Kafka.main(Kafka.scala)
   

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