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我有一个小型集群，使用 Cloudera CDH4 Hadoop 和 Map Reduce v1 运行。Namenode/Secondary Namenode/Jobtracker 都在不同的机器上。我的三台服务器也充当 Zookeeper 服务器。

我正在尝试在此集群之上安装 Accumulo 1.4.4。我对 Accumulo 1.5.0 有同样的行为。我能够bin/accumulo init初始化 Accumulo，但启动单个组件失败。我正在尝试让我的 Namenode 成为 Accumulo 大师。

bin/start-server.sh localhost monitor吐出一个非常令人鼓舞的Starting monitor on localhost，但没有任何开始。如果我检查 logs/monitor_localhost.err 我会找到一个堆栈跟踪：

-bash-4.1$ cat logs/monitor_localhost.err
Thread "monitor" died null
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:622)
    at org.apache.accumulo.start.Main$1.run(Main.java:91)
    at java.lang.Thread.run(Thread.java:701)
Caused by: java.lang.ExceptionInInitializerError
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2464)
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2456)
    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2323)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:351)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:163)
    at org.apache.accumulo.core.file.FileUtil.getFileSystem(FileUtil.java:554)
    at org.apache.accumulo.core.client.ZooKeeperInstance.getInstanceIDFromHdfs(ZooKeeperInstance.java:258)
    at org.apache.accumulo.server.conf.ZooConfiguration.getInstance(ZooConfiguration.java:65)
    at org.apache.accumulo.server.conf.ServerConfiguration.getZooConfiguration(ServerConfiguration.java:49)
    at org.apache.accumulo.server.conf.ServerConfiguration.getSystemConfiguration(ServerConfiguration.java:58)
    at org.apache.accumulo.server.monitor.Monitor.run(Monitor.java:440)
    at org.apache.accumulo.server.monitor.Monitor.main(Monitor.java:433)
    ... 6 more
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission accessDeclaredMembers)
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:399)
    at java.security.AccessController.checkPermission(AccessController.java:557)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at java.lang.Class.checkMemberAccess(Class.java:2237)
    at java.lang.Class.getDeclaredFields(Class.java:1805)
    at org.apache.hadoop.util.ReflectionUtils.getDeclaredFieldsIncludingInherited(ReflectionUtils.java:315)
    at org.apache.hadoop.metrics2.lib.MetricsSourceBuilder.initRegistry(MetricsSourceBuilder.java:92)
    at org.apache.hadoop.metrics2.lib.MetricsSourceBuilder.<init>(MetricsSourceBuilder.java:56)
    at org.apache.hadoop.metrics2.lib.MetricsAnnotations.newSourceBuilder(MetricsAnnotations.java:42)
    at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:212)
    at org.apache.hadoop.metrics2.MetricsSystem.register(MetricsSystem.java:54)
    at org.apache.hadoop.security.UserGroupInformation$UgiMetrics.create(UserGroupInformation.java:97)
    at org.apache.hadoop.security.UserGroupInformation.<clinit>(UserGroupInformation.java:190)
    ... 18 more

AccessControlException: access denied 对我来说似乎很重要，但我无法想象哪些访问受到限制。我以 hdfs 用户身份运行所有内容，该用户拥有整个 /opt/accumulo-1.4.4/ 目录，其中 accumulo 未解压缩。HDFS 中的 /accumulo 目录也归 hdfs 用户所有。SELinux 是允许的。网上搜了没结果，有没有人处理过这个错误？

非常感谢。

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1 回答 1

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I started browsing the Apache accumulo-users mailing list archive and came across the solution.

http://mail-archives.apache.org/mod_mbox/accumulo-user/201312.mbox/%3CB9CB2B2BF27F0F46B8ECF781831E00E710970A9F%400015-its-exmb10.us.saic.com%3E

I was copying the accumulo.policy.example to accumulo.policy because I thought I needed it in my configuration. Once I deleted the accumulo.policy file my issues went away and I've been able to stand up Accumulo (1.5.0 at least, 1.4.4 still has some issues for me)

于 2013-12-27T15:24:07.297 回答