Hadoop 2.6.0:基本错误“正在启动 MRAppMaster"安装后 [英] Hadoop 2.6.0: Basic error "starting MRAppMaster" after installing

问题描述

我刚刚开始使用 Hadoop 2.

I have just started to work with Hadoop 2.

使用基本配置安装后，我总是无法运行任何示例.有没有人看到这个问题，请帮助我?

After installing with basic configs, I always failed to run any examples. Has anyone seen this problem and please help me?

错误类似于

Error starting MRAppMaster
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException

这是日志

20152015-01-06 11:56:23,194 INFO [main] org.apache.hadoop.mapreduce.v2.app.MRAppMaster: Created MRAppMaster for application appattempt_1420510526926_0002_000001
2015-01-06 11:56:23,362 FATAL [main] org.apache.hadoop.mapreduce.v2.app.MRAppMaster: Error starting MRAppMaster

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:131)
at org.apache.hadoop.security.Groups.<init>(Groups.java:70)
at org.apache.hadoop.security.Groups.<init>(Groups.java:66)
at org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:280)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:271)
at org.apache.hadoop.security.UserGroupInformation.setConfiguration(UserGroupInformation.java:299)
at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.initAndStartAppMaster(MRAppMaster.java:1473)
at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1429)

Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:129)
... 7 more

Caused by: java.lang.UnsatisfiedLinkError: org.apache.hadoop.security.JniBasedUnixGroupsMapping.anchorNative()V
at org.apache.hadoop.security.JniBasedUnixGroupsMapping.anchorNative(Native Method)
at org.apache.hadoop.security.JniBasedUnixGroupsMapping.<clinit>(JniBasedUnixGroupsMapping.java:49)
at org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback.<init>(JniBasedUnixGroupsMappingWithFallback.java:39)
... 12 more

2015-01-06 11:56:23,366 INFO [main] org.apache.hadoop.util.ExitUtil: Exiting with status 1

推荐答案

错误信息:错误启动 MRAppMaster"、InvocationTargetException"、UnsatisfiedLinkError"

Error messages: "Error starting MRAppMaster", "InvocationTargetException", "UnsatisfiedLinkError"

根本原因:无法执行org.apache.hadoop.security.JniBasedUnixGroupsMapping"类中的原生函数anchorNative"

Root cause: Fail to execute the native function "anchorNative" in the class "org.apache.hadoop.security.JniBasedUnixGroupsMapping"

说明:函数anchorNative"将调用库libhadoop.so"中的函数.这个库的路径由这些环境变量指定:

Description: the function "anchorNative" will call a function in the library "libhadoop.so". The path of this library is specified by these environment variables:

export JAVA_LIBRARY_PATH
export HADOOP_COMMON_LIB_NATIVE_DIR

在Hadoop源码中，通过

In the Hadoop source code, print the java library class path by

System.err.println( (System.getProperty("java.library.path") );

# result
/home/maidinh/hadoop2/build/hadoop-2.6.0-src/hadoop-dist/target/hadoop-2.6.0/lib/native:
/usr/java/packages/lib/amd64:
/usr/lib64:
/lib64:
/lib:
/usr/lib

库libhadoop.so"的不同版本可以在这些产生冲突的位置找到.

Different versions of the library "libhadoop.so" can be found in these locations that make a conflict.

解决方法:除了native库的正确路径(在hadoop-2.6.0/lib/native中)，删除其他目录下的所有libhadoop.so".

Solution: Except the right path of native library (in hadoop-2.6.0/lib/native), delete all "libhadoop.so" in other directories.

注意事项:删除hadoop的所有相关库

Notes: delete all related libraries of hadoop

rm -r libhadoop*
rm -r libhdfs*

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