关于java.io.IOException: HADOOP
报错如下：300 DEBUG org.apache.hadoop.util.Shell- Failed to detect a valid hadoop home directory
java.io.IOException: HADOOP_HOME or hadoop.home.dir are not
set
解决办法一：
根据 http://blog.csdn.net/baidu_19473529/article/details/54693523 配置hadoop_home变量
下载winutils地址https://github.com/srccodes/hadoop-common-2.2.0-bin下载解压
依然报相同的错误
解决办法二：
在java程序中加入
System.setProperty("hadoop.home.dir", "/usr/local/hadoop-2.6.0");
依然报错
解决办法三：
根据该提示：
依然报错
--------------------------------5.19.早晨------------------------------------------
今天早上再次执行该程序，将上传到HDFS部分的代码给注释掉后发现日志报错信息如下：
132 DEBUG org.apache.hadoop.util.NativeCodeLoader- Trying to load the custom-built native-hadoop library...
134 DEBUG org.apache.hadoop.util.NativeCodeLoader- Failed to load native-hadoop with error: java.lang.UnsatisfiedLinkError: no hadoop in java.library.path
1）check Hadoop library：
root@Ubuntu-1:/usr/local/hadoop-2.6.0/lib/native# file libhadoop.so.1.0.0
It's 64-bite library
2）Try adding the HADOOP_OPTS environment variable:
root@Ubuntu-1:~# vi /etc/profile //environment variable
export HADOOP_OPTS="-Djava.library.path=${HADOOP_HOME}/lib/native/"
It doesn't work, and reports the same error.
3）Try adding the HADOOP_OPTS and HADOOP_COMMON_LIB_NATIVE_DIR environment variable:
export HADOOP_COMMON_LIB_NATIVE_DIR=${HADOOP_HOME}/lib/native
export HADOOP_OPTS="-Djava.library.path=${HADOOP_HOME}/lib/"
It still doesn't work, and reports the same error.
4）Adding the Hadoop library into LD_LIBRARY_PATH
root@Ubuntu-1:~# vi .bashrc export LD_LIBRARY_PATH=/usr/local/hadoop/lib/native/:$LD_LIBRARY_PATH
It doesn't work, and reports the same error.
5）append word native to HADOOP_OPTS like this
export HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$HADOOP_HOME/lib/native"
It doesn't work, and reports the same error.
-----------------------------------5.20早晨-------------------------
win下依旧无法使用java代码上传文件到HDFS
----------------------------------5.24------------
copy了一份hadoop-2.6.0文件到本机，更改bin目录和path ，显示无效的path，遂更改回去
---------------------2017.5.26-------------------
今天早上开机 试了一下 发现它已经好了其实上述的设置已经可以解决大部分遇到这类问题的人群
页:
[1]