连接被拒绝错误Hadoop Mac答案

【问题标题】：Connection Refused Error Hadoop Mac连接被拒绝错误Hadoop Mac
【发布时间】：2015-11-18 15:09:57
【问题描述】：

我正在尝试安装 Hadoop。我安装了几乎所有东西，所有那些 XML 文档编辑和东西。我还安装了 Java，我很确定我做得对。当我发出$hstart 命令时（我已经为它配置了一个别名来启动hadoop），我收到以下错误：

/usr/local/hadoop/bin/hdfs: line 309: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: No such file or directory
/usr/local/hadoop/bin/hdfs: line 309: exec: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: cannot execute: No such file or directory
Starting namenodes on []
localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-TejasBelvalkar-namenode-Tejass-iMac.local.out
localhost: /usr/local/hadoop/bin/hdfs: line 309: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: No such file or directory
localhost: /usr/local/hadoop/bin/hdfs: line 309: exec: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: cannot execute: No such file or directory
localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-TejasBelvalkar-datanode-Tejass-iMac.local.out
localhost: /usr/local/hadoop/bin/hdfs: line 309: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: No such file or directory
localhost: /usr/local/hadoop/bin/hdfs: line 309: exec: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: cannot execute: No such file or directory
/usr/local/hadoop/bin/hdfs: line 309: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: No such file or directory
/usr/local/hadoop/bin/hdfs: line 309: exec: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: cannot execute: No such file or directory
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-TejasBelvalkar-resourcemanager-Tejass-iMac.local.out
/usr/local/hadoop/bin/yarn: line 335: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: No such file or directory
/usr/local/hadoop/bin/yarn: line 335: exec: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: cannot execute: No such file or directory
localhost: starting nodemanager, logging to /usr/local/hadoop/logs/yarn-TejasBelvalkar-nodemanager-Tejass-iMac.local.out
localhost: /usr/local/hadoop/bin/yarn: line 335: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: No such file or directory
localhost: /usr/local/hadoop/bin/yarn: line 335: exec: /usr/lib/jvm/java-7-openjdk-amd64/bin/java: cannot execute: No such file or directory

现在我看到它的方式，我想我需要设置我的 jvm 安装路径。

【问题讨论】：

标签： java macos hadoop jvm

【解决方案1】：

上面写的很清楚

/usr/lib/jvm/java-7-openjdk-amd64/bin/java：无法执行：没有这样的文件或目录

这意味着您的JAVA_HOME 存在问题。（检查该目录是否确实存在。如果存在，则检查JAVA_HOME 变量。）

注意：JAVA_HOME 不应包含您的 /bin 目录，%JAVA_HOME%/bin 应出现在您的路径中。

【讨论】：

我看到了，很明显它不存在。但是我应该如何改变它。我确实尝试通过将JAVA_HOME 和HADOOP_PREFIX 以及.bash_profile 更改为我在$ /usr/libexec/java_home 命令之后获得的java 路径来编辑hadoop-env.sh。或者我应该使用$ which java 命令？ $ which java 显示 /usr/bin/java 和 $ /usr/libexec/java_home 显示 /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home。用哪一个？

【解决方案2】：

要在本地运行 Hadoop，您必须能够通过 SSH localhost
例如：$ ssh localhost 如果连接被拒绝，请通过

启用远程登录

Preference > Sharing > Remote login (enable this option)

启用此远程登录后尝试

【讨论】：