[Error record] An error is reported when installing the Hadoop operating environment ( Error: JAVA_HOME is incorrectly set. Please update xxx\hadoop-env.cmd )

Summarize :

报错 : Error: JAVA_HOME is incorrectly set. Please update xxx\hadoop-env.cmd

JDK is installed in the C:\Program Files\ directory, and the installation directory Program Files has spaces, which is too pitiful;

Change to a JDK directory without spaces;

1. Error message

---

Install the Hadoop runtime environment,

After completing the above installation steps, run the hadoop command and report an error;

C:\Windows\system32>hadoop -version
The system cannot find the path specified.
Error: JAVA_HOME is incorrectly set.
     Please update D:\001_Develop\052_Hadoop\hadoop-3.3.4\etc\hadoop\hadoop-env.cmd
‘-Xmx512m’ is not recognized as an internal or external command,
operable program or batch file.

The error message is as follows:

C:\Windows\system32>hadoop -version
The system cannot find the path specified.
Error: JAVA_HOME is incorrectly set.
       Please update D:\001_Develop\052_Hadoop\hadoop-3.3.4\etc\hadoop\hadoop-env.cmd
'-Xmx512m' is not recognized as an internal or external command,
operable program or batch file.

C:\Windows\system32>hadoop -version
The system cannot find the path specified.
Error: JAVA_HOME is incorrectly set.
       Please update D:\001_Develop\052_Hadoop\hadoop-3.3.4\etc\hadoop\hadoop-env.cmd
'-Xmx512m' is not recognized as an internal or external command,
operable program or batch file.

2. Problem analysis

---

Core error message:

Error: JAVA_HOME is incorrectly set.
     Please update D:\001_Develop\052_Hadoop\hadoop-3.3.4\etc\hadoop\hadoop-env.cmd

That is the JAVA_HOME setting error in the D:\001_Develop\052_Hadoop\hadoop-3.3.4\etc\hadoop\hadoop-env.cmd file;

The settings are as follows:

set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_91

The problem lies in this path, which is the actual path of JDK;

But there is a space in the path, which leads to an error when running Hadoop;

3. Solutions

---

Change to a JDK without spaces:

set JAVA_HOME=D:\001_Develop\031_Java8u144_Frida\jdk1.8.0_144

run again

hadoop -version

command, at this time Hadoop runs successfully;

C:\Windows\system32>hadoop -version
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) Client VM (build 25.144-b01, mixed mode)

run

hadoop

command, can run correctly;

C:\Windows\system32>hadoop
Usage: hadoop [--config confdir] [--loglevel loglevel] COMMAND
where COMMAND is one of:
  fs                   run a generic filesystem user client
  version              print the version
  jar <jar>            run a jar file
                       note: please use "yarn jar" to launch
                             YARN applications, not this command.
  checknative [-a|-h]  check native hadoop and compression libraries availability
  conftest             validate configuration XML files
  distch path:owner:group:permisson
                       distributed metadata changer
  distcp <srcurl> <desturl> copy file or directories recursively
  archive -archiveName NAME -p <parent path> <src>* <dest> create a hadoop archive
  classpath            prints the class path needed to get the
                       Hadoop jar and the required libraries
  credential           interact with credential providers
  jnipath              prints the java.library.path
  kerbname             show auth_to_local principal conversion
  kdiag                diagnose kerberos problems
  key                  manage keys via the KeyProvider
  trace                view and modify Hadoop tracing settings
  daemonlog            get/set the log level for each daemon
 or
  CLASSNAME            run the class named CLASSNAME

Most commands print help when invoked w/o parameters.