logstash找不到jdk

Question

I want to start using logstash and elastic search. I followd the documentation from elastic

https://www.elastic.co/guide/en/logstash/current/getting-started-with-logstash.html

and I want to start with this first demo command.I work on windows 10 64 bit. So I downloaded the logstash.zip, opened the cmd and moved to the

C:\\Program Files\\Logstash\\logstash-6.3.1\\bin>

folder. After that I entered

logstash -e 'input { stdin { } } output { stdout {} }'

and then I got an error that

Files\\Java\\jdk1.8.0_144\\bin can't be found or loaded. (Sorry I develop in german and I don't know the english error message)

I run eclipse and Java on this pc and the command

javac

shows

> Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are used
  -classpath <path>          Specify where to find user class files and annotation processors
  -cp <path>                 Specify where to find user class files and annotation processors
  -sourcepath <path>         Specify where to find input source files
  -bootclasspath <path>      Override location of bootstrap class files
  -extdirs <dirs>            Override location of installed extensions
  -endorseddirs <dirs>       Override location of endorsed standards path
  -proc:{none,only}          Control whether annotation processing and/or compilation is done.
  -processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process
  -processorpath <path>      Specify where to find annotation processors
  -parameters                Generate metadata for reflection on method parameters
  -d <directory>             Specify where to place generated class files
  -s <directory>             Specify where to place generated source files
  -h <directory>             Specify where to place generated native header files
  -implicit:{none,class}     Specify whether or not to generate class files for implicitly referenced files
  -encoding <encoding>       Specify character encoding used by source files
  -source <release>          Provide source compatibility with specified release
  -target <release>          Generate class files for specific VM version
  -profile <profile>         Check that API used is available in the specified profile
  -version                   Version information
  -help                      Print a synopsis of standard options
  -Akey[=value]              Options to pass to annotation processors
  -X                         Print a synopsis of nonstandard options
  -J<flag>                   Pass <flag> directly to the runtime system
  -Werror                    Terminate compilation if warnings occur
  @<filename>                Read options and filenames from file

and

java -version

outputs

java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

so I guess this should be fine. Can anyone help me why logstash can't find it? Do I have to set some extra stuff? In Systemvariables I set jdk and jre to the "Path" Variable and I made a JAVA_HOME variable in Users Variables. Thanks in advance

Answer 1

Looks like your JAVA_HOME and PATH is messed up. It has to be something like this

JAVA_HOME = C:\Program Files\Java\jdk1.7.0_25 
PATH = C:\Program Files\Java\jdk1.7.0_25\bin

To cross check you can try this in terminal

echo %JAVA_HOME%

and

javac -version

to check class PATH variable.

You can refer this link for step to step process to set variables.