Logstash -Could not find any executable java binary - linux

Question

I have ELK installed on a VM in my laptop.Elasticsearch is up and running.
./bin/logstash -f logstash-filter.conf gives me the below error
Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME.
I tried setting up JAVA_HOME and $ PATH, still the issue is persistent. Am I missing something?
which java
/usr/bin/java
java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.5) (7u79-2.5.5-0ubuntu0.14.04.2)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)
echo $JAVA_HOME
/usr/local/java/jdk1.8.0_45
echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/divija/bin:/usr/local/java/jdk1.8.0_45/bin
logstash-filter.conf
input { stdin { } }
filter {
grok {
match => { "message" => "%{COMBINEDAPACHELOG}" }
}
date {
match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ]
}
}
output {
elasticsearch { host => localhost
index=>"myindex"
}
stdout { codec => rubydebug }`enter code here`
}

Answer 1

I had to
export JAVACMD=`which java`
to make this work.

Answer 2

I know, it's an old thread, but I was also having the same problem and was doing a very silly thing.
I had updated my $JAVA_HOME var in /etc/environment but was not reloading the file because of which it was not taking effect, and running source /etc/environment solved my problem.