I also encounter such strange question, the first time it raises exception for running elastic as root, after I add a new user elastic and run it as elastic , I see this exception "Could not find or load main class org.elasticsearch.tools.launchers.JavaVersionChecker".
Hi everyone.
I'm trying to install Elasticsearch 7.12.1 on a server for a customer.
The OS is Ubuntu Server 9.3.0-17 aka 20.04 (the LTS one).
OpenJDK 16 included.
This server is offline so I downloaded the deb package : elasticsearch-7.12.1-amd64.deb
I installed it accoding to the following documentation : Install Elasticsearch with Debian Package | Elasticsearch Guide [7.12] | Elastic
I then copied my version of elasticsearch.yml to /etc/elastic/ folder.
Everything works fine until reaching the "Running with systemd" section.
When I tried to run sudo systemctl start elasticsearch.service, an error occured.
First, it told me jvm.options was missing.
I found it from the elasticsearch-7.12.1-linux-x86_64.tar.gz archive and copied it with a sudo cp jvm.options /etc/elastic/jvm.options
After that, I had another error :
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i get error:
Error: Could not find or load main class org.elasticsearch.tools.JavaVersionChecker
Elasticsearch requires at least Java 8 but your Java version from /usr/bin/java does not meet this requirement
It's not clear to me how you've built your Docker image but all Elasticsearch distributions since 5.3.0 ship with a jar that contains org.elasticsearch.tools.JavaVersionChecker but it's clear that somehow you've lost that jar file. This is the root of your problem. Without more details, we can not help.
still i got this error: [siva@kfos-vmelk-1 bin]$ ./elasticsearch
Error: Could not find or load main class org.elasticsearch.tools.JavaVersionChecker
Elasticsearch requires at least Java 8 but your Java version from /bin/java does not meet this requirement
The problem might not appear be your Java version, the problem appears to be with your Elasticsearch installation first. Can you please list the contents of ../lib (from the directory where you were executing elasticsearch which you show as bin, go down one directory, and then into the lib directory. Please show the entire contents here.
/root/elk/5.3.2/elasticsearch-5.3.2/lib
[root@kfos-vmelk-1 lib]# ls
elasticsearch-5.3.2.jar jackson-dataformat-yaml-2.8.6.jar log4j-1.2-api-2.7.jar lucene-grouping-6.4.2.jar lucene-queryparser-6.4.2.jar securesm-1.1.jar
HdrHistogram-2.1.6.jar java-version-checker-5.3.2.jar log4j-api-2.7.jar lucene-highlighter-6.4.2.jar lucene-sandbox-6.4.2.jar snakeyaml-1.15.jar
hppc-0.7.1.jar jna-4.2.2.jar log4j-core-2.7.jar lucene-join-6.4.2.jar lucene-spatial3d-6.4.2.jar spatial4j-0.6.jar
jackson-core-2.8.6.jar joda-time-2.9.5.jar lucene-analyzers-common-6.4.2.jar lucene-memory-6.4.2.jar lucene-spatial-6.4.2.jar t-digest-3.0.jar
jackson-dataformat-cbor-2.8.6.jar jopt-simple-5.0.2.jar lucene-backward-codecs-6.4.2.jar lucene-misc-6.4.2.jar lucene-spatial-extras-6.4.2.jar
jackson-dataformat-smile-2.8.6.jar jts-1.13.jar lucene-core-6.4.2.jar lucene-queries-6.4.2.jar lucene-suggest-6.4.2.jar
[root@kfos-vmelk-1 lib]#
root@kfos-vmelk-1 elasticsearch-5.4.0]# cd lib/
[root@kfos-vmelk-1 lib]# ls
elasticsearch-5.4.0.jar jackson-dataformat-yaml-2.8.6.jar log4j-1.2-api-2.8.2.jar lucene-grouping-6.5.0.jar lucene-queryparser-6.5.0.jar securesm-1.1.jar
HdrHistogram-2.1.9.jar java-version-checker-5.4.0.jar log4j-api-2.8.2.jar lucene-highlighter-6.5.0.jar lucene-sandbox-6.5.0.jar snakeyaml-1.15.jar
hppc-0.7.1.jar jna-4.4.0.jar log4j-core-2.8.2.jar lucene-join-6.5.0.jar lucene-spatial3d-6.5.0.jar spatial4j-0.6.jar
jackson-core-2.8.6.jar joda-time-2.9.5.jar lucene-analyzers-common-6.5.0.jar lucene-memory-6.5.0.jar lucene-spatial-6.5.0.jar t-digest-3.0.jar
jackson-dataformat-cbor-2.8.6.jar jopt-simple-5.0.2.jar lucene-backward-codecs-6.5.0.jar lucene-misc-6.5.0.jar lucene-spatial-extras-6.5.0.jar
jackson-dataformat-smile-2.8.6.jar jts-1.13.jar lucene-core-6.5.0.jar lucene-queries-6.5.0.jar lucene-suggest-6.5.0.jar
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Cooper went on to study an MSC in Advanced Manufacturing Systems and Kingston University.\nCooper worked as a technical consultant, sitting DBA exams and specializing in Oracle Applications. With a long experience as a programmer, Cooper is able to assess systems by breaking into programs and combing through the code. Knowledge of IT development and operations working practices helps him to focus his reviews on the attributes of software that are really important to IT professionals.\nAfter working as an IT consultant across Europe and the USA, he has become adept at explaining complicated technology in everyday terms. He is a people person with an interest in technology\n","url":"https:\/\/www.comparitech.com\/author\/"}}},{"@type":"Question","name":"How do I monitor Elasticsearch?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"You can actually use Elasticsearch to monitor Elasticsearch. This process requires you to collect status messages from your Elasticsearch instances, process them through Logstash into a series of records and then search through those records to extract and compile performance data. However, it is a lot easier to a pre-written monitoring tool to track the performance of your Elasticsearch projects.\n","author":{"@type":"Person","name":"Stephen Cooper","description":"Stephen Cooper has taken a close interest in online security since his thesis on Internet encryption in the early 90s. That formed part of his BSC (Hons) in Computing and Informatics at the University of Plymouth. In those days, encapsulation techniques were just being formulated and Cooper kept an eye on those methodologies as they evolved into the VPN industry. Cooper went on to study an MSC in Advanced Manufacturing Systems and Kingston University.\nCooper worked as a technical consultant, sitting DBA exams and specializing in Oracle Applications. With a long experience as a programmer, Cooper is able to assess systems by breaking into programs and combing through the code. Knowledge of IT development and operations working practices helps him to focus his reviews on the attributes of software that are really important to IT professionals.\nAfter working as an IT consultant across Europe and the USA, he has become adept at explaining complicated technology in everyday terms. He is a people person with an interest in technology\n","url":"https:\/\/www.comparitech.com\/author\/"}}},{"@type":"Question","name":"Is Kibana a monitoring tool?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Kibana is a data visualization tool that can display records output by an Elasticsearch engine and Logstash. So, Kibana can be a component of a monitoring system. However, the Kibana is not an out-of-the-box monitoring tool.\n","author":{"@type":"Person","name":"Stephen Cooper","description":"Stephen Cooper has taken a close interest in online security since his thesis on Internet encryption in the early 90s. That formed part of his BSC (Hons) in Computing and Informatics at the University of Plymouth. In those days, encapsulation techniques were just being formulated and Cooper kept an eye on those methodologies as they evolved into the VPN industry. Cooper went on to study an MSC in Advanced Manufacturing Systems and Kingston University.\nCooper worked as a technical consultant, sitting DBA exams and specializing in Oracle Applications. With a long experience as a programmer, Cooper is able to assess systems by breaking into programs and combing through the code. Knowledge of IT development and operations working practices helps him to focus his reviews on the attributes of software that are really important to IT professionals.\nAfter working as an IT consultant across Europe and the USA, he has become adept at explaining complicated technology in everyday terms. He is a people person with an interest in technology\n","url":"https:\/\/www.comparitech.com\/author\/"}}}]} {"@context":"http:\/\/schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.comparitech.com\/"},{"@type":"ListItem","position":2,"name":"Net Admin","item":"https:\/\/www.comparitech.com\/net-admin\/"},{"@type":"ListItem","position":3,"name":"The Best Elasticsearch Monitoring Tools","item":"https:\/\/www.comparitech.com\/net-admin\/best-elasticsearch-monitoring-tools\/"}]}Net AdminThe Best Elasticsearch Monitoring Tools We are funded by our readers and may receive a commission when you buy using links on our site. The Best Elasticsearch Monitoring Tools Elasticsearch is a very widely-used enterprise search engine that has many applications. If you use it, find out how to monitor it. Stephen Cooper @VPN_News UPDATED: November 30, 2023 body.single .section.main-content.sidebar-active .col.grid-item.sidebar.span_1_of_3 { float: right; } body.single .section.main-content.sidebar-active .col.grid-item.content.span_2_of_3 { margin-left: 0; } e24fc04721
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