Can not start elasticsearch as a service in ubuntu 16.04

Question

I have recently upgraded my machine from Ubuntu 14.04 to 16.04. I am facing problem of using the elasticsearch as a service. I installed elasticsearch using:

sudo apt-get install elasticsearch

Now sudo service elasticsearch status command shows me this result:

elasticsearch.service - LSB: Starts elasticsearch
   Loaded: loaded (/etc/init.d/elasticsearch; bad; vendor preset: enabled)
   Active: active (exited) since Sat 2016-07-30 18:28:13 BDT; 1h 19min ago
     Docs: man:systemd-sysv-generator(8)
 Main PID: 7988 (code=exited, status=1/FAILURE)
   CGroup: /system.slice/elasticsearch.service

Jul 30 18:28:13 dimik elasticsearch[10266]: [warning] /etc/init.d/elasticsearch: No java runtime was found
Jul 30 18:28:13 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 18:28:46 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 18:35:30 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 19:04:36 dimik systemd[1]: Started A search engine.
Jul 30 19:07:48 dimik systemd[1]: Started A search engine.
Jul 30 19:27:01 dimik systemd[1]: Started A search engine.
Jul 30 19:27:51 dimik systemd[1]: Started A search engine.
Jul 30 19:28:54 dimik systemd[1]: Started A search engine.
Jul 30 19:29:18 dimik systemd[1]: Started LSB: Starts elasticsearch.

Although Java is installed in my machine and I can start the server using this command.

sudo /usr/share/elasticsearch/bin/elasticsearch

I am kind of stuck here. Any help will be appreciated.

Edit

After setting up JAVA_HOME for root the error:

elasticsearch.service - LSB: Starts elasticsearch
   Loaded: loaded (/etc/init.d/elasticsearch; bad; vendor preset: enabled)
   Active: active (exited) since Sat 2016-07-30 18:28:13 BDT; 3h 32min ago
     Docs: man:systemd-sysv-generator(8)
 Main PID: 7988 (code=exited, status=1/FAILURE)
   CGroup: /system.slice/elasticsearch.service

Jul 30 18:35:30 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 19:04:36 dimik systemd[1]: Started A search engine.
Jul 30 19:07:48 dimik systemd[1]: Started A search engine.
Jul 30 19:27:01 dimik systemd[1]: Started A search engine.
Jul 30 19:27:51 dimik systemd[1]: Started A search engine.
Jul 30 19:28:54 dimik systemd[1]: Started A search engine.
Jul 30 19:29:18 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 20:02:07 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 20:20:21 dimik systemd[1]: Started LSB: Starts elasticsearch.
Jul 30 21:59:21 dimik systemd[1]: Started LSB: Starts elasticsearch.

Answer 1

Have you enabled the service ?

systemctl enable elasticsearch

Answer 2

Remove unnecessary java packages using

sudo apt autoremove

Then install elasticsearch again and start it as

sudo apt install elasticsearch
service elasticsearch status

Answer 3

1. Open /etc/init.d/elasticsearch file in editor, Comment below lines

   . /usr/share/java-wrappers/java-wrappers.sh
   find_java_runtime openjdk8 oracle8 openjdk7 oracle7 openjdk6 sun6 default
   

   Set JAVA_HOME manually like so:

   export JAVA_HOME="/usr"
   

2. service elasticsearch start

Answer 4

I found the solution for this issue. The solution comes from this discussion thread- Can’t start elasticsearch with Ubuntu 16.04 on elastic's website.

It seems that to get Elasticsearch to run on 16.04 you have to set START_DAEMON to true on /etc/default/elasticsearch. It comes commented out by default, and uncommenting it makes Elasticsearch start again just fine.

Be sure to use systemctl restart instead of just start because the service is started right after installation, and apparently there's some socket/pidfile/something that systemd keeps that must be released before being able to start the service again.

Answer 5

My problem was different, I started elasticsearch manually as root user, so some files were created with wrong ownership, so elasticsearch user cannot write on them.

You can try to start elasticsearch from console to see errors:

sudo -u elasticsearch /usr/share/elasticsearch/bin/elasticsearch \
 -Des.default.config=/etc/elasticsearch/elasticsearch.yml \
 -Des.default.path.home=/usr/share/elasticsearch \
 -Des.default.path.logs=/var/log/elasticsearch \
 -Des.default.path.data=/var/lib/elasticsearch \
 -Des.default.path.work=/tmp/elasticsearch \
 -Des.default.path.conf=/etc/elasticsearch

To fix on my machine I had to do:

rm -rf /var/log/elasticsearch/*
rm -rf /var/lib/elasticsearch/*

Answer 6

The problem lies on log files, "No java runtime was found."

Jul 30 18:28:13 dimik elasticsearch[10266]: [warning] /etc/init.d/elasticsearch: No java runtime was found

Here's my solution to the problem.

1. Check elasticsearch init file

   sudo nano /etc/init.d/elasticsearch

search for

. /usr/share/java-wrappers/java-wrappers.sh
find_java_runtime openjdk8 oracle8 openjdk7 oracle7 openjdk6 sun6 default
export JAVA_HOME

2. Check java-wrappers.sh file

   sudo nano /usr/share/java-wrappers/java-wrappers.sh

Now you could see the warning comes from

#Displays a warning
java_warning() {
    echo "[warning] $0: $@" >&2;
}

3. Somehow, java directories are not listed in jvm-list.sh files

Now edit the jvm-list.sh file

sudo nano /usr/lib/java-wrappers/jvm-list.sh

Edit the line add your java directories files, in my case add /usr/lib/jvm/java-8-oracle*

__jvm_oracle8="/usr/lib/jvm/jdk-8-oracle-* /usr/lib/jvm/jre-8-oracle-* /usr/lib/jvm/java-8-oracle*"

4. Now restart the service and check elasticsearch services

   sudo systemctl restart elasticsearch
   sudo systemctl elasticsearch status
   curl -X GET "http://localhost:9200"

Hopes this would help