java -version

sinon,
sudo apt-get update
sudo apt-get install default-jre
sudo apt-get install default-jdk

sudo tar xzf solr-6.6.6.tgz solr-6.6.6/bin/install_solr_service.sh --strip-components=2
sudo bash ./install_solr_service.sh solr-6.6.6.tgz

# Make sure to replace the /opt/solr/ path with where you have placed Solr
cd /opt/solr
sudo mkdir -p server/ez/template
sudo cp -R /var/www/project/vendor/ezsystems/ezplatform-solr-search-engine/lib/Resources/config/solr/* server/ez/template
sudo cp server/solr/configsets/basic_configs/conf/{currency.xml,solrconfig.xml,stopwords.txt,synonyms.txt,elevate.xml} server/ez/template
sudo cp server/solr/solr.xml server/ez

# Modify solrconfig.xml to remove the section that doesn't agree with your schema
sudo sed -i.bak '/<updateRequestProcessorChain name="add-unknown-fields-to-the-schema">/,/<\/updateRequestProcessorChain>/d' server/ez/template/solrconfig.xml
 
(no root at this point)


# Start Solr (but apply autocommit settings below first if you need to)
sudo service solr stop
sudo mkdir  /opt/solr/server/logs
sudo chmod -R 777 /opt/solr/server/logs
sudo chmod -R 777 /opt/solr/server/ez

sudo chown -R solr:solr /opt/solr-6.6.6

cd /opt/solr
bin/solr -s ez
bin/solr create_core -c collection1 -d server/ez/template
kill the process
sudo service solr start

sudo php composer.phar require --no-update ezsystems/ezplatform-solr-search-engine:~2.0
sudo php composer.phar update

change app/config/parameters.yml
update collection1

cd /var/www/project && php bin/console --env=prod ezplatform:reindex > /var/www/project/var/logs/cron_reindex.log
sudo sh clear_cache.sh

vi /opt/solr/server/ez/template/solrconfig.xml

<!--solrconfig.xml-->
<autoCommit>
  <!-- autoCommit is here left as-is like it is out of the box in Solr, this controls hard commits for durability/replication -->
  <maxTime>${solr.autoCommit.maxTime:15000}</maxTime>
  <openSearcher>false</openSearcher>
</autoCommit>

<autoSoftCommit>
  <!-- Soft commits controls mainly when changes becomes visible, by default we change value from -1 (disabled) to 20ms, so Solr gets to bulk update changes a bit, but before a request typically finishes -->
  <maxTime>${solr.autoSoftCommit.maxTime:20}</maxTime>
</autoSoftCommit>