Solr is an open source search engine service. The service is a part of the Hortonworks Data Platform and prior to installing it via Ambari, the service should be added (Zeppelin Notebook went through the same in HDP 2.4 – it had to be added manually before installing). Here is the link to the post about how to add Solr to the list of services.
Once the Solr service is available on the Add Services list, it can be installed. It is a simple process – click next a few times, deploy and that is it. Well, not really.
The following error message will appear
This documentation at the bottom states the following:
In the case of the Java preinstall check failing, the easiest remediation is to login to each machine that Solr will be installed on, temporarily set the JAVA_HOME
environmental variable, then then use yum/zypper/apt-get to install the package. For example on CentOS:
export JAVA_HOME=/usr/jdk64/jdk1.8.0_77 yum install lucidworks-hdpsearch
The Datanodes did not find any Java so I installed Java
sudo add-apt-repository ppa:openjdk-r/ppa && sudo apt-get update && sudo apt-get install openjdk-8-jdk -y
Added JAVA_HOME to /env/environment
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
And I installed the packages on every DataNode.
cd /etc/apt/sources.list.d sudo wget http://public-repo-1.hortonworks.com/HDP-SOLR-2.5-100/repos/ubuntu14/hdp-solr.list sudo apt-get update -y sudo apt-get install lucidworks-hdpsearch
Do not forget to do the same on client nodes and Namenode(s).
When the install is through and if all went well, the following output is given
Result on all nodes:
==== Package lucidworks-hdpsearch was installed ====
The NameNode challenge
The previous steps worked on all nodes except on NameNode! I figured out th
echo $JAVA_HOME
NameNode show the following
/usr/jdk64/jdk1.8.0_77
DataNodes and Client gives me this
/usr/lib/jvm/java-8-openjdk-amd64
So I installed Java on NameNode as described above (I did not remove any versions) and ran the following commands (same as above)
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 cd /etc/apt/sources.list.d sudo wget http://public-repo-1.hortonworks.com/HDP-SOLR-2.5-100/repos/ubuntu14/hdp-solr.list sudo apt-get update -y sudo apt-get install lucidworks-hdpsearch
Output was
==== Package lucidworks-hdpsearch was installed ====
I went to Ambari, I deleted the Solr with Install Fail status, installed it again and it was a success!
I have no explanation why (or if) the issue was in the Java version.