ElastiSearch node



Install Java

sudo apt-get install openjdk-8-jre 

Install libsodium

The Sodium crypto library (libsodium) is a modern, easy-to-use software library for encryption, decryption, signatures, password hashing and more.

  • Get libsodium (version 1.0.14 or newer)
wget -kL https://github.com/jedisct1/libsodium/releases/download/1.0.14/libsodium-1.0.14.tar.gz
tar -xvf libsodium-1.0.14.tar.gz
  • Installation:
cd libsodium-1.0.14
sudo apt-get install build-essential
sudo ./configure
sudo make && sudo make check
sudo make install        

Install bundle (ElasticSearch + Duniter4j)

unzip duniter4j-es-X.Y-standalone.zip
cd duniter4j-es-X.Y/config
  • Edit the configuration file config/elasticsearch.yml, in particular this properties:
# Your ES cluster name
cluster.name: duniter4j-elasticsearch

# Use a descriptive name for the node:
node.name: ES-NODE-1

# Set the bind address to a specific IP (IPv4 or IPv6):

# Set a custom port for HTTP:
http.port: 9203

# Duniter node to connect with
duniter.host: g1-test.duniter.org
duniter.port: 10900

# Initial list of hosts to perform synchronization
duniter.p2p.includes.endpoints: [
   "ES_CORE_API g1-test.data.duniter.fr 443",
   "ES_USER_API g1-test.data.duniter.fr 443",
   "ES_SUBSCRIPTION_API g1-test.data.duniter.fr 443"

  • Launch the node
cd duniter4j-es-X.Y/bin

Output example (on G1-test currency):

$ ./elasticsearch
[2016-09-24 00:16:45,803][INFO ][node                     ] [ES-NODE-1] version[2.3.3], pid[15365], build[218bdf1/2016-05-17T15:40:04Z]
[2016-09-24 00:16:45,804][INFO ][node                     ] [ES-NODE-1] initializing ...
[2016-09-24 00:16:46,257][INFO ][plugins                  ] [ES-NODE-1] modules [reindex, lang-expression, lang-groovy], plugins [mapper-attachments, duniter4j-elasticsearch], sites [duniter4j-elasticsearch]
[2016-09-24 00:16:46,270][INFO ][env                      ] [ES-NODE-1] using [1] data paths, mounts [[/home (/dev/mapper/isw_defjaaicfj_Volume1p1)]], net usable_space [1tb], net total_space [1.7tb], spins? [possibly], types [ext4]
[2016-09-24 00:16:46,270][INFO ][env                      ] [ES-NODE-1] heap size [989.8mb], compressed ordinary object pointers [true]
[2016-09-24 00:16:47,757][INFO ][node                     ] [ES-NODE-1] initialized
[2016-09-24 00:16:47,757][INFO ][node                     ] [ES-NODE-1] starting ...
[2016-09-24 00:16:47,920][INFO ][transport                ] [ES-NODE-1] publish_address {}, bound_addresses {}
[2016-09-24 00:16:47,924][INFO ][discovery                ] [ES-NODE-1] duniter4j-elasticsearch/jdzzh_jUTbuN26Enl-9whQ
[2016-09-24 00:16:50,982][INFO ][cluster.service          ] [ES-NODE-1] detected_master {EIS-DEV}{FD0IzkxETM6tyOqzrKuVYw}{}{}, added {{EIS-DEV}{FD0IzkxETM6tyOqzrKuVYw}{}{},}, reason: zen-disco-receive(from master [{EIS-DEV}{FD0IzkxETM6tyOqzrKuVYw}{}{}])
[2016-09-24 00:16:53,570][INFO ][http                     ] [ES-NODE-1] publish_address {}, bound_addresses {}
[2016-09-24 00:16:53,570][INFO ][node                     ] [ES-NODE-1] started
[2016-09-24 00:16:57,850][INFO ][node                     ] Checking Duniter indices...
[2016-09-24 00:16:57,859][INFO ][node                     ] Checking Duniter indices... [OK]
[2016-09-24 00:17:08,026][INFO ][duniter.blockchain       ] [g1-test] [g1-test.duniter.org:10900] Indexing last blocks...
[2016-09-24 00:17:08,026][INFO ][duniter.blockchain       ] [g1-test] [g1-test.duniter.org:10900] Indexing block #999 / 41282 (2%)...
[2016-09-24 00:17:08,045][INFO ][duniter.blockchain       ] [g1-test] [g1-test.duniter.org:10900] Indexing block #1998 / 41282 (4%)...
[2016-09-24 00:17:09,026][INFO ][duniter.blockchain       ] [g1-test] [g1-test.duniter.org:10900] Indexing block #2997 / 41282 (6%)...
[2016-09-24 00:17:10,057][INFO ][duniter.blockchain       ] [g1-test] [g1-test.duniter.org:10900] Indexing block #3996 / 41282 (8%)...
[2016-09-24 00:17:11,026][INFO ][duniter.blockchain       ] [g1-gtest] [g1-test.duniter.org:10900] Indexing block #41282 - hash [00000AAD73B0E76B870E6779CD7ACCCE175802D7867C13B5C8ED077F380548C5]

Test your node

Using a web browser

The following web address should works: http://localhost:9200/node/summary

Using Cesium

You should also be able to use your node in the Cesium application:

  • in the Cesium+ settings, replace the data node address;
  • check if graph and profil avatar are display correctly.

Request the ES node

When a blockchain currency has been indexed, you can test some fun queries :

curl -XGET 'http://localhost:9200/gtest/block/_search' -d '{
"query": {
        "filtered" : {
            "filter": {
                "exists" : { "field" : "dividend" }
    "_source": ["number", "dividend", "hash", "membersCount"]

More documentation here :


Could not find an implementation class.


java.lang.RuntimeException: java.lang.RuntimeException: Could not find an implementation class.
        at org.duniter.core.util.websocket.WebsocketClientEndpoint.<init>(WebsocketClientEndpoint.java:56)
        at org.duniter.core.client.service.bma.BlockchainRemoteServiceImpl.addNewBlockListener(BlockchainRemoteServiceImpl.java:545)
        at org.duniter.elasticsearch.service.BlockchainService.listenAndIndexNewBlock(BlockchainService.java:106)


Plugin use Websocket to get notification from a Duniter nodes. The current library (Tyrus) is loaded throw java Service Loader, that need access to file META-INF/services/javax.websocket.ContainerProvider contains by Tyrus. ElasticSearch use separated classloader, for each plugin, that disable access to META-INF resource.

Solution :

Move Tyrus libraries into elasticsearch lib/ directory :

cd <ES_HOME>
mv plugins/duniter4j-elasticsearch/tyrus-*.jar lib
mv plugins/duniter4j-elasticsearch/javax.websocket-api-*.jar lib