title: Elasticsearch and Cassandra does not appear in the java process table
body: <p>I am trying to setup janusgraph (latest version) with cassandra(3.11.5) and elastic seaarch(7.5.2) in Google compute engine using docker. When I run docker ps -a, all the containers are up and running. But when I am trying to update the schema I am facing the following errors:</p>
  
  <pre><code>gremlin-groovy is not an available GremlinScriptEngine
  org.apache.tinkerpop.gremlin.jsr223.console.RemoteException: gremlin-groovy is not an available GremlinScriptEngine
          at org.apache.tinkerpop.gremlin.console.jsr223.DriverRemoteAcceptor.submit(DriverRemoteAcceptor.java:184)
          at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234)
  </code></pre>
  
  <p>When I researched on the above error I found that if the Elastic search is not working there might be a chance of throwing this error. So I checked the status of the janusgraph by running the command <strong>bin/janusgraph.sh</strong> then I got following two errors</p>
  
  <pre><code>Gremlin-Server (org.apache.tinkerpop.gremlin.server.GremlinServer) is running with pid 31
  Elasticsearch (org.elasticsearch.bootstrap.Elasticsearch) does not appear in the java process table
  Cassandra (org.apache.cassandra.service.CassandraDaemon) does not appear in the java process table
  </code></pre>
  
  <p>Gremlin-Server is working fine but Elasticsearch and cassandra are not working. I found various articles regarding the above issue but none of them worked for me.</p>
  
  <p>Here is my docker-compose.yml file:</p>
  
  <pre><code>version: "3"
  
  services:
    janusgraph:
      image: janusgraph/janusgraph:latest
      container_name: jce-janusgraph
      environment:
        JANUS_PROPS_TEMPLATE: cassandra-es
        janusgraph.storage.backend: cql
        janusgraph.storage.hostname: jce-cassandra
        janusgraph.index.search.hostname: jce-elastic
      volumes:
       - /mnt/anyadvicevol/janus/scripts:/opt/janusgraph/tmp/scripts
          #      - /mnt/anyadvicevol/janus/conf/gremlin-server.yaml:/opt/janusgraph/conf/gremlin-server/gremlin-server.yaml
          #      - /mnt/anyadvicevol/janus/conf/janusgraph-cassandra-es-server.properties:/opt/janusgraph/conf/gremlin-server/janusgraph-cassandra-es-server.properties
          #      - /mnt/anyadvicevol/janus/tconf/janusgraph-cql-es-server.properties:/opt/janusgraph/conf/gremlin-server/janusgraph-cql-es-server.properties
          #      - /mnt/anyadvicevol/janus/tconf/janusgraph.sh:/opt/janusgraph/bin/janusgraph.sh
          #      - /mnt/anyadvicevol/janus/tconf/gremlin-server.sh:/opt/janusgraph/bin/gremlin-server.sh
      ports:
        - "8182:8182"
      networks:
        - jce-network
      healthcheck:
        test: ["CMD", "bin/gremlin.sh", "-e", "scripts/remote-connect.groovy"]
        interval: 10s
        timeout: 30s
        retries: 3
      entrypoint:
        - bin/gremlin-server.sh
        - conf/gremlin-server/gremlin-server.yaml
    cassandra:
      image: cassandra:3.11.5
      container_name: jce-cassandra
      volumes:
        - /mnt/anyadvicevol/cassandra:/var/lib/cassandra
      ports:
        - "7000:7000"
        - "9042:9042"
        - "9160:9160"
      networks:
        - jce-network
    elasticsearch:
      image: docker.elastic.co/elasticsearch/elasticsearch:7.5.2
      container_name: jce-elastic
      environment:
        - "ES_JAVA_OPTS=-Xms108m -Xmx108m"
        - "http.host=0.0.0.0"
        - "network.host=0.0.0.0"
        - "transport.host=127.0.0.1"
        - "cluster.name=docker-cluster"
        - "xpack.security.enabled=false"
        - "discovery.zen.minimum_master_nodes=1"
      volumes:
        - /mnt/anyadvicevol/elas/data:/usr/share/elasticsearch/data
      ports:
        - "9200:9200"
        - "9300:9300"
          #    command: ['chown', '-R', '1000:1000', '/usr/share/elasticsearch/data']        
      networks:
        - jce-network
  
  networks:
    jce-network:
  </code></pre>
  
  <p>You can see the commented lines for <strong>janusgraph</strong> volumes, I commented because those files are mounting as folders instead of files.</p>
  
  <p>Is there any way to solve the above issues. Thanks in advance</p>