How to start Neo4j on Azure

I’m running Neo4j v4.x on an Azure VM (Linux Ubunto 16.04). Everything was running fine until my project required a resizing for more storage. This seemingly went well as I proceeded to load data, but then a glitch of unknown type caused the Neo4j server to stop. I could no longer access it from the Neo4j broweser or from python code that queries it. I’ve restarted the VM. No effect. Even redeployed the VM without effect. From Putty:

neo4j status
Neo4j is not running

I’ve tried numerous commands, but this one comes closest to trying to do something:

sudo ssh {myusername}@{vm ip} "systemctl restart neo4j V4_0.service"

It asked for my password and accepted it (rejected errors) and then gave me

Failed to restart neo4j.service: Interactive authentication required.
See system logs and ‘systemctl status neo4j.service’ for details.
Failed to restart V4_0.service: Interactive authentication required.
See system logs and ‘systemctl status V4_0.service’ for details.

I thought I’d authenicated. In debugging, i tried entering bad username or password and was immediately rejected as expected.

Another set of info generated by the command

root@neo4jVM:/etc/init.d# neo4j start

result:

Directories in use:
home: /var/lib/neo4j
config: /etc/neo4j
logs: /var/log/neo4j
plugins: /var/lib/neo4 j/plugins
import: /var/lib/neo4j/import
data: /var/lib/neo4j/data
certificates: /var/lib/neo4j/certificates
run: /var/run/neo4j Starting Neo4j.
WARNING: Max 1024 open files allowed,minimum of 40000 recommended. See the Neo4j manual. Started neo4j (pid> 71995). It is available at http://0.0.0.0:7474/ There may be a shortdelay until the server is ready. See /var/log/neo4j/neo4j.log for current status.

Despite the promising message, it never started and Http://0.0.0.0:7474 did not connect.

for clarification, I tried variations on the one command in Putty: sudo ssh [email protected] "systemctl restart neo4j" sudo ssh [email protected] "systemctl restart neo4j.service" etc.

Exploring the Neo4j log, I found this ….LifecycleManagingDatabaseService@78116659′ was successfully initialized, but failed to start.

What am I missing?

dbms.connector.bolt.listen_address=0.0.0.0:7687

dbms.default_listen_address=0.0.0.0