"Synchronizer can't connect to server" & "app.ERROR: WebSocket write error"

1. Application related information:
Application Type: OroCRM
Application Version: 2.1
Application Edition: Community

2. Environment related information:
OS, name and version: Ubuntu 16.04
Web server, name and version: Apache 2.4.18-2ubuntu3.4
Database, name and version: MySQL 5.7.19-0ubuntu0.16.04.1
PHP, version: PHP 1:7.0+35ubuntu6

Got Orocrm up and running but I seem to be having some issues with the Websocket feature.

My parameters.yml file:

root@localhost:~# cat /usr/share/orocrm/app/config/parameters.yml
parameters:
database_driver: pdo_mysql
database_host: 127.0.0.1
database_port: null
database_name: xxxx
database_user: xxxx
database_password: xxxx
database_drop: full
mailer_transport: mail
mailer_host: null
mailer_port: null
mailer_encryption: null
mailer_user: null
mailer_password: null
websocket_bind_address: 0.0.0.0
websocket_bind_port: 8080
websocket_frontend_host: ‘*’
websocket_frontend_port: 8080
websocket_backend_host: ‘*’
websocket_backend_port: 8080
web_backend_prefix: ”
session_handler: session.handler.native_file
locale: en
secret: xxxxxxxx
installed: ‘2017-08-09T16:01:54+08:00’
assets_version: 1258344f
assets_version_strategy: time_hash
message_queue_transport: dbal
message_queue_transport_config: null

I can see that the clank process is running:

root@localhost:~# ps auxf | grep clank
www-data 21071 0.0 2.2 367032 89244 ? S 07:24 0:00 \_ php /usr/share/orocrm/app/console clank:server –env=prod

I can see that a process is listening on :8080

root@localhost:~# netstat -an | grep :8080
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN

I am able to hit port 8080 locally and remotely:

Starting Nmap 7.40 ( https://nmap.org ) at 2017-08-10 15:41 CST
Nmap scan report for orocrm.xxxxxx.com (111.222.333.444)
Host is up (0.066s latency).
rDNS record for 111.222.333.444: orocrm.xxxxxx.com
PORT STATE SERVICE
8080/tcp open http-proxy

Nmap done: 1 IP address (1 host up) scanned in 0.16 seconds

In spite of all this, I get an alert in the browser saying “Synchronizer can’t connect to server. Please contact your Administrator.”

Additionally, though I’m not sure if its related, in app/logs/prod.log, I frequently get the error “app.ERROR: WebSocket write error”.

Any help would be appreciated. Thanks!

Topic

[travnewmaticParticipant]

I do get an error in the Firefox Developer Edition console:

Firefox can’t establish a connection to the server at wss://orocrm.xxxxxx.com:8080/.

[travnewmaticParticipant]

I’ve discovered that I DO NOT get the browser error when I view the Orocrm dashboard via http (as opposed to https).

Additionally I can see with netstat that I have established a connection via the Websocket:

root@localhost:~# netstat -an | grep :8080
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
tcp 0 0 x.x.x.x:8080 y.y.y.y:25834 ESTABLISHED

DO still get the “app.ERROR: WebSocket write error” in the app/logs/prod.log.

[travnewmaticParticipant]

Do I have to use some sort of a reverse proxy to get both https and the websocket connection to work?

[adriwan_kenobyParticipant]

I have the same problem on latest orocommerce install :

Firefox can’t establish a connection to the server at wss://orocrm.xxxxxx.com:8080/

Hos to configure apache to avoid this error ?

[Dmitriy PasechnikParticipant]

Hi

Unfortunately, direct backend WebSocket SSL/WSS connections are not supported. You have to use reverse proxy to achieve this

See
https://github.com/oroinc/platform/tree/master/src/Oro/Bundle/SyncBundle#configuration-of-secure-sslwss-connection
for details

[Author]

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