News & Announcements User Community Developer Community

Welcome to the RingCentral Community

Please note the community is currently under maintenance and is read-only.

Make sure to review our Terms of Use and Community Guidelines.
  Please note the community is currently under maintenance and is read-only.
Home » Developers
SSL Handshake fails
Tags: authentication
Jan 4, 2021 at 8:49am   •   2 replies  •  0 likes
angq fasq


We seem to have a problem while authenticating. When we try to call from out Java Backend to get the access token we get the following error:

I/O error on POST request for "":Remote host closed connection during handshake; nested exception is Remote host closed connection during handshake
Caused by: Remote host closed connection during handshake

This was working until 21/12 when we last checked before holidays. Has something changed during that time period?

Thank you

2 Answers
answered on Jan 8, 2021 at 12:26am  

Hello Phong,
We are using our own code and utilizing the rest api. The problem was that the requests were sent TLSv1 (which worked until 21/12). We now use TLSv1.2 for our requests and everything works fine again.
Thank you.

answered on Jan 4, 2021 at 10:40am  

I just try with the RingCentral Java SDK to authenticate and it works well.

Do you use the RingCentral SDK or your own code? Can you try again and print out more log.


A new Community is coming to RingCentral!

Posts are currently read-only as we transition into our new platform.

We thank you for your patience
during this downtime.

Try Workflow Builder

Did you know you can easily automate tasks like responding to SMS, team messages, and more? Plus it's included with RingCentral Video and RingEX plans!

Try RingCentral Workflow Builder

Developer Platform
Integrated Apps
App Gallery
Developer support
Games and rewards

Resource center
Product Releases
App Download
RingCentral App login
Admin Portal Login
Contact Sales
© 1999-2024 RingCentral, Inc. All rights reserved. Legal Privacy Notice Site Map Contact Us