It is fixed in 3.11.2 https://issues.apache.org/jira/browse/CASSANDRA-13916



On Thu, 11 Oct 2018 at 02:10 prachirath72 <prachirath72@gmail.com> wrote:
Thanks Jonathan,
Is there a ticket/bugid to remove this openjdk WARN.
Want to have a look .


-------- Original message --------
From: Jonathan Haddad <jon@jonhaddad.com>
Date: 10/10/18 10:46 AM (GMT-05:00)
To: user@cassandra.apache.org
Subject: Re: openjdk for cassandra production cluster

The warning should be removed (if it hasn’t already), it’s unnecessary at this point 

On Wed, Oct 10, 2018 at 7:41 AM Prachi Rath <prachirath72@gmail.com> wrote:
HI users,
I have created a cassandra cluster with openjdk 1.8.0_181 version.(cassandra 2.1.17)
started each node, cluster looks healthy,but in  the log files saw the WARN
message below:

WARN [main] 2014-01-28 06:02:17,861 CassandraDaemon.java (line 155) OpenJDK
is not recommended. Please upgrade to the newest Oracle Java release

Is this message  WARN informational only or can it be real issue? 
Did any one noticed something like this (Or using openjdk for production environment)

Thanks ,
Prachi
--
Jon Haddad
http://www.rustyrazorblade.com
twitter: rustyrazorblade