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Posted to common-issues@hadoop.apache.org by "Luca Toscano (Jira)" <ji...@apache.org> on 2020/03/26 15:17:00 UTC

[jira] [Created] (HADOOP-16943) Allow IPv6 in hadoop_config.sh

Luca Toscano created HADOOP-16943:
-------------------------------------

             Summary: Allow IPv6 in hadoop_config.sh
                 Key: HADOOP-16943
                 URL: https://issues.apache.org/jira/browse/HADOOP-16943
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Luca Toscano


Hi!

I am currently using CDH 5.x and moving to BigTop 1.4 / 1.5 (so jumping from 2.6 to 2.8.5/2.10) but the following bit of hadoop_config.sh is always there:
# Disable ipv6 as it can cause issues
HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"
Is there any reason to keep it? I tried to override it via daemon-specific environment variables, but in other daemons like Hive is not that easy (see [https://phabricator.wikimedia.org/T240255#5728881] for an example). 

IPv6 should be safe to use (IIRC hdfs was the main concern at the time but it was fixed HADOOP-11890).

Thanks in advance,

Luca

 

 



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