Luca Toscano created HADOOP-16943:
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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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