[
https://issues.apache.org/jira/browse/TAJO-1230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14237386#comment-14237386
]
ASF GitHub Bot commented on TAJO-1230:
--------------------------------------
GitHub user ykrips opened a pull request:
https://github.com/apache/tajo/pull/291
TAJO-1230: Disable ipv6 support on JVM
Before applying this option, it would be shown like following line.
```
tcp 0 0 127.0.0.1:26001 0.0.0.0:*
LISTEN 4494/java
tcp 0 0 127.0.0.1:26002 0.0.0.0:*
LISTEN 4494/java
tcp 0 0 127.0.0.1:26003 0.0.0.0:*
LISTEN 4494/java
tcp 0 0 127.0.0.1:26005 0.0.0.0:*
LISTEN 4494/java
tcp 0 0 0.0.0.0:26080 0.0.0.0:*
LISTEN 4494/java
tcp 0 0 :::28091 :::*
LISTEN 4692/java
tcp 0 0 :::28092 :::*
LISTEN 4692/java
tcp 0 0 :::28093 :::*
LISTEN 4692/java
tcp 0 0 :::38818 :::*
LISTEN 4595/java
tcp 0 0 ::ffff:192.168.122.18:28080 :::*
LISTEN 4692/java
```
With this disable IPv6 option, it will be disable the ipv6 capability on
servers.
```
tcp 0 0 127.0.0.1:26001 0.0.0.0:*
LISTEN 3796/java
tcp 0 0 127.0.0.1:26002 0.0.0.0:*
LISTEN 3796/java
tcp 0 0 127.0.0.1:26003 0.0.0.0:*
LISTEN 3796/java
tcp 0 0 127.0.0.1:26005 0.0.0.0:*
LISTEN 3796/java
tcp 0 0 0.0.0.0:28091 0.0.0.0:*
LISTEN 3995/java
tcp 0 0 0.0.0.0:28092 0.0.0.0:*
LISTEN 3995/java
tcp 0 0 0.0.0.0:28093 0.0.0.0:*
LISTEN 3995/java
tcp 0 0 0.0.0.0:26080 0.0.0.0:*
LISTEN 3796/java
tcp 0 0 192.168.122.185:28080 0.0.0.0:*
LISTEN 3995/java
tcp 0 0 0.0.0.0:11728 0.0.0.0:*
LISTEN 3897/java
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ykrips/tajo TAJO-1230
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tajo/pull/291.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #291
----
commit eefe43d742804db604a89ffddd2aa3f473eb5926
Author: Jihun Kang <[email protected]>
Date: 2014-12-08T02:56:21Z
TAJO-1230: Disable ipv6 support on JVM
----
> Disable ipv6 support on JVM
> ---------------------------
>
> Key: TAJO-1230
> URL: https://issues.apache.org/jira/browse/TAJO-1230
> Project: Tajo
> Issue Type: Improvement
> Reporter: Jihun Kang
> Assignee: Jihun Kang
> Priority: Minor
>
> This is not a critial issue, but each Tajo components internally use ipv4
> address. Without this option, JVM will try to load ipv6 stacks on jvm
> processes and bind itself with ipv6 addresses. It could waste JVM resources
> and could be decreased network performance. If we don't have a plan to
> support ipv6 address, it could be better to turn off ipv6 support.
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