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https://issues.apache.org/jira/browse/HADOOP-19695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023091#comment-18023091
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ASF GitHub Bot commented on HADOOP-19695:
-----------------------------------------
ferdelyi commented on PR #7979:
URL: https://github.com/apache/hadoop/pull/7979#issuecomment-3338485084
In the patch-shadedclient.txt the exception now is:
Caused by: java.lang.IllegalStateException: Insufficient configured threads:
required=5 < max=5 for
QueuedThreadPool[qtp164052991]@9c73fff{STARTED,5<=5<=5,i=3,r=-1,q=0}[ReservedThreadExecutor@29be997f{reserved=0/1,pending=0}]
I've increased HTTP_MAX_THREADS by one, and the required number of threads
also increased by one. Just out of curiosity will puch e.g. 10 and see if it
keeps increasing.
> Add dual-stack/IPv6 Support to HttpServer2
> ------------------------------------------
>
> Key: HADOOP-19695
> URL: https://issues.apache.org/jira/browse/HADOOP-19695
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: hadoop-common
> Reporter: Ferenc Erdelyi
> Assignee: Ferenc Erdelyi
> Priority: Minor
> Labels: pull-request-available
>
> To support clients connecting to JHS via IPv6, we need to equip the YARN
> WebApp class to bind to an IPv6 address. WebApp uses the HttpServer2, and
> adding the IPv6 connector to this class makes the solution more elegant.
> To enable dual-stack or IPv6 support, use InetAddress.getAllByName(hostname)
> to resolve the IP addresses of a host.
> When the system property java.net.preferIPv4Stack is set to true, only IPv4
> addresses are returned, and any IPv6 addresses are ignored, so no extra check
> is needed to exclude IPv6.
> When java.net.preferIPv4Stack is false, both IPv4 and IPv6 addresses may be
> returned, and any IPv6 addresses will also be added as connectors.
> To disable IPv4, you need to configure the OS at the system level.
>
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