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https://issues.apache.org/jira/browse/HADOOP-16504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Lisheng Sun updated HADOOP-16504:
---------------------------------
    Description: 
system default backlog is 65536
{code:java}
[work@c3-hadoop-srv-talos27 ~]$ cat /proc/sys/net/ipv4/tcp_max_syn_backlog
65536
{code}

> Increase ipc.server.listen.queue.size default from 128 to 256
> -------------------------------------------------------------
>
>                 Key: HADOOP-16504
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16504
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Lisheng Sun
>            Priority: Major
>
> system default backlog is 65536
> {code:java}
> [work@c3-hadoop-srv-talos27 ~]$ cat /proc/sys/net/ipv4/tcp_max_syn_backlog
> 65536
> {code}



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