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Posted to dev@thrift.apache.org by "Dominik Psenner (JIRA)" <ji...@apache.org> on 2012/07/23 07:13:35 UTC
[jira] [Commented] (THRIFT-1653) TThreadedSelectorServer leaks
CLOSE_WAIT sockets
[ https://issues.apache.org/jira/browse/THRIFT-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420436#comment-13420436 ]
Dominik Psenner commented on THRIFT-1653:
-----------------------------------------
Howdie
It's probably not a bug, but rather common policy. Windows|Linux keeps ports open for about a minute after they have been used for some reason that I did not understood yet. Which means that if you have thousands of short sessions that are opened/closed very frequently the connection is being disposed of in the process, but windows keeps the handle open. There is a registry entry that configures the time that a closed socket is kept open in TIME_WAIT until it is really closed so that it is reusable by someone else. See here (http://msdn.microsoft.com/en-us/library/aa560610%28v=bts.20%29.aspx) or here (http://www.speedguide.net/articles/linux-tweaking-121 the section about "net.ipv4.tcp_fin_timeout").
Cheers
> TThreadedSelectorServer leaks CLOSE_WAIT sockets
> -------------------------------------------------
>
> Key: THRIFT-1653
> URL: https://issues.apache.org/jira/browse/THRIFT-1653
> Project: Thrift
> Issue Type: Bug
> Reporter: Mikhail Bautin
>
> We are using TThreadedSelectorServer in HBase regionserver. We are observing that under high load thousands of sockets in the CLOSE_WAIT state are not being cleaned up, leading to server crash. Is it possible that the sockets are not being closed on the server side, or the process of closing sockets closed by client is being starved on the server, because normal I/O takes priority?
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