StackOverflow2013

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plurals

PO
primarykey
Id
13618929
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-11-29T04:38:59.247
FavoriteCount
0
LastActivityDate
2012-11-29T04:38:59.247
LastEditDate
LastEditorUserId
0
OwnerUserId
205898
ParentId
13466639
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
This behavior is by design. When the client has closed its half on the connection and the server acknowledges the close, the client is in the FIN_WAIT_2 state, waiting for the server to close the connection. <a href="http://support.microsoft.com/kb/923200" rel="nofollow">http://support.microsoft.com/kb/923200</a> states that there is a FIN_WAIT_2 timeout of 2 minutes. If no data is received in a 2 minute period when a connection is in the FIN_WAIT_2 state, the client forcibly closes the connection (with a RST). <blockquote> By default in Windows Server 2003, TCP connections must close after the TCP connection state has been set to FIN_WAIT_2 for two minutes. </blockquote> <a href="http://httpd.apache.org/docs/2.0/misc/fin_wait_2.html" rel="nofollow">This old Apache article</a> suggests the reason for the timeout: malicious or misbehaving applications could keep the other end of the connection in FIN_WAIT_2 indefinitely by never closing their end of the connection and thus tie up operating system resources. <a href="http://manpages.ubuntu.com/manpages/precise/man7/tcp.7.html" rel="nofollow">Linux apparently has a timeout as well</a> You can check the value with $ cat /proc/sys/net/ipv4/tcp_fin_timeout I'm not sure why the timeout wasn't occurring for me on Linux. Perhaps because it was a loopback connection and therefore DoS attacks are not a concern or loopback connections use different code that does not use the tcp_fin_timeout setting? Bottom line: The operating system has a good reason for making the connection time out. Avoid using Shutdown as an application-layer signalling mechanism and use an actual application-layer method instead.
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POWhy is Socket.Receive timing out on a half-closed connection when timeout is set to infinite?
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USGreg Najda
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POWhy is Socket.Receive timing out on a half-closed connection when timeout is set to infinite?
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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