[jira] [Commented] (TS-3869) HTTP/2 Stream uses the clients window size for the servers setting

["Bryan Call (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-3869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14715630#comment-14715630 ] 

Bryan Call commented on TS-3869:
--------------------------------

In this test the server only sends back a WINDOW_UPDATE on the connection and doesn't send a WINDOW_UPDATE for the stream, since it has 9MB left.
{code}
[bcall@mac-bryan-wire ~]$ nghttp -w 24 -W 24 -v -n -d foo https://127.0.0.1/post.php
[  0.081] send DATA frame <length=16375, flags=0x00, stream_id=1>
[  0.081] send DATA frame <length=541, flags=0x00, stream_id=1>
[  0.092] recv SETTINGS frame <length=0, flags=0x01, stream_id=0>
          ; ACK
          (niv=0)
[  0.092] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=0>
          (window_size_increment=998910)
[ 25.125] recv (stream_id=1, noind=1) :status: 502
[ 25.125] recv (stream_id=1, noind=0) date: Wed, 26 Aug 2015 22:07:43 GMT
[ 25.125] recv (stream_id=1, noind=0) via: https/1.1 rav1-1-gci-pool-general-10-87-130-110.corp.yahoo.com (ApacheTrafficServer/6.0.0 [uSc s f p eC:tOc  i p sF])
{code}

> HTTP/2 Stream uses the clients window size for the servers setting
> ------------------------------------------------------------------
>
>                 Key: TS-3869
>                 URL: https://issues.apache.org/jira/browse/TS-3869
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: HTTP/2
>            Reporter: Bryan Call
>            Assignee: Bryan Call
>             Fix For: 6.0.0
>
>
> The Http2Stream class incorrectly uses the clients window size for initializing the servers window size.  In Chrome this defaults to 10MB.  Since the client client thinks it the window size is 1MB, the amount the server said it was, and the server thinks it is 10MB the client will only be able to send 1MB of data and then wait until it gets more credit.  More credit isn't given until there is 16KB left on the stream and it will never get there since 10MB - 1MB = 9MB.



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