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Re: Checkout/Update issues with Subversion 1.8 server and client via HTTP

From: Johan Corveleyn <jcorvel_at_gmail.com>
Date: Thu, 14 May 2015 19:47:57 +0200

On Wed, May 13, 2015 at 9:00 PM, Clay Porter <clay.porter_at_gmail.com> wrote:
> Hello,
>
> Everything is working now (see inline below). I can't thank you enough
> for your help with this.
>
> On Tue, May 12, 2015 at 5:21 PM, Andreas Stieger <andreas.stieger_at_gmx.de> wrote:
>> Hello,
>>
>> On 12/05/15 18:27, Clay Porter wrote:
>>> svn: E175002: GET request failed: 400 Bad request
>>> There is no corresponding error in the Apache HTTP logs.
>>>
>>> svn: E200014: Checksum mismatch for <file>
>>> expected: 4b4ef9e3432aa84aed190457b68c01ad
>>> actual: 863b9f52f352a5cb20298ef0eecb9e97
>>> In this case the server logs have this:
>>> [Tue May 12 12:13:05 2015] [error] [client 153.65.184.225] Unable to
>>> deliver content. [500, #0]
>>> [Tue May 12 12:13:05 2015] [error] [client 153.65.184.225] Could not
>>> write data to filter. [500, #175002]
>>
>> Does setting/changing SVNAllowBulkUpdates make any difference?
>> https://subversion.apache.org/docs/release-notes/1.8.html#serf-skelta-default
>
> Setting SVNAllowBulkUpdates to Prefer has fixed the problem for me.
> I checked the behavior using SVN clients 1.5 through 1.8 on various
> platforms and all worked.

I'm glad you got it fixed. However, it's not normal that serf's skelta
mode (the default for 1.8 clients, unless they get instructed by the
server with "SVNAllowBulkUpdates Prefer") doesn't work. If you have
the time it might be interesting to investigate this a little bit
further.

You should be able to reproduce the issue again, even when your server
is configured with "SVNAllowBulkUpdates Prefer", by using a client
with http-bulk-updates=no in its "servers" configuration file (see the
release notes snippet that Andreas pointed to). This will instruct
your client to never use bulk-updates mode (i.e. force skelta mode),
even though the server prefers it.

Some possible reasons for the error you were seeing include problems
with proxies or firewalls between client and server. Or other
components that interfere with the network communication, rewriting
packets or things like that (e.g. antivirus components, surf shield
stuff, ...). Skelta mode uses a lot more small requests/responses
(instead of one huge "update response" for the bulk-updates mode), so
maybe some security component on your network considers this an
insecure pattern, and decides to drop things ...

-- 
Johan
Received on 2015-05-14 19:49:12 CEST

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