svn: REPORT of '/svn/../!svn/vcc/default': Could not read chunk size: 远程主机强迫关闭

SVN更新时报错：
RA layer request failed
svn: REPORT of '/svn/aa/!svn/vcc/default': Could not read chunk size: 远程主机强迫关闭

请大侠帮忙看看是什么问题引起的，谢谢！



-----------------------------
SVN服务器所在操作系统：
win server2003 service pack2

visulsvnserver httpd.conf内容：
#
# This is configuration file for Apache HTTP server which is
# part of VisualSVN Server.
#
# DO NOT EDIT THIS FILE IT WILL BE REGENERATED AUTOMATICALLY BY VISUALSVN SERVER
#
# Contact with VisualSVN Ltd. (support@visualsvn.com) if you have suggestions and
# improvements.
#

ThreadsPerChild 64
MaxMemFree 100
MaxRequestsPerChild 0
Win32DisableAcceptEx
LimitXMLRequestBody 0
LimitRequestFieldSize 12392

ServerRoot "D:/VisualSVNServer"
ServerName "aaa"
ServerSignature Off
ServerTokens Prod
DocumentRoot "htdocs"
Timeout 6000

PidFile "D:/aa/server.pid"

Listen "443"

LoadModule auth_basic_module bin/mod_auth_basic.so
LoadModule authn_file_module bin/mod_authn_file.so
LoadModule authn_visualsvn_module bin/mod_authn_visualsvn.so
LoadModule authz_svn_module bin/mod_authz_svn.so
LoadModule alias_module bin/mod_alias.so
LoadModule dir_module bin/mod_dir.so
LoadModule mime_module bin/mod_mime.so
LoadModule setenvif_module bin/mod_setenvif.so
LoadModule rewrite_module bin/mod_rewrite.so

LoadModule dav_module bin/mod_dav.so
LoadModule dav_svn_module bin/mod_dav_svn.so
LoadModule ssl_module bin/mod_ssl.so

<Directory />
Options FollowSymLinks
AllowOverride None

RewriteEngine on
RewriteCond %{REQUEST_URI} ^/svn$
RewriteRule ^(.*/svn)$ %1/ [R=301,L]
</Directory>

<Location /svn/>
DAV svn

SVNListParentPath on
SVNParentPath "D:/aa/"
SVNIndexXSLT "/svnindex.xsl"

AuthName "Subversion Repositories"
AuthType Basic
AuthBasicProvider file
AuthUserFile "D:/aa/htpasswd"
AuthzSVNAccessFile "D:/aa/authz"

require valid-user
</Location>

Alias /web-ui-static htdocs/web-ui-static

<IfModule dir_module>
DirectoryIndex index.html
</IfModule>

ErrorLog nul

LogLevel error

TraceEnable off

DefaultType text/plain

<IfModule mime_module>
TypesConfig conf/mime.types
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz
AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crl
</IfModule>

<IfModule ssl_module>
SSLEngine on

SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
SSLPassPhraseDialog builtin
SSLSessionCache "shm:D:/aa/ssl_scache"
SSLSessionCacheTimeout 300000
SSLMutex default
SSLCertificateFile certs/server.pem
SSLCertificateKeyFile certs/server.pem
SSLProtocol -ALL +SSLv3 +TLSv1
SSLCipherSuite ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM

SetEnvIf User-Agent ".*MSIE.*" ssl-unclean-shutdown

</IfModule>

Include conf/httpd-custom.conf