Server sent unexpected return value (504 ) in response to MERGE request for '/xxx'

[zhiwei chen]

Hi,all!

When I commit some file(263 directories, 3016 files, and 30M), I encountered
with this error:
svn: Commit failed (details follow):
svn: Server sent unexpected return value (504 ) in response to MERGE request
for '/xxx'

message bellow are apache error logs:
[Thu Jul 20 16:45:20 2011] [error] [client 10.3.2.1] Could not MERGE
resource "*/xxx/*!svn/act/8a08e062-8a1a-455e-b839-467adb4ae971" into
"/xxx".  [409, #0]
[Thu Jul 20 16:45:20 2011] [error] [client 10.3.2.1] An error occurred while
committing the transaction.  [409, #2]
[Thu Jul 20 16:45:20 2011] [error] [client 10.3.2.1] Can't open file
'/data0/repository/xxx/db/transactions/0-1.txn/props': No such file or
directory  [409, #2]

My environmen is:

CentOS5.6 x86_64

stunnel handle https request

stunnel send request(http) to haproxy

haproxy send requests to apache
(haproxy's contime=4000,srvtime=500000,clitime=500000)

apache use mod_dav_svn.so to operate svn repository

I want to know, if MERGE really waste time? How to resolve this error?

thank you!