title: svn hangs during executing "svn update" or "svn checkout" command
body: <p>Linux host: After I execute "<code>svn update</code>" or "<code>svn checkout</code>", it hangs out, and nothing displayed, and the process is always in running status and not completed, nothing displayed on the screen.</p>
  
  <p>It works fine before.</p>
  
  <p>i try to use "<code>strace -f svn update .....</code>", it hangs on this step:</p>
  
  <pre><code>socket(PF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_TCP) = 3
  connect(3, {sa_family=AF_INET, sin_port=htons(3690),
  sin_addr=inet_addr("**.***.**.**")}, 16) = 0
  setsockopt(3, SOL_SOCKET, SO_KEEPALIVE, [1], 4) = 0
  read(3, "( success ( 2 2 ( ) ( edit-pipel"..., 4096) = 116
  write(3, "( 2 ( edit-pipeline svndiff1 abs"..., 154) = 154
  read(3, ^C &lt;unfinished ...&gt;
  </code></pre>
  
  <p>the svn server version on my machine:
    svn, version 1.6.11 (r934486)</p>
  
  <p>The client version is:
  TortoiseSVN 1.7.12, Build 24070 - 64 Bit , 2013/03/29 08:00:43
  Subversion 1.7.9, 
  apr 1.4.6
  apr-utils 1.3.12
  neon 0.29.6
  OpenSSL 1.0.1e 11 Feb 2013
  zlib 1.2.7</p>
  
  <p>I need to use kill command to cancel this process</p>
  
  <p>I have another svn server with the same version, it works fine.</p>
  
  <p>I found that a new process " svnserve -d -r repo/" will be generated after execute "svn update .." or "svn checkout".</p>
  
  <p>If I tried five times, there will be five processes " svnserve -d -r repo/".</p>
  
  <p><a href="https://i.stack.imgur.com/l7uo0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/l7uo0.png" alt="enter image description here"></a></p>