Replication over proxy: attachment_request_failed,premature_end

[Alexander Krauss <kr...@in.tum.de>]

Dear list,

I have set up Apache as reverse proxy for couchdb, but I have problems 
replicating. The idea of the setup is that Apache should later handle 
authentication. However, even when this is all disabled, I get the 
following failure when trying to replicate:

$ curl -X POST http://localhost:5984/_replicate \
  -d '{"source": "http://remote:80/db", "target": "db"}'

Here, apache runs on port 80, forwarding to couchdb. The error I get is:

{"error":"json_encode","reason":"{bad_term,\n 
{attachment_request_failed,premature_end,\n 
[{doc,<<\"6b3f102ef5d66e7784194f3893655c09\">>,\n             {2,\n 
          [<<180,32,59,185,5,151,66,81,254,207,95,186,136,76,142,46>>,\n 
 
<<46,33,59,145,90,146,248,153,249,243,207,78,49,178,29,8>>]},\n 
     {[{<<\"successful\">>,true},\n               {<<\"revs\">>,\n 
           [<<\"f57de4a9eb9c43fdb18dd1f97f44e24066483947\">>,\n 
         <<\"bb42338875caca819c393585f581650fbb8a0653\">>]},\n 
      {<<\"data\">>,\n                {[{<<\"timing\">>,\n 
      {[{<<\"HOL-Abstract-Hoare-Logics\">>,\n 
{[{<<\"elapsed\">>,55},\n 
{<<\"elapsed_inner\">>,<<\"30.253\">>},\n 
{<<\"threads\">>,4},\n 
{<<\"gc\">>,<<\"11.413\">>},\n 
{<<\"cpu_inner\">>,<<\"72.309\">>},\n 
{<<\"cpu\">>,82}]}}]}},\n 
{<<\"host\">>,<<\"lxlabbroy15\">>}]}},\n 
{<<\"conf\">>,<<\"Abstract-Hoare-Logics\">>}]},\n 
[{att,<<\"log\">>,<<\"text/plain\">>,1015,<<>>,2,\n 
#Fun<couch_rep_att.0.90652905>}],\n             false,[]}]}}"}

Most of the error is part of a docment in the database, but the actual 
document where this occurs seems to vary. I was unable to reproduce this 
behaviour with a smaller database (well, this one is also just a few 
MB). I already tried dumping and reloading the database contents, but 
nothing changed.

My proxy configuration is as follows and, I hope, fairly standard:

ProxyRequests Off
AllowEncodedSlashes On
ProxyPass / http://127.0.0.1:5984/ nocanon
ProxyPassReverse / http://127.0.0.1:5984/

Normal requests to couchdb and the futon interface seem to be working 
fine through the proxy.

Any ideas what the problem could be?

Thanks,
Alex