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From "Rutherford, Tim - Exelis" <>
Subject HTTPS Reverse Proxy Replication
Date Tue, 16 Jun 2015 16:46:19 GMT
I have been struggling for a while now to get couchdb continuous replication to work with a
remote database behind an https reverse proxy. I'm not sure if I am missing something, but
as far as I can tell, it should work and just isn't.

My setup has a windows machine running couchdb (version 1.5.1) on the default port 5984 and
a remote couchdb (version 1.5.1) behind apache httpd using HTTPS.

Apache httpd is configured with: ProxyPass /futon http://localhost:5984

I added a replication document to _replicator that looks like this:
   "source": {
       "url": "https://[remote ip]/futon/iss-local<https://[remote%20ip]/futon/iss-local>",
       "headers": {
           "Authorization": "Basic [valid base64 user:pass]"
   "target": "iss-remote",
   "create_target": true,
   "continuous": true,
   "user_ctx": {
        "roles": ["_admin"]

The replication document is successfully added and replication_state is set to triggered.
The status page shows the Replication task and the status column shows "Checkpointed source
sequence 0, current source sequence 20416, progress 0%".

It never progresses from there. iss-remote is created successfully, but no documents are added.
Checking CouchDB's log file shows a series of error messages like this:
[Thu, 28 May 2015 22:04:46 GMT] [error] [<0.22546.4>] Replicator, request GET to "https://[remote
failed due to error timeout
[Thu, 28 May 2015 22:04:46 GMT] [info] [<0.22544.4>] Retrying GET to https://[remote
in 1.0 seconds due to error timeout

Couch then waits a bit and tries again and I get the same error message.

Which doesn't make sense to me because that URL works correctly using multiple tools (web
browser, curl, and even using an httpc:request() in erlang) from the same machine.

If I expose port 80 on the remote server and use http instead everything works as expected.
Documents are replicated and progress goes up to 100%.

As far as I can tell, this is an issue with couchdb when talking to the reverse proxy. I tried
exposing couchdb's https port 6984 using the same certificate and it worked fine.

I have installed a new version of apache and only configured the proxypass and ssl and I still
get the same issue.

I ran wireshark (with ssl decryption using the certificate from the server) on the machine
that I am replicating to and I don't see any issues. I see the GET request from the error
log and a corresponding 200 response with data. A little while later, the error message shows
up in the log.

Has anyone seen this before? Is there anything I can do to fix it?

Thank you,
Tim Rutherford


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