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From "Filipe Manana (JIRA)" <j...@apache.org>
Subject [jira] Created: (COUCHDB-793) replication hangs (recent @dev thread)
Date Thu, 10 Jun 2010 18:18:16 GMT
replication hangs (recent @dev thread)
--------------------------------------

                 Key: COUCHDB-793
                 URL: https://issues.apache.org/jira/browse/COUCHDB-793
             Project: CouchDB
          Issue Type: Bug
          Components: Replication
    Affects Versions: 0.11
         Environment: trunk and 0.11 partially
            Reporter: Filipe Manana


Following the recent @dev thread about the replication.js test hanging, the following patch
fixes 2 causes for this:

1) In couch_rep_reader, if the reader_loop process finishes before all monitored processes
(which read docs from source db) finish, the couch_db_writer process will never receive the
message {complete, HighSeq}. This happens more frequently for replication by doc_ids

2) For trunk only, in couch_rep_writer, if we replicate a document with attachments and the
first couch_rep_httpc upload (remote target db case) try doesn't succeed, subsequent tries
will always fail because the couch_work_queue used was closed after the first try and the
streaming function passed to ibrowse will always returns eof.

The following patch fixes both problems. With it, running the replication test several times
in a row (20+) succeeds, as well as all other JS and Etap tests.

Reason 1) might be the cause for COUCHDB-596 as well.

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