Eric Avdey created COUCHDB-2785:
-----------------------------------
Summary: Call to filtered _changes crashes on non-coordinator nodes
Key: COUCHDB-2785
URL: https://issues.apache.org/jira/browse/COUCHDB-2785
Project: CouchDB
Issue Type: Bug
Security Level: public (Regular issues)
Reporter: Eric Avdey
A call to {{_changes}} end-point with {{filter}} parameter crashes on
non-coordinator nodes with :
{code:title=node.log}
2015-08-24 10:21:48.051 [error] <0.16621.0>@couch_log:error:35 rexi_server
error:{case_clause,{error,einval}}
[{mochiweb_request,get,2},{couch_httpd_external,json_req_obj,3},{couch_changes,filter,3},{fabric_rpc,changes_enumerator,2},{couch_btree,stream_kv_node2,8},{couch_btree,stream_kp_node,8},{couch_btree,fold,4},{couch_db,changes_since,5}]
{code}
The root cause is that in a clustered environment the coordinator node, i.e.
the node that received HTTP request, passes its {{mochi_req}} record to the
secondary nodes. Filter parameter for {{_changes}} expects nodes to pull peer
from the request's record and that crashing on the secondary nodes since a
socket in the request is foreign for them.
The case is not reliably reproducible, because in majority of the situations
the coordinator node gets the changes response and cancels the fabric call
before remote nodes start to execute it.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
