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From "Jens Alfke (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1177) function_clause error in write_streamed_attachment
Date Mon, 06 Aug 2012 18:06:03 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13429302#comment-13429302
] 

Jens Alfke commented on COUCHDB-1177:
-------------------------------------

This same exception has been reported against CouchDB 1.2 during a push from TouchDB.

Here's the TouchDB bug report: https://github.com/couchbaselabs/TouchDB-iOS/issues/133
and a pastie of the server log including the exception: http://pastebin.com/QefqXZsN
                
> function_clause error in write_streamed_attachment
> --------------------------------------------------
>
>                 Key: COUCHDB-1177
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1177
>             Project: CouchDB
>          Issue Type: Bug
>    Affects Versions: 1.0.1, 1.0.2
>            Reporter: Robert Newson
>            Assignee: Robert Newson
>            Priority: Blocker
>             Fix For: 1.0.3, 1.1, 1.2
>
>
> LenLeft can still go negative. While the guard clause prevents an earlier bug, replication
fails when it hits this issue.
> In the following case, LenLeft is -673327 which matches no clauses (we expect either
0 or > 0). Somehow we are starting with a LenLeft value lower than the number of bytes
we subsequently receive.
> {function_clause,
>                                [{couch_db,write_streamed_attachment,
>                                     [<0.13520.3>,
>                                      #Fun<couch_rep_att.0.90652905>,-673327]},
>                                 {couch_db,with_stream,3},
>                                 {couch_db,'-doc_flush_atts/2-lc$^0/1-0-',2},
>                                 {couch_db,doc_flush_atts,2},
>                                 {couch_db,'-update_docs/4-lc$^3/1-3-',2},
>                                 {couch_db,'-update_docs/4-lc$^2/1-2-',2},
>                                 {couch_db,'-update_docs/4-lc$^2/1-2-',2},
>                                 {couch_db,update_docs,4}]}}

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