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https://issues.apache.org/jira/browse/COUCHDB-1163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035499#comment-13035499
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Paul Joseph Davis commented on COUCHDB-1163:
--------------------------------------------
@James
A() -> <<223,75,246,90,97,4,234,36,15,16,12,48,211,203,36,93>>.
B() -> <<38,76,157,108,36,155,162,252,155,19,223,53,203,68,127,215>>.
Unfortunately there's no real way to tell. From the example doc in
formatted_rev_tree.txt we have a doc value for A() in the branch that starts 9
edits deep (the last branch in that file) but we also have that same hash in
the larger first branch. And in the larger first branch, A() has been deleted
which is indicated by B(). A proper merge of the trees by definition would say
that A() must have been deleted somewhere which means that for all intents and
purposes it *is* deleted. In this particular case what we really want is to
rescue the body pointer from A() and introduce it as a new revision in the tree
(or alternatively, forget all about B()).
On the other hand, I could write a fixup tool that goes in and does some fancy
pants logic to try and tell if there's an issue and reports those documents
that would suddenly drop out after a compaction.
> Document returned by id, but cannot be found by rev
> ---------------------------------------------------
>
> Key: COUCHDB-1163
> URL: https://issues.apache.org/jira/browse/COUCHDB-1163
> Project: CouchDB
> Issue Type: Bug
> Components: Database Core
> Affects Versions: 1.0.1, 1.0.2
> Reporter: James Howe
> Priority: Blocker
> Fix For: 1.0.3, 1.1
>
> Attachments: COUCHDB-1163-1.1.x.patch, COUCHDB-1163.patch, Couch
> logging for jira issue, cleaned-up.txt, formatted_rev_tree.txt
>
>
> Somehow, our cluster has developed the following problem on a handful of
> documents. Will post reproduction steps if we find them. All properties have
> been redacted. All the documents this affects also have attachments, if that
> is significant. Once a document is in this situation, it causes conflict
> detection, replication and include_docs to behave incorrectly or outright
> fail.
> GET /database/4cdee83a118ea1cf3050b1d006144d46 returns
> {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "10-df4bf65a6104ea240f100c30d3cb245d",
> "foo": "bar"
> }
> GET /database/4cdee83a118ea1cf3050b1d006144d46?open_revs=all returns
> [
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "10-df4bf65a6104ea240f100c30d3cb245d",
> "foo": "bar"
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "8-eea5e36daee12acd79a127abf36f7720",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "9-2cead1e4c813a4f0d10a9bc4aa28bfda",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "7-c3b44f004660caa496804409089b53d9",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "6-52e978041bb324d19e01a2ac5a243702",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "5-761bf28c6989f0fde41bdd5732c33159",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "4-abb005cf4b2d2dd12880a33af1e7066e",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "3-233e4624e620ec1c8b66f21a051832f8",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "10-55f0cdf9dd95ed230b733a2c826c842c",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "11-264c9d6c249ba2fc9b13df35cb447fd7",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "9-2cead1e4c813a4f0d10a9bc4aa28bfda",
> _deleted: true
> }
> },
> {
> "ok": {
> "_id": "4cdee83a118ea1cf3050b1d006144d46",
> "_rev": "2-9f2df19059d9a460a12740a63a4d95e9",
> _deleted: true
> }
> }
> ]
> GET
> /database/4cdee83a118ea1cf3050b1d006144d46?rev=10-df4bf65a6104ea240f100c30d3cb245d
> returns
> {
> "error": "not_found",
> "reason": "missing"
> }
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