Archy Gu created ZEPPELIN-4743:
----------------------------------
Summary: MongoNotebookRepo get unstable note path in zeppelin
0.9.0-preview1
Key: ZEPPELIN-4743
URL: https://issues.apache.org/jira/browse/ZEPPELIN-4743
Project: Zeppelin
Issue Type: Bug
Components: NotebookRepo
Affects Versions: 0.9.0
Environment: zeppelin-0.9.0-preview1
mongodb 3.4.23
Ubuntu 18.04
Reporter: Archy Gu
Attachments: test.gif
In 0.9.0, when using MongoNotebookRepo, zeppelin store note paths in folder
collection and get note paths by aggregation $graphLookup.
However, when I create notes in multi-layer folders, and then restart zeppelin
or call /api/notebook-repositories/reload, the path of note is unstable.
The order of documents returned by $graphLookup leads to this problem. I
investigate $graphLookup through mongodb
manual([https://docs.mongodb.com/v3.4/reference/operator/aggregation/graphLookup/]).The
reference indicates that *documents returned in the as field are not
guaranteed to be in any order.* Then I view the source of MongoNotebookRepo,
and I found that zeppelin builds the note path without sorting the documenent
returned in as field of $graphLookup. I'll be happy to submit a PR to fix this
if you like.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
