[
https://issues.apache.org/jira/browse/NIFI-4838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16394534#comment-16394534
]
ASF GitHub Bot commented on NIFI-4838:
--------------------------------------
Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/2448
@pvillard31 I found that a catch block was suppressing a critical problem
with how I was handling the input flowfile. When I'd call `session.commit()`
after a block of results were written to a flowfile, it would throw an
exception because the input flowfile had not been transferred yet.
So what I am going to do is redo this to make it configurable again. With
the default behavior being only one single commit. Then users can choose a
"streaming mode" where at the the first sign of success it transfers the input
flowfile to REL_ORIGINAL. Then if an error happens, it would write a new
flowfile with the same attributes and content as the original and send that
cloned copy to the failure relationship. It may not be perfect, but I don't
think NiFi has a way to do a partial commit which is what I'd need to make it
work as-is.
> Make GetMongo support multiple commits and give some progress indication
> ------------------------------------------------------------------------
>
> Key: NIFI-4838
> URL: https://issues.apache.org/jira/browse/NIFI-4838
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Mike Thomsen
> Assignee: Mike Thomsen
> Priority: Major
>
> It shouldn't wait until the end to do a commit() call because the effect is
> that GetMongo looks like it has hung to a user who is pulling a very large
> data set.
> It should also have an option for running a count query to get the current
> approximate count of documents that would match the query and append an
> attribute that indicates where a flowfile stands in the total result count.
> Ex:
> query.progress.point.start = 2500
> query.progress.point.end = 5000
> query.count.estimate = 17,568,231
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
