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From <>
Subject RE: Next release due
Date Tue, 24 Mar 2020 09:15:41 GMT
Hi Shad,

Let me get familiar with the codebase and the set up the build/test
environments I can take a look at these issues in the next week.

Ill come back to you if I have any specific questions regarding build/test.

Bye for now,

-----Original Message-----
From: Shad Storhaug <> 
Sent: Sunday, March 22, 2020 7:44 PM
Subject: RE: Next release due

Hi Michael,

To help us close some small issues, doing a search through the entire
solution to see TODO items specific to Lucene.NET using a "Edit > Find and
Replace > Find in files" in Visual Studio can be done to find issues that
are still open (many of which are not in JIRA). To find them, search for the
string "LUCENENET TODO|LUCENE TO-DO" using the Regex option.

To be more specific, here are a couple of examples:

1. Replace all private/internal nested IComparer<T> implementations (usually
including the word "Anonymous" in the name) with the Comparer.Create()
method (see: This will eliminate a
lot of unnecessary classes and make the code correspond to Java better,
which uses anonymous classes to achieve similar code inlining. If you are
unsure if one needs to be converted to inline code rather than a concrete
class, check the Java implementation to see if it is inline

2. Change overloads of OpenStringBuilder.Append(charsequence, start, end) to
OpenStringBuilder.Append(charsequence, startIndex, charCount) to match the
conventions in .NET
). In Java, the convention is to use start index and end index to select
text in a string, but in .NET, the corresponding convention is to use start
index and length (count).

Once you make the changes and have tested them thoroughly, just open a pull
request on GitHub for review:

There are several other ways to help including answering questions on our
user mailing list and on StackOverflow, blogging about Lucene.NET, and
helping us to find bugs and bottlenecks. See
o-help for some inspiration. However, closing remaining issues in JIRA and
in ICU4N are what will move us closer to release.

Shad Storhaug
Project Chairperson - Apache Lucene.NET

-----Original Message-----
From: Michael Condillac <> 
Sent: Sunday, March 22, 2020 4:50 PM
Subject: RE: Next release due

Hi Shad,

Sounds like good progress has been made up to now. I do have some additional
capacity right now so perhaps I can be of some help. I did pull the source
code already but perhaps you could give me some pointers on where the best
place to start might be?

If you think there are some small tasks that I could meaningfully help with
I'd be happy to take a look. 


-----Original Message-----
From: Shad Storhaug <>
Sent: Sunday, March 22, 2020 3:22 PM
Subject: RE: Next release due


Thank you for your inquiry.

Lucene.NET is open source and all of its contributors are volunteers that
work on their own schedule, so it is difficult to give you an exact
timeframe that it will be released in. However, we have recently been
keeping an updated list of remaining tasks and time estimates, which
indicate we are roughly 700-800 hours away from completion, with about 1/3
of that time being the completion of the ICU4N project
( (our biggest dependency). So far,
there have been roughly 4600 hours contributed toward the release, so we are
almost there. The remaining tasks today are roughly 60% of what we had in
August 2019.

All of the high priority items have been put into JIRA
( and on GitHub issues in
the case of ICU4N
e%3Abeta). Anything marked up-for-grabs is something that anyone can start
to work on if they wish to contribute. Let me know if you need any
suggestions for small tasks that can be done in a small amount of time to
get familiar with the project and the Apache process. 

At our current rate it may be well into next year (2021) for a stable
release, but we could shorten that timeframe significantly (6 months or
less) if more people were willing to help out with getting the remaining
tasks done. After the stable release of Lucene.NET 4.8.0, we also have a
plan to upgrade from Lucene 4.8.0 to Lucene 8.x in around 1700 hours by only
porting over the changes (delta) between the releases.

But the bottom line is, we need more contributions to get over the finish
line in a reasonable timeframe. If you could contribute some of your time,
it would mean a lot to the thousands of users that depend on Lucene.NET.

Shad Storhaug
Project Chairperson - Apache Lucene.NET

-----Original Message-----
From: Michael Condillac <> On Behalf Of
Sent: Sunday, March 22, 2020 1:43 PM
Subject: Next release due

Hi all,

Hope you are all safe in this turbulent time. One of the silver linings, if
I can use that term lightly for such a serious situation, in the whole
affair is the opportunity it offers to switch from urgent commercial work to
projects on the back burner.

One of my side projects requires a search engine implementation and I had
briefly looked at Lucene.Net a while back. Now I see the latest stable
release (3.0.3) is from 2012 and 4.8 is in beta. 

I see that significant work has already been completed and am confident I
can get my idea to POC stage - are you close to a final release? I wasn't
able to find any indicative dates.

Thanks for any help - I realise your priorities may be in other areas at
this time.


Ps. Apologies, I have resent this as I hadn't added a new more relevant
subject line.

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