Temporarily disable sort optimization on _doc for 8.7 release. [LUCENE-9569]

[asfimport]

Sort optimization on _doc was introduced in #10489, but it looks unstable and lead to some recent tests failures. 

As the release of 8.7 is very soon, we need to temporarily disable this sort optimization for _doc for this release with a plan to stabilize it for later releases.

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Migrated from LUCENE-9569 by Mayya Sharipova (@mayya-sharipova), resolved Nov 12 2020
Pull requests: apache/lucene-solr#1959

[asfimport]

ASF subversion and git services (migrated from JIRA)

Commit 1c0f07a in lucene-solr's branch refs/heads/branch_8x from Mayya Sharipova
https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=1c0f07a

LUCENE-9569 Disalbe sort opt on _doc (#1959)

Sort optimization on _doc was introduced in PR #1856,
but it looks unstable and lead to some recent tests failure.
As the release of 8.7 is very soon, we need to temporarily
disable this sort optimization for _doc for this release
with a plan to stabilize it for later releases.

[asfimport]

Adrien Grand (@jpountz) (migrated from JIRA)

@mayya-sharipova Should we add it back now?

[asfimport]

Mayya Sharipova (@mayya-sharipova) (migrated from JIRA)

@jpountz Thank you for the reminder. I have reverted this commit, so sort optimization on _doc should again be enabled on branch_8x.

[asfimport]

ASF subversion and git services (migrated from JIRA)

Commit e403814 in lucene-solr's branch refs/heads/branch_8x from Mayya Sharipova
https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=e403814

Revert "LUCENE-9569 Disalbe sort opt on _doc (#1959)"

Re-enabled sort optimization on _doc

This reverts commit 1c0f07a.

[asfimport]

ASF subversion and git services (migrated from JIRA)

Commit e403814 in lucene-solr's branch refs/heads/branch_8x from Mayya Sharipova
https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=e403814

Revert "LUCENE-9569 Disalbe sort opt on _doc (#1959)"

Re-enabled sort optimization on _doc

This reverts commit 1c0f07a.