Adding integration of derived source feature across diff paths

[tanik98]

Description

• Integrating derive source feature in get and search path
• Tested this integration for various cases.
• Added integration tests for all relevant paths like create/update/get/search/reindex/recover.
• For recover flow have added IntegrationTests around cases like node restart, index replication etc.

Considerations:

• For the scenarios where we read from the translog, we have created the in-memory lucene index, which will ensure that we derive source from lucene docValues and stored fields only instead of reading _source directly from translog. This will help in making final resulted source consistent in terms of various fields(like Date, GeoPoint(we always return in lat/lon pair, input source can have different format like geohash)) where display format can vary as compared to suppkied format passed during ingestion.

This PR is a continuation of #17759

Related Issues

Resolves #17073

Part of feature #9568

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue has been created.

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[github-actions]

❌ Gradle check result for 116f32e: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 1d5e1aa: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❕ Gradle check result for 2cf97a1: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

Attention: Patch coverage is 68.90244% with 51 lines in your changes missing coverage. Please review.

Project coverage is 72.72%. Comparing base (3b018ad) to head (77f80d9).
Report is 39 commits behind head on main.

Files with missing lines	Patch %	Lines
...rg/opensearch/index/engine/TranslogLeafReader.java	43.10%	27 Missing and 6 partials ⚠️
...java/org/opensearch/index/mapper/ObjectMapper.java	33.33%	7 Missing and 1 partial ⚠️
...va/org/opensearch/index/engine/InternalEngine.java	68.75%	3 Missing and 2 partials ⚠️
.../main/java/org/opensearch/index/mapper/Mapper.java	0.00%	2 Missing ⚠️
.../org/opensearch/index/mapper/RootObjectMapper.java	80.00%	2 Missing ⚠️
...in/java/org/opensearch/index/shard/IndexShard.java	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #18054      +/-   ##
============================================
+ Coverage     72.52%   72.72%   +0.20%     
- Complexity    67509    67731     +222     
============================================
  Files          5496     5499       +3     
  Lines        311467   311781     +314     
  Branches      45253    45257       +4     
============================================
+ Hits         225891   226755     +864     
+ Misses        67180    66581     -599     
- Partials      18396    18445      +49     

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[msfroh]

@tanik98 This part of the test only works if you can guarantee that you're merged down to a single segment.

Since you have a random IndexWriterConfig, sometimes it will flush in the middle of adding docs.

[msfroh]

Test failure:

Suite: Test class org.opensearch.common.lucene.index.DerivedSourceLeafReaderTests
  1> [2025-06-10T16:49:21,747][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetSequentialStoredFieldsReaderWithInvalidReader] before test
  1> [2025-06-10T16:49:21,748][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetSequentialStoredFieldsReaderWithInvalidReader] after test
  1> [2025-06-10T16:49:21,758][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testWithRandomDocuments] before test
  1> [2025-06-10T16:49:21,761][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testWithRandomDocuments] after test
  2> REPRODUCE WITH: ./gradlew ':server:test' --tests "org.opensearch.common.lucene.index.DerivedSourceLeafReaderTests.testWithRandomDocuments" -Dtests.seed=7EFEA17C239307B5 -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=ff-Adlm-SN -Dtests.timezone=America/Cayenne -Druntime.java=21
  2> java.lang.IndexOutOfBoundsException: Index 8 out of bounds for length 8
        at __randomizedtesting.SeedInfo.seed([7EFEA17C239307B5:480F885B0D6542F4]:0)
        at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)
        at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
        at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
        at java.base/java.util.Objects.checkIndex(Objects.java:385)
        at org.apache.lucene.index.CodecReader$1.document(CodecReader.java:100)
        at org.opensearch.common.lucene.index.DerivedSourceStoredFieldsReader$DerivedSourceStoredFields.document(DerivedSourceStoredFieldsReader.java:108)
        at org.opensearch.common.lucene.index.DerivedSourceLeafReaderTests.testWithRandomDocuments(DerivedSourceLeafReaderTests.java:184)
  1> [2025-06-10T16:49:21,775][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetCoreAndReaderCacheHelper] before test
  1> [2025-06-10T16:49:21,775][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetCoreAndReaderCacheHelper] after test
  1> [2025-06-10T16:49:21,779][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testStoredFields] before test
  1> [2025-06-10T16:49:21,780][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testStoredFields] after test
  1> [2025-06-10T16:49:21,783][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetSequentialStoredFieldsReaderWithSequentialReader] before test
  1> [2025-06-10T16:49:21,784][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetSequentialStoredFieldsReaderWithSequentialReader] after test
  1> [2025-06-10T16:49:21,787][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetSequentialStoredFieldsReaderWithCodecReader] before test
  1> [2025-06-10T16:49:21,788][INFO ][o.o.c.l.i.DerivedSourceLeafReaderTests] [testGetSequentialStoredFieldsReaderWithCodecReader] after test

[rishabhmaurya]

thanks @msfroh for pointers.
I think we could have a bit more careful merging the changes when second last build failed with these flaky tests - #18054 (comment)
created #18485

[andrross]

@msfroh @rishabhmaurya Any reason not to revert this commit in the meantime while the test failure is investigated?

Edit: looks like a fix is ready: #18493

[rishabhmaurya]

@andrross looks like we have PR to address it #18493
we can merge and see if it helps, it not, its probably wiser to revert this change.

[tanik98]

It should help, we can merge and try it out. Please help with the review on #18493.