Add took time to request nodes stats

[dzane17]

Description

Add overall took stats to request nodes/stats API output.

% curl -X PUT "localhost:9200/_cluster/settings?pretty&flat_settings" -H 'Content-Type: application/json' -d '{"transient" : {"search.request_stats_enabled" : true}}'
{
  "acknowledged" : true,
  "persistent" : { },
  "transient" : {
    "search.request_stats_enabled" : "true"
  }
}

% curl -XGET 'localhost:9200/_nodes/runTask-0/stats/indices/search?pretty=true'                
{
  "_nodes" : {
    "total" : 1,
    "successful" : 1,
    "failed" : 0
  },
  "cluster_name" : "runTask",
  "nodes" : {
    "BDYIv_PQS7ykbI2iGyhUMA" : {
      "timestamp" : 1722461703073,
      "name" : "runTask-0",
      "transport_address" : "127.0.0.1:9300",
      "host" : "127.0.0.1",
      "ip" : "127.0.0.1:9300",
      "roles" : [
        "cluster_manager",
        "data",
        "ingest",
        "remote_cluster_client"
      ],
      "attributes" : {
        "testattr" : "test",
        "shard_indexing_pressure_enabled" : "true"
      },
      "indices" : {
        "search" : {
          "open_contexts" : 0,
          "query_total" : 1,
          "query_time_in_millis" : 21,
          "query_current" : 0,
          "concurrent_query_total" : 0,
          "concurrent_query_time_in_millis" : 0,
          "concurrent_query_current" : 0,
          "concurrent_avg_slice_count" : 0.0,
          "fetch_total" : 1,
          "fetch_time_in_millis" : 5,
          "fetch_current" : 0,
          "scroll_total" : 0,
          "scroll_time_in_millis" : 0,
          "scroll_current" : 0,
          "point_in_time_total" : 0,
          "point_in_time_time_in_millis" : 0,
          "point_in_time_current" : 0,
          "suggest_total" : 0,
          "suggest_time_in_millis" : 0,
          "suggest_current" : 0,
          "search_idle_reactivate_count_total" : 0,
          "request" : {
            "took" : {
              "time_in_millis" : 129,
              "current" : 0,
              "total" : 1
            },
            "dfs_pre_query" : {
              "time_in_millis" : 0,
              "current" : 0,
              "total" : 0
            },
            "query" : {
              "time_in_millis" : 98,
              "current" : 0,
              "total" : 1
            },
            "fetch" : {
              "time_in_millis" : 6,
              "current" : 0,
              "total" : 1
            },
            "dfs_query" : {
              "time_in_millis" : 0,
              "current" : 0,
              "total" : 0
            },
            "expand" : {
              "time_in_millis" : 0,
              "current" : 0,
              "total" : 1
            },
            "can_match" : {
              "time_in_millis" : 0,
              "current" : 0,
              "total" : 0
            }
          }
        }
      }
    }
  }
}

Related Issues

Resolves #10768

Check List

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

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

❌ Gradle check result for f97cb0e: 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 295b28b: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 95.83333% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.88%. Comparing base (b911b6f) to head (93ac279).
Report is 5 commits behind head on main.

Files	Patch %	Lines
...org/opensearch/index/search/stats/SearchStats.java	91.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #15054      +/-   ##
============================================
+ Coverage     71.80%   71.88%   +0.08%     
- Complexity    62775    62845      +70     
============================================
  Files          5169     5169              
  Lines        294665   294688      +23     
  Branches      42616    42616              
============================================
+ Hits         211574   211828     +254     
+ Misses        65678    65433     -245     
- Partials      17413    17427      +14     

☔ View full report in Codecov by Sentry.
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[dblock]

Please don't forget to add this to https://github.com/opensearch-project/opensearch-api-specification.

[jed326]

Would be great to get a yaml test to verify the request response looks how you want it to look but changes LGTM

[github-actions]

❕ Gradle check result for 93ac279: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.http.SearchRestCancellationIT.testAutomaticCancellationMultiSearchDuringFetchPhase

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

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-15054-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 76b9931299b4a45308b7ede4659e750eacd5006a
# Push it to GitHub
git push --set-upstream origin backport/backport-15054-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-15054-to-2.x.

[jed326]

@dzane17 could you please open a manual backport PR for this? And please make sure to open the api-spec PR as well.

[dzane17]

Please don't forget to add this to https://github.com/opensearch-project/opensearch-api-specification.

@dblock I added a nested field in the nodes stats response, have not changed any APIs. Is api-spec needed? I noticed existing nodes stats tests don't reach the nesting depth of my change so was not what to build off of.

[dblock]

Please don't forget to add this to https://github.com/opensearch-project/opensearch-api-specification.

@dblock I added a nested field in the nodes stats response, have not changed any APIs. Is api-spec needed? I noticed existing nodes stats tests don't reach the nesting depth of my change so was not what to build off of.

It adds a new field to the response object, right? Therefore it's an API change (albeit a backwards compatible one).

Def add a test that reaches deeper!