[Backport 2.x] Fix dissect ingest processor parsing empty brackets failed

[opensearch-trigger-bot]

Backport 7b62e2f from #9255.

[github-actions]

Compatibility status:

Checks if related components are compatible with change 6ccb649

Incompatible components

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/performance-analyzer-rca.git]

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (ca8b54c) 71.10% compared to head (6ccb649) 71.05%.
Report is 77 commits behind head on 2.x.

Files	Patch %	Lines
...ain/java/org/opensearch/dissect/DissectParser.java	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #10667      +/-   ##
============================================
- Coverage     71.10%   71.05%   -0.06%     
+ Complexity    59204    59124      -80     
============================================
  Files          4869     4869              
  Lines        278732   278738       +6     
  Branches      40848    40849       +1     
============================================
- Hits         198196   198049     -147     
- Misses        63786    63989     +203     
+ Partials      16750    16700      -50     

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[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/28158/
• CommitID: 5871d97
  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?

[gaobinlong]

@dblock ,could you help to review this backport PR?

[dblock]

@gaobinlong Please take a look at Gradle check failures, call out flakes and such.

[dblock]

For some reason GH is not letting me restart the gradle check either, force push an update?

[gaobinlong]

Existing flaky tests: #8932, I've created a new issue for another failed test: #11299.

[gaobinlong]

@dblock I cannot update the backport branch because this PR was created by the bot, I don't have permission.

[dblock]

I am not sure why, but GitHub UX no longer lets me restart this gradle check. Re-create the backport by hand please, sorry.

[andrross]

@gaobinlong I rebased this PR from 2.x and pushed an update

[github-actions]

❕ Gradle check result for 6ccb649: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.remotestore.RemoteIndexPrimaryRelocationIT.testPrimaryRelocationWhileIndexing

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

[gaobinlong]

@gaobinlong I rebased this PR from 2.x and pushed an update

Thanks @andrross , the failed test is flaky, and there's an issue. The check result becomes green, I think this PR can be merged now.

[opensearch-trigger-bot]

This PR is stalled because it has been open for 30 days with no activity.

[ticheng-aws]

Hi @gaobinlong, @dblock, and @andrross, the PR is stalled. Is this being worked upon?

[gaobinlong]

I think this PR is ready to merge, please help to merge, @dblock @andrross thanks!