The PostCommit Java ValidatesRunner Samza job is flaky

[github-actions[bot]]

The PostCommit Java ValidatesRunner Samza is failing over 50% of the time. Please visit https://github.com/apache/beam/actions/workflows/beam_PostCommit_Java_ValidatesRunner_Samza.yml?query=is%3Afailure+branch%3Amaster to see all failed workflow runs. See also Grafana statistics: http://metrics.beam.apache.org/d/CTYdoxP4z/ga-post-commits-status?orgId=1&viewPanel=3&var-Workflow=PostCommit%20Java%20ValidatesRunner%20Samza