org.elasticsearch.index.translog.TranslogTests#testStats failing on 6.8

[dliappis]

Observed a failure on branch 6.8 for TranslogTests in #testStats:

  | FAILURE 0.02s J15 \| TranslogTests.testStats <<< FAILURES! |  
  | > Throwable #1: java.lang.AssertionError: |  
  | > Expected: a value greater than <1L> |  
  | >      but: <1L> was equal to <1L> |  
  | > 	at __randomizedtesting.SeedInfo.seed([6B2A44E9E0939A49:F1AB1D56884F546A]:0) |  
  | > 	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20) |  
  | > 	at org.elasticsearch.index.translog.TranslogTests.testStats(TranslogTests.java:439) |  
  | > 	at java.lang.Thread.run(Thread.java:748)

Reproduction line:

./gradlew ':server:unitTest' -Dtests.seed=6B2A44E9E0939A49 -Dtests.class=org.elasticsearch.index.translog.TranslogTests -Dtests.method="testStats" -Dtests.security.manager=true -Dtests.locale=ru -Dtests.timezone=SystemV/MST7MDT -Dcompiler.java=12 -Druntime.java=8

Unfortunately I wasn't able to reproduce after 50 iterations on the same operating system.

CI link: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+6.8+matrix-java-periodic/ES_RUNTIME_JAVA=adoptopenjdk8,nodes=general-purpose/622/console / https://gradle-enterprise.elastic.co/s/6xn7qjvruu5x6

Interestingly enough this is the first time if fails on 6.8, however, there were a number of failures on master in February that got fixed by #51905.

@dnhatn :

The specific line in 6.8 asserts >1 in

elasticsearch/server/src/test/java/org/elasticsearch/index/translog/TranslogTests.java

Line 439 in fe9394c

assertThat(stats.getEarliestLastModifiedAge(), greaterThan(1L));

however, in #51905, we started asserting >0

elasticsearch/server/src/test/java/org/elasticsearch/index/translog/TranslogTests.java

Line 420 in 6d28596

assertThat(stats.getEarliestLastModifiedAge(), greaterThan(0L));

Is there a reason for this difference?

[elasticmachine]

Pinging @elastic/es-distributed (:Distributed/Engine)

[dnhatn]

Thanks @dliappis. I've opened #55085.

[dnhatn]

Fixed in #55085