Hi, I wanted to take a look at the flaky DeleteReplicaTest test.
Some background first: - Past 7 days trend: Class: org.apache.solr.cloud.DeleteReplicaTest Method: raceConditionOnDeleteAndRegisterReplica Failures: 15.56% (63 / 405) - Test failure is caused by a NullPointerException: ERROR (coreZkRegister-772-thread-1-processing-127.0.0.1:40471_solr) [n:127.0.0.1:40471_solr c:raceDeleteReplicaCollection s:shard1 r:core_node4 x:raceDeleteReplicaCollection_shard1_replica_n2] o.a.s.c.DeleteReplicaTest Failed to delete replica => java.lang.NullPointerException: Cannot invoke "org.apache.solr.core.CoreContainer.getZkController()" because the return value of "org.apache.solr.embedded.JettySolrRunner.getCoreContainer()" is null I am having some trouble reproducing on my local and I don't see how the getCoreContainer() method might return null. Could this be a timing issue somehow? If anyone has an idea on how to approach this, I would be happy to hear it. best, alex
