Hello solr-users, I have built Solr 7.4.0 with upgraded version (25.0-jre/26.0-jre) of guava dependency. When unit tests are run against solr with guava 25.0-jre or 26.0-jre, some of the unit tests stall indefinitely and the testing never finishes up.
For example, here HdfsNNFailoverTest stall indefinitely. Log excerpts for unit test run with guava 25.0-jre: --------------- 13:54:39.392 [QUIET] [system.out] [junit4] HEARTBEAT J0 PID(258@8471261c0ae9): 2018-10-12T13:54:39, stalled for 70.6s at: HdfsNNFailoverTest (suite) 13:55:39.394 [QUIET] [system.out] [junit4] HEARTBEAT J0 PID(258@8471261c0ae9): 2018-10-12T13:55:39, stalled for 131s at: HdfsNNFailoverTest (suite) 13:56:39.395 [QUIET] [system.out] [junit4] HEARTBEAT J0 PID(258@8471261c0ae9): 2018-10-12T13:56:39, stalled for 191s at: HdfsNNFailoverTest (suite) 13:57:39.396 [QUIET] [system.out] [junit4] HEARTBEAT J0 PID(258@8471261c0ae9): 2018-10-12T13:57:39, stalled for 251s at: HdfsNNFailoverTest (suite) 13:58:39.398 [QUIET] [system.out] [junit4] HEARTBEAT J0 PID(258@8471261c0ae9): 2018-10-12T13:58:39, stalled for 311s at: HdfsNNFailoverTest (suite) 13:59:39.399 [QUIET] [system.out] [junit4] HEARTBEAT J0 PID(258@8471261c0ae9): 2018-10-12T13:59:39, stalled for 371s at: HdfsNNFailoverTest (suite) --------------- Appreciate if anyone could help/guide to avoid this unit test delay/stall. For more information, please see SOLR-12869 <https://issues.apache.org/jira/browse/SOLR-12869>. Thank you! -Vishal
