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9300826d8a
When performing the test with 57 master-eligible nodes and one node crash, we saw messy elections, when multiple nodes were attempting to become master. JoinHelper has logged 105 long log messages with lengthy stack traces during one such election. To address this, we decided to log these messages every time only on debug level. We will log last unsuccessful join attempt (along with a timestamp) if any with WARN level if the cluster is failing to form. (cherry picked from commit 17a148cc27b5ac6c2e04ef5ae344da05a8a90902)