[jira] [Created] (ZOOKEEPER-4511) Flaky test: FileTxnSnapLogMetricsTest.testFileTxnSnapLogMetrics

["Kezhu Wang (Jira)" <ji...@apache.org>]

Kezhu Wang created ZOOKEEPER-4511:
-------------------------------------

             Summary: Flaky test: FileTxnSnapLogMetricsTest.testFileTxnSnapLogMetrics
                 Key: ZOOKEEPER-4511
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4511
             Project: ZooKeeper
          Issue Type: Bug
          Components: tests
            Reporter: Kezhu Wang


* https://github.com/kezhuw/zookeeper/runs/5830250287?check_suite_focus=true
* https://github.com/apache/zookeeper/runs/5759834147?check_suite_focus=true


{code:none}
org.opentest4j.AssertionFailedError: expected: <1> but was: <0>
	at org.apache.zookeeper.server.persistence.FileTxnSnapLogMetricsTest.testFileTxnSnapLogMetrics(FileTxnSnapLogMetricsTest.java:86)
{code}

This test tries to write some txns to trigger snapshot with remaning txns in txn log. But snapshot taking is asynchronous, thus all txns could be written to snapshot. So in restarting, it is possible that no txns to load after snapshot restored. This will fail assertion.



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