[ISSUE-4339][Bug] Fix latest savepoint lookup#4362
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What changes were proposed in this pull request
This PR fixes
FlinkSavepointServiceImpl#getLatestwhen duplicatelatest = truesavepoint records exist for the same application.The previous query used
one(), so MyBatis-Plus calledselectOne()and threwTooManyResultsExceptionif historical data contained more than one latest savepoint. This can make checkpoint polling repeatedly log errors, as reported in #4339.The query now orders by
triggerTimeandiddescending and limits the result to one row, so it returns the newest latest savepoint deterministically.Brief change log
triggerTimeandiddescending.one().latest = truesavepoint records.Verifying this change
FlinkSavepointServiceTest#testGetLatestReturnsNewestSavepointWhenDuplicateLatestRecordsExistfailed withTooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2.JAVA_HOME=$(/usr/libexec/java_home -v 17) ./mvnw -pl streampark-console/streampark-console-service -am -Dtest=FlinkSavepointServiceTest -Dsurefire.failIfNoSpecifiedTests=false testTests run: 4, Failures: 0, Errors: 0, Skipped: 0.Closes #4339.