Details
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Bug
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Status: Resolved
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Blocker
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Resolution: Fixed
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2.6.1
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None
Description
When upgrading from Ambari 2.5.2 to Ambari 2.6.0, we hit this error preventing from completing the ambari-server upgrade.
20 Nov 2017 11:39:08,115 ERROR [main] SchemaUpgradeHelper:202 - Upgrade failed. com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (`ambari_01`.`clusters`, CONSTRAINT `FK_clusters_upgrade_id` FOREIGN KEY (`upgrade_id`) REFERENCES `upgrade` (`upgrade_id`))
To get around this, he had to restore the db backup from 2.5.3 and adjust a table in mysql with ‘update clusters set upgrade_id = null’ so a record in the ‘upgrades’ table could be removed.
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