While opening the confluence server migration Assistant the below error.
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Oops - an error has occurred
System Error
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Cause
org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getInitialState' in class com.atlassian.migration.agent.web.AppAction threw exception com.atlassian.util.concurrent.LazyReference$InitializationException: javax.persistence.PersistenceException: Failed to update database schema at /templates/app.vm[line 21, column 44]
at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:223)
caused by: com.atlassian.util.concurrent.LazyReference$InitializationException: javax.persistence.PersistenceException: Failed to update database schema
at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:149)
caused by: javax.persistence.PersistenceException: Failed to update database schema
at com.atlassian.migration.agent.store.jpa.impl.LiquibaseSchemaUpgrader.upgrade(LiquibaseSchemaUpgrader.java:35)
caused by: liquibase.exception.LockException: Could not acquire change log lock. Currently locked by 172.31.214.58 (172.31.214.58) since 1/23/20 3:17 PM
at liquibase.lockservice.StandardLockService.waitForLock(StandardLockService.java:230)
