error from server1: 2016-10-05 15:45:04,797 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 76) MSC000001: Failed to start service jboss.persistenceunit."business-central.war#org.jbpm.domain": org.jboss.msc.service.StartException in service jboss.persistenceunit."business-central.war#org.jbpm.domain": javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.domain] Unable to build Hibernate SessionFactory at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:172) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117) at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:667) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:182) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) at org.jboss.threads.JBossThread.run(JBossThread.java:320) Caused by: javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.domain] Unable to build Hibernate SessionFactory at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:954) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:882) at org.jboss.as.jpa.hibernate5.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:154) ... 7 more Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Unable to execute schema management to JDBC target [alter table Attachment add constraint FKd5xpm81gxg8n40167lbu5rbfb foreign key (attachedBy_id) references OrganizationalEntity] at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:59) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlString(SchemaMigratorImpl.java:431) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlStrings(SchemaMigratorImpl.java:420) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applyForeignKeys(SchemaMigratorImpl.java:386) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigrationToTargets(SchemaMigratorImpl.java:214) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:60) at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:134) at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:101) at org.hibernate.internal.SessionFactoryImpl.(SessionFactoryImpl.java:470) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:879) ... 9 more Caused by: java.sql.SQLSyntaxErrorException: ORA-02275: such a referential constraint already exists in the table at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399) at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257) at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:587) at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:210) at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:30) at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:931) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1150) at oracle.jdbc.driver.OracleStatement.executeUpdateInternal(OracleStatement.java:1707) at oracle.jdbc.driver.OracleStatement.executeUpdate(OracleStatement.java:1670) at oracle.jdbc.driver.OracleStatementWrapper.executeUpdate(OracleStatementWrapper.java:310) at org.jboss.jca.adapters.jdbc.WrappedStatement.executeUpdate(WrappedStatement.java:430) at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:56) ... 19 more error from server2: 2016-10-05 15:43:46,151 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 75) MSC000001: Failed to start service jboss.persistenceunit."business-central.war#org.jbpm.domain": org.jboss.msc.service.StartException in service jboss.persistenceunit."business-central.war#org.jbpm.domain": javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.domain] Unable to build Hibernate SessionFactory at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:172) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117) at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:667) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:182) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) at org.jboss.threads.JBossThread.run(JBossThread.java:320) Caused by: javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.domain] Unable to build Hibernate SessionFactory at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:954) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:882) at org.jboss.as.jpa.hibernate5.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:154) ... 7 more Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Unable to execute schema management to JDBC target [create sequence hibernate_sequence start with 1 increment by 1] at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:59) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlString(SchemaMigratorImpl.java:431) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlStrings(SchemaMigratorImpl.java:420) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigrationToTargets(SchemaMigratorImpl.java:196) at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:60) at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:134) at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:101) at org.hibernate.internal.SessionFactoryImpl.(SessionFactoryImpl.java:470) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:879) ... 9 more Caused by: java.sql.SQLSyntaxErrorException: ORA-00955: name is already used by an existing object at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399) at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257) at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:587) at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:210) at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:30) at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:931) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1150) at oracle.jdbc.driver.OracleStatement.executeUpdateInternal(OracleStatement.java:1707) at oracle.jdbc.driver.OracleStatement.executeUpdate(OracleStatement.java:1670) at oracle.jdbc.driver.OracleStatementWrapper.executeUpdate(OracleStatementWrapper.java:310) at org.jboss.jca.adapters.jdbc.WrappedStatement.executeUpdate(WrappedStatement.java:430) at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:56) ... 18 more