If you are using jca file adapter in OSB for business service or proxy service and while deploying into cluster Environment instead of file Adapter change to HAFileAdapter
Go to deployment in console -> click on file adapter -> click on HAFile Adapter ->go to properties -> enter below details
Go to Datasource ->jdbc/SOADataSource select target server as OSB Server
->jdbc/SOALocalTxDataSource select target server as OSB Server
Go to deployment in console -> click on file adapter -> click on HAFile Adapter ->go to properties -> enter below details
Go to Datasource ->jdbc/SOADataSource select target server as OSB Server
->jdbc/SOALocalTxDataSource select target server as OSB Server