Update httpRequest 's body in javax.servlet.filter, and the body size will reduce 256byte,then upload file will failed

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upload.action | traceId: 0eab086e79d8c79d | userName: admin | action: upload
2021-05-20 13:40:47,150 WARN [http-nio-8090-exec-9] [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] doRollback Performing rollback. Transactions:
->[null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (Session #1788901290)