spring + struts + ejb + on jpa, entity mapped with lazy loading in web client call causes no sesssion or session has closed error

Environment :
project structure spring + struts + ejb + jpa

diagram:



entity on the map with lazy loading will cause no sesssion or session has closed errors.

join in web.xml

jpa-open-entity-manager
org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter


jpa-open-entity-manager
/ *


but it is reported not find entityManagerFactory. How spring should be configured ?

how to solve this problem ?



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have some academic significance. Experts expect it.
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Following
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can take a break the method set to non- lazy loaded, but the depth is set to 2 , this will solve most problems.
let them go check the rest of the
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complement one , action was into war in , session bean into the ejb jar, even though all of them deployed in the same jboss , the above error is still reported .
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did not have time to wait for a project tight ah
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can also be set for all the lazy loading are all manually loaded. many-one, a unilateral increase in the multi- id, manual control .
If it involves the efficiency problem, you can try to add a layer of cache.