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pradeepdubey82
Level 5
May 20, 2016
Solved

Jcr Session is Closed

  • May 20, 2016
  • 4 replies
  • 5590 views

Hi All,

I am facing issue in session.logout. My code calls one method frequently, first time it runs successfully, next time it says session is closed. below is the finally clause for my method. Shall i not logout the session? Actually i don't want to leave the session in open state, if i have to keep it open, i would have end up leaving lot of open session objects.

Session session = null;

try {

session = resourceResolver.adaptTo(Session.class);

doSomething

} catch(Exception ex) {

} finally {

            if(session != null) {
                session.logout();
            }
        }

Please advise how to resolve the issue?

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Best answer by kautuk_sahni

Hi 

Please have a look at this old forum post:- http://help-forums.adobe.com/content/adobeforums/en/experience-manager-forum/adobe-experience-manager.topic.html/forum__pmor-below_is_thecode.html

//1) Do not call session.logout, but resourceResolver.close(); as the resourceResolver already has the connection to the repository (it basically wraps the session) and you request it from the RRFactory, you should close it, instead of the session you adapted from it.

2) Do you have this code in a JSP? Then the <defineObjects/> tag will provide you with a variable "resourceResolver" which contains the resourceResolver for the complete request. And if you close the session, the connection to the repository is gone, which explains the stack-trace you get.

 

Reference Articles:-

Link:- https://cqdump.wordpress.com/2013/07/23/cq-development-patterns-sling-resourceresolver-and-jcr-sessions/ [Important]

//The basic rule of ownership is: If you open a JCR session of a Sling ResourceResolver, you are also responsible for closing it. On the other hand: If you get passed a ResourceResolver or a Session object, do not call logout() or close() on it. 

 

Link:- http://tech.ethomasjoseph.com/2015/09/sling-who-is-closing-my-jcr-session.html

 

I hope this will help you.

Thanks and Regards

Kautuk Sahni

4 replies

kautuk_sahni
Community Manager
kautuk_sahniCommunity ManagerAccepted solution
Community Manager
May 23, 2016

Hi 

Please have a look at this old forum post:- http://help-forums.adobe.com/content/adobeforums/en/experience-manager-forum/adobe-experience-manager.topic.html/forum__pmor-below_is_thecode.html

//1) Do not call session.logout, but resourceResolver.close(); as the resourceResolver already has the connection to the repository (it basically wraps the session) and you request it from the RRFactory, you should close it, instead of the session you adapted from it.

2) Do you have this code in a JSP? Then the <defineObjects/> tag will provide you with a variable "resourceResolver" which contains the resourceResolver for the complete request. And if you close the session, the connection to the repository is gone, which explains the stack-trace you get.

 

Reference Articles:-

Link:- https://cqdump.wordpress.com/2013/07/23/cq-development-patterns-sling-resourceresolver-and-jcr-sessions/ [Important]

//The basic rule of ownership is: If you open a JCR session of a Sling ResourceResolver, you are also responsible for closing it. On the other hand: If you get passed a ResourceResolver or a Session object, do not call logout() or close() on it. 

 

Link:- http://tech.ethomasjoseph.com/2015/09/sling-who-is-closing-my-jcr-session.html

 

I hope this will help you.

Thanks and Regards

Kautuk Sahni

Kautuk Sahni
MaxBarrass
MaxBarrass
Level 3
October 26, 2018

Just a quick update on this DO NOT expect that resourceResolver.close(); will close your session as it will not. Close your session manually. New behaviour was implemented and resourceResolver.close(); does not close session anymore and your sever will fill up stale sessions untill its hangs or you reboot it.

So in short YOU MUST run session.logout before you run resourceResolver.close();

good luck!

joerghoh
Adobe Employee
joerghohAdobe Employee
Adobe Employee
October 26, 2018

MaxBarrass​: This must be a recent change, because for me whenever I requested a resourceResolver from the factory, it was sufficient to close the resourceResolver (even when I adapted it internally to a session and worked with the JCR API). Do you have some resource pointing to this change?

joerghoh
Adobe Employee
joerghohAdobe Employee
Adobe Employee
October 26, 2018

If you have a ResourceResolver already, adapting it to a Session does not open a new session; it just exposes the internal JCR session used by the ResourceResolver. Therefor you must not close this session.

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