Open sessions - JMX

Forum|Forum|7 years ago
August 3, 2018
15 replies
6311 views

Hi All

I am trying to figure out the code which has a session leak. I am following Adobe's documentation.Check and analyze if JCR session leaks in your AEM instance

But I have few models where a resourceResolver is injected using

@SlingObject

private ResourceResolver resolver;

I can see few class reference in JMX which has these classes mentioned in the stack trace. How will we handle these resolvers? Will these be closed automatically ?

TIA

Veena

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Best answer by joerghoh

I just checked [1] and I haven't found a way that the ResourceTypeResolver (which seems to leak in your case) is actually leaking. It is always closed (line 665ff).

I cannot explain the fact that a lot of these session are actually open (it would be good if you could verify that by a heapdump), and that it's not a problem of the garbage collection.

[1] sling-org-apache-sling-resourceresolver/ResourceResolverControl.java at org.apache.sling.resourceresolver-1.4.8 · apache…

Show previous replies

VeenaVikraman

Author

Community Advisor

current prod servers are 6.2 , we will be moving to 6.4 in may be 4 months.

joerghoh

Accepted solution

Adobe Employee

I just checked [1] and I haven't found a way that the ResourceTypeResolver (which seems to leak in your case) is actually leaking. It is always closed (line 665ff).

I cannot explain the fact that a lot of these session are actually open (it would be good if you could verify that by a heapdump), and that it's not a problem of the garbage collection.

[1] sling-org-apache-sling-resourceresolver/ResourceResolverControl.java at org.apache.sling.resourceresolver-1.4.8 · apache…

VeenaVikraman

Author

Community Advisor

There are few sessions like below (around 6k) opened in STAGE. How can I trace from where this sessions are opened ?

joerghoh

Adobe Employee

Below that (and not contained in the screenshot) there is a field "stacktrace", which should be filled with the stacktrace. This stacktraces are only created when more than 1000 sessions are opened (default), so you should check the youngest sessions, they should contain these stacks.

M

Mansi1

My AEM version is 6.5 and oak core is 1.10.8, so is it that initstacktraces will show data only if opened sessions are > 1000? Currently initstacktrace is showing empty. Where this property "oak.sessionStats.initStackTraceThreshold" can be tuned?