Memory Leak on SNMP binding?

Add-ons Bindings
1

I run oh2 on a Qnap with bindings to homematic, hue, fritzbox, snmp, netupstools and others.
From time to time (aprox once a week) the server stops responding and the logfile contains OutOfMemroy errors.
I tracked this down using the java option -XX:+HeapDumpOnOutOfMemoryError and the jmap tool.
Here is the result:

Problem Suspect 1
One instance of “org.snmp4j.Snmp” loaded by “org.openhab.binding.snmp” occupies 615.249.152 (84,94%) bytes. The memory is accumulated in one instance of “java.util.Hashtable$Entry[]” loaded by “”.

Now i disabled the snmp binding, hopefully the error is now gone.
This binding is not essential to my installtion. I used it to check the status the qnap-nas and the hp-printer.

Anyone else have similiar problems with this binding?
…and how/where can i check for a newwer version of the binding?

Thx, Georg from Italy

2

Getting the same thing, except I’m using SNMP.

Looking at

http://www.snmp4j.org/doc/org/snmp4j/Snmp.html

it talks about calling snmp.cancel() in the listener callback onResponse() or you end up with a memory leak. The openhab binding doesn’t call this method so this might be a smoking gun (or at least for me).

3

Just submitted bug and solution here: https://github.com/openhab/openhab1-addons/issues/5202