[SNMP4J] Memory Leak in SNMP4J (listening for traps)

[Adam Brons]

Hey Gang,

While writing an application to use SNMP4J to listen for v1, v2c, and v3 
traps over UDP we identified a memory leak.  I'm including some log data 
run against IBM's JVM version 1.5 as well as Sun's JVM 1.5 using the 
SnmpRequest tool to listen for trap messages on port 162/udp. On the IBM 
jvm SnmpRequest grew from 0.1% every 5 minutes on the Sun jvm it was 0.1% 
every 20 minutes.  None the less, in both cases the foot print continues 
to grow.  The command-line I was using to run SnmpRequest in both cases is 
as follows: "java -cp SNMP4J.jar org.snmp4j.tools.console.SnmpRequest -v 1 
-Ol 0.0.0.0/162"
The testing was done on Linux standard PC hardware running a flavor of 
RedHat. For my test the SnmpRequest received ZERO traps (on purpose). I've 
yet to reduce the heap size of java such that a heap dump is performed.

FYI on the file contents I was running ps -auwwx every 60 seconds along 
with the date command. If you have any questions let me know.

 

Adam Brons
TSOM Software Engineer
IBM Tivoli Software
(404) 591-8246 office
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