[SNMP4J] SNMP Agent NULL point exception for GET MESSAGE

[Muralidharan Narayanan]

Hello:
I have a "java.lang.NullPointerException" occurring when I issue a GET
variable command to my agent.

I am using SNMPv2c. Agent (this is NOT the TestAgent but our implemented
version) was fully functional with library SNMP4J-1.7.6a and
SNMP4J-agent-1.0.1a. With these older libraries I was able to receive traps
and issue GET commands without any problem.
------
Here is what I did. I updated the libraries to SNMP4J-1.8.2 and
SNMP4J-agent-1.1.4. I am able to receive traps at SNMP managers without any
problem. But now I get the below "ERROR
DefaultUDPTransportMapping_204.192.50.200/161
org.snmp4j.MessageDispatcherImpl - java.lang.NullPointerException" when I
issue a GET command.
Any ideas what I am missing.
-----
NOTE: updated libraries all worked fine when I test with sample TestAgent
provided

Any help is appreciated. Thanks
Murali
--------------------------------------------------------
OUTPUT --------------------------------

2007-10-09 11:40:47,499 INFO main org.snmp4j.agent.DefaultMOServer -
Registered MO
DefaultMOTable[id=1.3.6.1.6.3.16.1.1.1,index=org.snmp4j.agent.mo.MOTableInde
x at 8ff4cf,columns=[org.snmp4j.agent.mo.MOColumn[columnID=1,syntax=4]]] in
default context with scope
DefaultMOTable[id=1.3.6.1.6.3.16.1.1.1,index=org.snmp4j.agent.mo.MOTableInde
x at 8ff4cf,columns=[org.snmp4j.agent.mo.MOColumn[columnID=1,syntax=4]]]
...
2007-10-09 11:40:47,562 INFO main org.snmp4j.agent.DefaultMOServer -
Registered MO
DefaultMOTable[id=1.3.6.1.4.1.8716.2.10.1,index=com.triveni.streamscope.snmp
Agent.StreamscopeMib$8 at 162e295,columns=[org.snmp4j.agent.mo.MOColumn[columnI
D=1,syntax=66],
org.snmp4j.agent.mo.snmp.DisplayString[columnID=2,syntax=4,default=null,mode
=], org.snmp4j.agent.mo.MOColumn[columnID=3,syntax=66]]] in default context
with scope
DefaultMOTable[id=1.3.6.1.4.1.8716.2.10.1,index=com.triveni.streamscope.snmp
Agent.StreamscopeMib$8 at 162e295,columns=[org.snmp4j.agent.mo.MOColumn[columnI
D=1,syntax=66],
org.snmp4j.agent.mo.snmp.DisplayString[columnID=2,syntax=4,default=null,mode
=], org.snmp4j.agent.mo.MOColumn[columnID=3,syntax=66]]]
2007-10-09 11:40:47,609 INFO DefaultUDPTransportMapping_204.192.50.200/161
org.snmp4j.transport.DefaultUdpTransportMapping - UDP receive buffer size
for socket 204.192.50.200/161 is set to: 8192
2007-10-09 11:40:50,499 INFO main
org.snmp4j.agent.mo.snmp.NotificationOriginatorImpl - Sent notification
TRAP[requestID=1888639608, errorStatus=Success(0), errorIndex=0,
VBS[1.3.6.1.2.1.1.3.0 = 0:00:03.28; 1.3.6.1.6.3.1.1.4.1.0 =
1.3.6.1.4.1.8716.2.11.0.1; 1.3.6.1.4.1.8716.2.2.1 = Murali;
1.3.6.1.4.1.8716.2.2.2 = ON; 1.3.6.1.4.1.8716.2.2.3 = 204.192.50.200;
1.3.6.1.4.1.8716.2.2.4 = Tue Oct 09 10:32:59 EDT 2007;
1.3.6.1.4.1.8716.2.2.5 = Tue Oct 09 10:32:59 EDT 2007;
1.3.6.1.4.1.8716.2.2.6 = Mon Oct 08 17:01:42 EDT 2007]] to
CommunityTarget[address=204.192.50.200/162, version=1, timeout=2000,
retries=1, community=public]
2007-10-09 11:41:05,203 ERROR DefaultUDPTransportMapping_204.192.50.200/161
org.snmp4j.MessageDispatcherImpl - java.lang.NullPointerException