[SNMP4J] Regression in snmp4j 1.9.1g (NullPointerException for async send)

[Christof Meerwald]

Hi,

there appears to be a pretty nasty regression in snmp4j 1.9.1g (might 
have been introduced in 1.9.1f) where you get a NullPointerException in 
Snmp$PendingRequest.pduHandleAssigned (Snmp.java, line 1428) when trying 
to send an asynchronous request (essentially just using the code from 
the Javadoc to send an asynchronous SNMPv1 request).

The problem appears to be that a call to createPendingTimer() (if timer 
== null) has been added to the synchronous send method, but not to the 
asynchronous send method in Snmp.java. Therefore, the timer variable 
could still potentially be null in the pduHandleAssigned callback and 
result in a NullPointerException.

So, I think, a call to createPendingTimer needs to be added to the 
asynchronous send method as well (Snmp.java, line 850).


Christof

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