Cannot find proxy listener for Response listener warning

Document ID : KB000032119
Last Modified Date : 14/02/2018
Show Technical Document Details

Question:  

Is the following error in my Data Collector karaf.log cause for concern?:

Cannot find proxy listener for Response listener: com.ca.im.dm.snmp.collector.TooBigListener@ca3f20c

 

Answer: 

The full warning seen in the data collector karaf.log would look something like this:

2015-05-08 14:36:16,831 | WARN | Response Pool.0 | SnmpSession | m.ca.im.dm.snmp.snmp4j.SnmpProxy 188 | 197 - com.ca.im.data-collection-manager.snmp - 2.4.1.SNAPSHOT-148 | | Cannot find proxy listener for Response listener: com.ca.im.dm.snmp.collector.TooBigListener@ca3f20c for Request: GET[requestID=22808822, errorStatus=Success(0), errorIndex=0, VBS[1.3.6.1.2.1.1.3.0 = Null; 1.3.6.1.2.1.2.2.1.10.4 = Null; 1.3.6.1.2.1.2.2.1.11.4 = Null; 1.3.6.1.2.1.2.2.1.12.4 = Null; 1.3.6.1.2.1.2.2.1.13.4 = Null; 1.3.6.1.2.1.2.2.1.14.4 = Null; 1.3.6.1.2.1.2.2.1.16.4 = Null; 1.3.6.1.2.1.2.2.1.17.4 = Null; 1.3.6.1.2.1.2.2.1.18.4 = Null; 1.3.6.1.2.1.2.2.1.19.4 = Null; 1.3.6.1.2.1.2.2.1.20.4 = Null; 1.3.6.1.2.1.2.2.1.5.4 = Null; 1.3.6.1.2.1.31.1.1.1.10.4 = Null; 1.3.6.1.2.1.31.1.1.1.11.4 = Null; 1.3.6.1.2.1.31.1.1.1.12.4 = Null; 1.3.6.1.2.1.31.1.1.1.13.4 = Null; 1.3.6.1.2.1.31.1.1.1.15.4 = Null; 1.3.6.1.2.1.31.1.1.1.2.4 = Null; 1.3.6.1.2.1.31.1.1.1.3.4 = Null; 1.3.6.1.2.1.31.1.1.1.4.4 = Null; 1.3.6.1.2.1.31.1.1.1.5.4 = Null; 1.3.6.1.2.1.31.1.1.1.6.4 = Null; 1.3.6.1.2.1.31.1.1.1.7.4 = Null; 1.3.6.1.2.1.31.1.1.1.8.4 = Null; 1.3.6.1.2.1.31.1.1.1.9.4 = Null]]

 

That warning is benign.  For every SNMP request we send out, it will be put onto a hash map and then will be removed from the map after a response is received or the request is timed out.  There are some cases where we tried to remove the entry twice which then caused the warning.  This warning can be safely ignored and will be removed in the 2.5 release of the product.