Hi, Our system uses Net-SNMP on both ends of the AgentX master/subagent relationship. With Net-SNMP 5.5, everything was very stable. With Net-SNMP 5.6, the subagent occasionally reconnects after a period of not being able to serve its objects.
The subagent tracing looks like it stops getting requests from the master, pings a few times, with responses to the pings, and then finds that the session is disconnected: agentx/subagent: handling agentx request (req=0x50fa0,trans=0x50f9f,sess=0x9) agentx/subagent: -> get agentx/subagent: handling AgentX response (cmd 0xa2 orig_cmd 0x05) agentx/subagent: FINISHED agentx/subagent: checking status of session 0x9ebb6e0 agentx/subagent: synching input, op 0x01 agentx/subagent: session 0x9ebb6e0 responded to ping agentx/subagent: checking status of session 0x9ebb6e0 agentx/subagent: synching input, op 0x01 agentx/subagent: session 0x9ebb6e0 responded to ping agentx/subagent: checking status of session 0x9ebb6e0 agentx/subagent: synching input, op 0x01 agentx/subagent: session 0x9ebb6e0 responded to ping agentx/subagent: transport disconnect indication The master agent thinks that it sent a request but never got a response to it (note that this is a different session, I have not yet been able to get tracing from master and subagent simultaneously): agentx/master: agentx master handler starting, mode = 0xa0 agentx/master: request for variable (SNMPv2-SMI::mib-2.16.1.4.1.2.23) agentx/master: request for variable (IP-MIB::ipAdEntNetMask.172.17.11.144) agentx/master: sending pdu (req=0x1fda6,trans=0x1fda5,sess=0x9) agentx_build: packet built okay agentx_build: packet built okay agentx_build: packet built okay agentx_build: packet built okay agentx_build: packet built okay agentx_build: packet built okay agentx/master: timeout on session 0xb84fb2c0 req=0x1fda6 agentx/master: close 0xb84fb2c0, -1 agentx/master: close transport Note that it's 20,000 or more requests before this occurs. I'm going to continue debugging this; I plan to make sure that the master side logs ping responses and improve the subagent logs to be able to correlate them better with the master logs, but was wondering if anyone else had run into this phenomenon with 5.6. (I've already diffed agent/mibgroup/agentx between 5.5 and 5.6, it's almost all cleanups that can't explain this; there's something more subtle going on somewhere.) Thanks, Bill ------------------------------------------------------------------------------ Lotusphere 2011 Register now for Lotusphere 2011 and learn how to connect the dots, take your collaborative environment to the next level, and enter the era of Social Business. http://p.sf.net/sfu/lotusphere-d2d _______________________________________________ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
