Unable to read processes on device

[Chet Luther]

Chet Luther [http://community.zenoss.org/people/cluther] created the discussion

"Re: Unable to read processes on device"

To view the discussion, visit: http://community.zenoss.org/message/62862#62862

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Zenoss monitor processes using UCD-SNMP-MIB::prTable. It uses a combination of HOST-RESOURCES-MIB::hrSWRun and HOST-RESOURCES-MIB::hrSWRunPerf to be compatible with any SNMP agent exposing the HOST-RESOURCES-MIB rather than just Net-SNMP agents.

That being said, to troubleshoot why you might be getting that "Unable to read processes on device" error, you should look to the hrSWRun and hrSWRunPerf roots. These contain information for all processes running on the system, not just ones you explicitely identify in your snmpd.conf. For this reason they take longer to walk and you could just be running into a timeout.

To address timeouts you could try to increase the zSnmpTimeout, zSnmpTries or even zMaxOIDPerRequest.
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[Mike McDonough]

Mike McDonough [http://community.zenoss.org/people/mikemcdonough] created the discussion

"Re: Unable to read processes on device"

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http://comments.gmane.org/gmane.comp.monitoring.zenoss.user/44480 http://comments.gmane.org/gmane.comp.monitoring.zenoss.user/44480

This post seems to shed some light on the problem.
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[liondgr8 .]

liondgr8 . [http://community.zenoss.org/people/pranay] created the discussion

"Re: Unable to read processes on device"

To view the discussion, visit: http://community.zenoss.org/message/66259#66259

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I am getting this error:
"Unable to read processes on device <device>; error: Device <device> does not publish HOST-RESOURCES-MIB"

i have added this device with net-snmp agent
did any one got this issue and resolved it?
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[Mike McDonough]

Mike McDonough [http://community.zenoss.org/people/mikemcdonough] created the discussion

"Re: Unable to read processes on device"

To view the discussion, visit: http://community.zenoss.org/message/66260#66260

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What type of agent are you quering?  If you can otherwise see snmp results but not the HR branch, my guess is it sounds like an access issue.

If its linux running net-snmp check your access controls (com2sec, group, view, and access)

also see if you can walk the mib manually.
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