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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    robison Wed 11 05 2014 15 42 Normal topic Modelling devices from collectors fails by Sudz Wed 12 16 2015 06 48 0 by Sudz Wed 12 16 2015 06 48 Normal topic Network Map by Guthos Fri 08 22 2014 07 01 0 by Guthos Fri 08 22 2014 07 01 Normal topic WInRM Support by Jtsai Mon 04 27 2015 19 03 0 by Jtsai Mon 04 27 2015 19 03 Normal topic Makeup Dev Hours at 4pm Central by Trelane Wed 01 28 2015 14 13 0 by Trelane Wed 01 28 2015 14 13 Normal topic Unable to start Redis service by Danielezenoss Mon 06 22 2015 05 01 0 by Danielezenoss Mon 06 22 2015 05 01 Normal topic Today s Dev Hour by Trelane Mon 01 19 2015 08 42 0 by Trelane Mon 01 19 2015 08 42 Normal topic Adding editing device interface descriptions by Gregg hughes Thu 02 19 2015 10 48 0 by Gregg hughes Thu 02 19 2015 10 48 Normal topic Another Error processing transform mapping on Event Class Status instances IISSiteStatus by Crzyfleming Tue 06 16 2015 13 19 0 by Crzyfleming Tue 06 16 2015 13 19 Normal topic Predictive Thresholding by Trelane Fri 03 07 2014 13 03 0 by Trelane Fri 03 07 2014 13 03 Normal topic Zenoss monitoring oVirt engine with oVirt zenpack by Gilevichalex Thu 09 24 2015 07 13 0 by Gilevichalex Thu 09 24 2015 07 13 Normal topic Missing graphs with WMI monitoring by Mistersparky Thu 01 08 2015 16 30 0 by Mistersparky Fri 01 09 2015 04 11 Normal topic After enable watchdog cannot see Performing periodic maintenance by QnA Thu 03 27 2014 04 25 0 by QnA Thu 03 27 2014 04 25 Normal

    Original URL path: http://www.zenoss.org/forums/community-zenoss-support?destination=forum/15&order=comment_count&sort=asc (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    topic Can t delete device connection refused by Lconnell Thu 01 02 2014 12 32 8 by Flyingfish007 Fri 01 10 2014 03 47 Normal topic Email Troubleshooting by Lconnell Wed 01 08 2014 14 33 4 by Trelane Mon 01 13 2014 09 15 Normal topic Active Directory Authentication by Lconnell Wed 01 08 2014 17 53 7 by Lconnell Mon 01 13 2014 14 20 Normal topic all daemon showed as down in porlet but running in Daemon page error ZepConnectionError Could not connect to service by QnA Tue 01 14 2014 03 44 8 by Hydruid Wed 01 15 2014 14 51 Normal topic graph traffic volume by Nachofw Fri 01 17 2014 09 11 1 by Nachofw Mon 01 20 2014 07 00 Normal topic Heartbeat Failure error occurring for Zenoss components by Mahendra gupta Mon 01 20 2014 01 53 1 by Jcurry Mon 01 20 2014 11 35 Normal topic How to disable specific alarms by Handsy Thu 01 16 2014 12 21 3 by Trelane Mon 01 20 2014 11 48 Normal topic Searching forums by Nomadd Thu 01 16 2014 07 16 1 by Trelane Mon 01 20 2014 12 06 Normal topic Question on how zenoss handles incoming events Zenoss on Ubuntu by CCC Sun 01 19 2014 03 25 1 by Jcurry Mon 01 20 2014 12 12 Normal topic Zenoss and DNS IP refresh by Sashi Fri 01 17 2014 00 35 1 by Jcurry Mon 01 20 2014 12 39 Normal topic File systems not showing Used Bytes Free Bytes or util by Reidkersey Thu 01 16 2014 21 13 1 by Jcurry Mon 01 20 2014 12 48 Normal topic Devices now missing zSnmpCommunity by Residentbiscuit Tue 01 07 2014 15 59 1 by Jcurry Mon 01

    Original URL path: http://www.zenoss.org/forums/community-zenoss-support?destination=forum/15&order=last_updated&sort=asc (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    1 7 3 Submitted by Jcurry on Mon 01 04 2016 12 43 Forums ZenPack Development Zenoss Core 4 2 5 SUP 457 I am writing a ZenPack that uses the PythonCollector 1 7 3 and creates a dsplugin in fact 3 dsplugins I have 2 test devices very similar both have the same templates bound that use these dsplugins one is a device template 2 are component Email jane

    Original URL path: http://www.zenoss.org/tags/pythoncollector-173?destination=taxonomy/term/39206 (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    of any PythonDataSourcePlugin is called The timer is cancelled as soon as that collect method returns If the timer reaches blockingtimeout before the collect method returns the zenpython process completely restarts itself with the plugin that failed to return in time disabled This may sound extreme but for technical reasons was really the only way to recover from being blocked To understand why zenpython must restart itself you have to understand how zenpython is a single threaded process that uses asynchronous IO via the Twisted library to efficiently perform lots of parallel collection Anytime non asynchronous code is being executed it means that no other collection or process can be performed until it yields back to the reactor Twisted s event loop The catch here is that zenpython is executing arbitrary code provided by ZenPacks The zenpython code essentially gives up control to that ZenPack code as soon as it calls it until that code returns The way that zenpython manages to restart itself when it calls to ZenPack code that doesn t return is by running a watchdog thread that keeps an eye on that timer and restarts the process if it expires So another question you d ask and I think you implied is why disable the plugin for 2 devices when it only timed out on 1 device To understand why that is done you have to imagine a scenario where you have a plugin that executes on all Linux servers Let s say you have 1 000 Linux servers being monitored and let s say that 50 of them develop some condition that causes the plugin to block on them for 10 seconds Assuming it takes zenpython only 1 minute to restart when monitoring 1 000 servers it would take 60 seconds 10 seconds 50 servers or 11 minutes before zenpython would have all of the plugin device executions disabled During this time zenpython wouldn t be doing anything So we re forced to assume that if a plugin blocks once that it s not written correctly and using blocking IO So the plugin is completely disabled for all devices that use it So now back to why the default blockingtimeout is set to 5 which may seem way too low given everything above To understand this you again have to understand why the PythonDataSourcePlugin collect method must return a Deferred After all it s easy to imagine making an API call to some application that takes more than 5 seconds When using Twisted s non blocking networking APIs you immediately get a Deferred object returned when you make a call like getPage http example com api really slow thing even if the response doesn t come back for 10 minutes When the response comes back the Deferred s callback or errback if there s an error is called The PythonDataSourcePlugin collect must do the same thing Usually by returning the Deferred object that something like getPage http returned to you If you properly use Twisted

    Original URL path: http://www.zenoss.org/forum/136876?destination=node/136876%3Fpage%3D0 (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    3 by Jcurry Tue 12 29 2015 16 48 Normal topic Updating PythonCollector ZenPack 1 6 0 1 7 3 seems to break things by Jcurry Wed 12 09 2015 14 33 4 by Jcurry Tue 12 29 2015 05 36 Normal topic Troubles with visualisation of fields and graphs by Mori Thu 12 03 2015 10 36 0 by Mori Fri 12 18 2015 09 47 Normal topic Quirky

    Original URL path: http://www.zenoss.org/forums/zenpack-development?order=title&sort=desc (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    15 43 2 Jcurry Offline Last seen 7 hours 15 min ago Joined 01 02 2014 13 04 Posts 132 My understanding is that My understanding is that zenpacklib is still the answer But there is so little relevant documentation on ZenPacks in 5 that it is difficult to progress I strongly suggest that development still be done on 4 2 5 and once developed and tested move it to 5 So far I have a reasonbly good success rate this way Cheers Jane Email jane curry skills 1st co uk Web http www skills 1st co uk Top Log in to post comments Tue 12 29 2015 14 52 3 Jenkinsk007 Offline Last seen 4 hours 27 min ago Joined 12 14 2014 19 09 Posts 152 Thanks for the information That is our current plan but it is not good to keep two different versions of Zenoss running where we develop on 4 2 5 and move the ZenPacks to 5 It is best to work on like version platforms Top Log in to post comments Tue 12 29 2015 16 48 4 Jcurry Offline Last seen 7 hours 15 min ago Joined 01 02 2014 13 04

    Original URL path: http://www.zenoss.org/comment/22246 (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    got around to updating my PythonCollector from 1 6 0 to 1 7 3 and I now have 2 different events one from one of my ZPs and one from the AWS ZP saying EC2VPCSubnet IPAddressesCount datasource has been disabled Anyone else seen this or know what s going on Cheers Jane Email jane curry skills 1st co uk Web http www skills 1st co uk Read more about Updating

    Original URL path: http://www.zenoss.org/tags/pythoncollector (2016-01-08)
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  • Zenoss Community - Open Source Network Monitoring and Systems Management
    comments Fri 12 11 2015 04 16 2 Jcurry Offline Last seen 7 hours 15 min ago Joined 01 02 2014 13 04 Posts 132 The datasource has been The datasource has been disabled events come from new warchdog functionality being introduced with 1 7 1 2 3 It is documented under the blockingtimeout parameter above but I think this needs to be made much more obvious Basically if there is no response within blockingtimeout default 5s then the plugin is PERMANENTLY disabled It also fills up zenpython log and zenhub log with messages Once a plugin is blocked it will remain permanently blocked until its name is removed from either var zenoss zenpython blocked on Zenoss 5 or opt zenoss var zenpython blocked on Zenoss 4 Cheers Jane Email jane curry skills 1st co uk Web http www skills 1st co uk Top Log in to post comments Thu 12 17 2015 08 00 3 Jstanley Offline Last seen 3 weeks 14 hours ago Joined 07 10 2014 09 31 Posts 67 Whoa whoa really Have you Whoa whoa really Have you found a way to disable this completely I was just about to test updating to the newer version in our lab Top Log in to post comments Thu 12 17 2015 08 56 4 Jcurry Offline Last seen 7 hours 15 min ago Joined 01 02 2014 13 04 Posts 132 Nope You can set Nope You can set blockingtimeout to something very big I assume but not tried it I really think this update needs a very large obvious notice not a detail buried in what I initially thought was an irrelevant parameter Incidentally this change has locked out a couple of the AWS ZenPack plugins even when I have upped the timeout from 5 to

    Original URL path: http://www.zenoss.org/comment/22081 (2016-01-08)
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