thanks for the replies. I'll check the load on the node that is reported as DOWN/UP. At first glace it does not appear to be overloaded. But, I will dig in deeper, is there a specific indicator on an ubuntu server that would be useful to me?
Also, I didn't make it clear, but in my original post, there are logs from 2 different nodes: 10.21 and 10.25. They are each reporting that the other is DOWN/UP at the same time. Would that still point me to the suggestions you made? I don't see errors in the logs, but I do see a lot of dropped mutations and reads. Any correlation? thanks again, Jason On Tue, Oct 23, 2012 at 12:49 AM, aaron morton <aa...@thelastpickle.com> wrote: > check 10.50.10.21 for what is the system load. > > +1 > > And take a look in the logs on 10.21. > > 10.21 is being seen as down by the other nodes. it could be: > > * 10.21 failing to gossip fast enough, say by being overloaded to in long > ParNew GC pauses. > * This node failing to process gossip fast , say by being overloaded to in > long ParNew GC pauses. > * Problems with the tubes used to connect the nodes. > > (It's probably the first one.) > > Cheers > > ----------------- > Aaron Morton > Freelance Developer > @aaronmorton > http://www.thelastpickle.com > > On 23/10/2012, at 8:19 PM, Jason Wee <peich...@gmail.com> wrote: > > check 10.50.10.21 for what is the system load. > > On Tue, Oct 23, 2012 at 10:41 AM, Jason Hill <jasonhill...@gmail.com> wrote: >> >> Hello, >> >> I'm on version 1.0.11. >> >> I'm seeing this in my system log with occasional frequency: >> >> INFO [GossipTasks:1] 2012-10-23 02:26:34,449 Gossiper.java (line 818) >> InetAddress /10.50.10.21 is now dead. >> INFO [GossipStage:1] 2012-10-23 02:26:34,620 Gossiper.java (line 804) >> InetAddress /10.50.10.21 is now UP >> >> >> INFO [StreamStage:1] 2012-10-23 02:24:38,763 StreamOutSession.java >> (line 228) Streaming to /10.50.10.25 <--this line included for context >> INFO [GossipTasks:1] 2012-10-23 02:26:30,603 Gossiper.java (line 818) >> InetAddress /10.50.10.25 is now dead. >> INFO [GossipStage:1] 2012-10-23 02:26:40,763 Gossiper.java (line 804) >> InetAddress /10.50.10.25 is now UP >> INFO [AntiEntropyStage:1] 2012-10-23 02:27:30,249 >> AntiEntropyService.java (line 233) [repair >> #5a3383c0-1cb5-11e2-0000-56b66459adef] Sending completed merkle tree >> to /10.50.10.25 for (Innovari,TICCompressedLoad) <--this line included >> for context >> >> What is this telling me? Is my network dropping for less than a >> second? Are my nodes really dead and then up? Can someone shed some >> light on this for me? >> >> cheers, >> Jason > > >
