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Date: Thu, 10 Nov 2011 07:22:47 -0800 (PST)
From: Andrew Purtell <apurtell@apache.org>
Reply-To: Andrew Purtell <apurtell@apache.org>
Subject: Re: HBase 0.92/Hadoop 0.22 test results
To: "dev@hbase.apache.org" <dev@hbase.apache.org>
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>=A0That's a small cluster running on EC2.=A0=0A=0AWhat instance type?=0A=
=0AShould use c1.xlarge or m4.4xlarge, they won't see the possibility of no=
isy neighbors.=0A=0ABest regards,=0A=0A=A0 =A0 - Andy=0A=0AProblems worthy =
of attack prove their worth by hitting back. - Piet Hein (via Tom White)=0A=
=0A>________________________________=0A>From: Roman Shaposhnik <rvs@apache.=
org>=0A>To: dev@hbase.apache.org=0A>Sent: Tuesday, November 8, 2011 5:29 PM=
=0A>Subject: Re: HBase 0.92/Hadoop 0.22 test results=0A>=0A>On Tue, Nov 8, =
2011 at 2:06 PM, Stack <stack@duboce.net> wrote:=0A>> What happened above b=
etween 00:43:40 and 00:44:31?=0A>=0A>Not much judging by the logs. In fact =
that's part of the issue here I think.=0A>=0A>> A big old GC?=0A>=0A>Unlike=
ly -- the RS had tons of Heap, but of course anything's possible.=0A>=0A>> =
This is a standalone instance with all running in the on VM?=0A>=0A>That's =
a small cluster running on EC2. So at the very fundamental levels=0A>these =
are VMs, yes. But for all practical purposes -- it is a fully distributed=
=0A>standalone set of servers.=0A>=0A>> The YouAreDeadException happens usu=
ally when the master has figured=0A>> the RegionServer is dead before the R=
egionServer has figured it out.=0A>> This can happen when say, the RS has G=
C paused and first thing it does=0A>> when it comes out of the pause is it =
heartbeats the master (Meantime=0A>> its probably running the zookeeper ses=
sion expiration code=0A>> concurrently).=0A>=0A>Right. I'll try to look int=
o that in my testing. I also bumped to the timeout=0A>up to a minute (which=
 I'm really nervous about, though). Lets see...=0A>=0A>Thanks,=0A>Roman.=0A=
>=0A>=0A>=A0