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Date: Fri, 13 Aug 2010 11:54:33 -0700
Message-ID: <AANLkTi=zSbqGD4g42ZgU9pRu-PP0M7NS9OyAVJwpNbYq@mail.gmail.com>
Subject: Re: Fw: namenode crash
From: Jean-Daniel Cryans <jdcryans@apache.org>
To: user@hbase.apache.org
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u18 should never be used.

You say it's crashing on both u17 and u20? How is it crashing? (it's
kind of a vague word)

Here with use both u14 and u17 on 20 nodes clusters without any issue.

J-D

On Fri, Aug 13, 2010 at 11:27 AM, Jinsong Hu <jinsong_hu@hotmail.com> wrote=
:
>
>
> Hi, There:
> =A0does anybody know of a good combination of centos version and jdk vers=
ion that works stably ? I am using centos version
>
> Linux =A02.6.18-194.8.1.el5.centos.plus #1 SMP Wed Jul 7 11:45:38 EDT 201=
0
> =A0x86_64 x86_64 x86_64 GNU/Linux
>
> jdk version
> Java(TM) SE Runtime Environment (build 1.6.0_17-b04)
> Java HotSpot(TM) 64-Bit Server VM (build 14.3-b01, mixed mode)
>
> and run the namenode with the following jvm config
> -Xmx1000m =A0-XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+Disable=
ExplicitGC -XX:+HeapDumpOnOutOfMemoryError -XX:+UseCompressedOops -XX:+DoEs=
capeAnalysis -XX:+AggressiveOpts =A0-Xmx2G
>
> but it crashed silently after 16 hours.
>
> I used jdk
> Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
> Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01, mixed mode)
>
> with the same jvm config, and the namenode crashed in about 1 week. I sea=
rched internet and people say 1.6.0_18 is not good.
> but does anybody can recommend a good combination of jdk and os version t=
hat can run stably ?
>
>
> This crashing problem doesn't happen with a small cluster of 4 datanodes.=
 but it happens with a cluster of 17 datanodes.
>
> Jimmy.
>
>
>