Re: [MooseFS-Users] mfs_master正点失去响应

[Davies L. <dav...@gm...>]

This makes more sense, fork() failed, so snapshot is done by the only
one master process.

On Thu, Jul 23, 2015 at 10:29 PM, Jakub Kruszona-Zawadzki
<jak...@ge...> wrote:
> This is caused by check for available memory in Linux. Linux before "fork"
> checks if it's enough memory for "two" copies of forking process (which is
> rather stupid because memory is duplicated in COW mode, so usually both
> processes shares most of their memory). To "fix" this you can change this
> behaviour to "classic" using this command (as root):
>
> echo "1" > /proc/sys/vm/overcommit_memory
>
> On 22 Jul, 2015, at 3:27, 刘亚磊 <liu...@eb...> wrote:
>
> mfs版本：2.0.72社区版
> master、chunkserver、dataserver、client操作系统：centso 5.9 x64
>
> 问题描述：
> 文件数量千万级，发现mfs集群master每到正点会失去响应1-2分钟。master内存、cpu、硬盘、网络监控正常。最开始使用的是1.6.25版本，怀疑软件自身存在bug，后来升级到2.0.72社区版，问题依然存在。以下是正点的错误日志：
>
>
> Jul 22 07:00:00 mfsmaster1 mfsmaster[22443]: fork error (store data in
> foreground - it will block master for a while): ENOMEM (Cannot allocate
> memory)
> Jul 22 07:01:47 mfsmaster1 mfsmaster[22443]: csdb: found cs using ip:port
> and csid (192.168.1.82:9422,5), but server is still connected
> Jul 22 07:01:47 mfsmaster1 mfsmaster[22443]: can't accept chunkserver (ip:
> 192.168.1.82 / port: 9422)
>
> ________________________________
> 刘亚磊 |  买卖宝信息技术有限公司
> 北京市朝阳区红军营南路傲城融富中心C座三层（100012）
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> --
> Regards,
> Jakub Kruszona-Zawadzki
> - - - - - - - - - - - - - - - -
> Segmentation fault (core dumped)
> Phone: +48 602 212 039
>
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-- 
 - Davies