Hi, Thanks for all your help. Are there any other insights?
Best Lu On Wed, Aug 30, 2023 at 11:29 AM Lu Niu <qqib...@gmail.com> wrote: > No. we don't use yarn.taskmanager.node-label > > Best > Lu > > On Tue, Aug 29, 2023 at 12:17 AM Geng Biao <biaoge...@gmail.com> wrote: > >> Maybe you can check if you have set yarn.taskmanager.node-label for some >> flink jobs? >> >> Best, >> Biao Geng >> >> 发送自 Outlook for iOS <https://aka.ms/o0ukef> >> ------------------------------ >> *发件人:* Chen Zhanghao <zhanghao.c...@outlook.com> >> *发送时间:* Tuesday, August 29, 2023 12:14:53 PM >> *收件人:* Lu Niu <qqib...@gmail.com>; Weihua Hu <huweihua....@gmail.com> >> *抄送:* Kenan Kılıçtepe <kkilict...@gmail.com>; user <user@flink.apache.org >> > >> *主题:* Re: Uneven TM Distribution of Flink on YARN >> >> CCing @Weihua Hu <huweihua....@gmail.com> , who is an expert on this. Do >> you have any ideas on the phenomenon here? >> >> Best, >> Zhanghao Chen >> ------------------------------ >> *From:* Lu Niu <qqib...@gmail.com> >> *Sent:* Tuesday, August 29, 2023 12:11:35 PM >> *To:* Chen Zhanghao <zhanghao.c...@outlook.com> >> *Cc:* Kenan Kılıçtepe <kkilict...@gmail.com>; user <user@flink.apache.org >> > >> *Subject:* Re: Uneven TM Distribution of Flink on YARN >> >> Thanks for your reply. >> >> The interesting fact is that we also managed spark on yarn. However. Only >> the flink cluster is having the issue. I am wondering whether there is a >> difference in the implementation on flink side. >> >> Best >> Lu >> >> On Mon, Aug 28, 2023 at 8:38 PM Chen Zhanghao <zhanghao.c...@outlook.com> >> wrote: >> >> Hi Lu Niu, >> >> TM distribution on YARN nodes is managed by YARN RM and is out of the >> scope of Flink. On the other hand, cluster.evenly-spread-out-slots forces >> even distribution of tasks among Flink TMs, and has nothing to do with your >> concerns. Also, the config currently only supports Standalone mode Flink >> clusters, and does not take effect on a Flink cluster on YARN. >> >> Best, >> Zhanghao Chen >> ------------------------------ >> *发件人:* Lu Niu <qqib...@gmail.com> >> *发送时间:* 2023年8月29日 4:30 >> *收件人:* Kenan Kılıçtepe <kkilict...@gmail.com> >> *抄送:* user <user@flink.apache.org> >> *主题:* Re: Uneven TM Distribution of Flink on YARN >> >> Thanks for the reply. We've already set cluster.evenly-spread-out-slots = >> true >> >> Best >> Lu >> >> On Mon, Aug 28, 2023 at 1:23 PM Kenan Kılıçtepe <kkilict...@gmail.com> >> wrote: >> >> Have you checked config param cluster.evenly-spread-out-slots ? >> >> >> On Mon, Aug 28, 2023 at 10:31 PM Lu Niu <qqib...@gmail.com> wrote: >> >> Hi, Flink users >> >> We have recently observed that the allocation of Flink TaskManagers in >> our YARN cluster is not evenly distributed. We would like to hear your >> thoughts on this matter. >> >> 1. Our setup includes Flink version 1.15.1 and Hadoop 2.10.0. >> 2. The uneven distribution is that out of a 370-node YARN cluster, there >> are 16 nodes with either 0 or 1 vCore available, while 110 nodes have more >> than 10 vCores available. >> >> Is such behavior expected? If not, is there a fix provided in Flink? >> Thanks! >> >> Best >> Lu >> >>
