估计是你的全量数据太大,但是 join 节点处理性能太慢,导致半小时内全量数据还没有处理完,而 checkpoint 超时了。 注意全量数据阶段,是做不了 checkpoint 的。 具体可以看下这篇文章的第四点。 https://mp.weixin.qq.com/s/Mfn-fFegb5wzI8BIHhNGvQ
解决办法文中也有提及: 解决办法:在 flink-conf.yaml 配置 failed checkpoint 容忍次数,以及失败重启策略,如下: execution.checkpointing.interval: 10min # checkpoint间隔时间 execution.checkpointing.tolerable-failed-checkpoints: 100 # checkpoint 失败容忍次数 restart-strategy: fixed-delay # 重试策略 restart-strategy.fixed-delay.attempts: 2147483647 # 重试次数 Best, Jark On Wed, 18 Nov 2020 at 11:28, 丁浩浩 <[email protected]> wrote: > 即使我将not > exists改成了join,join节点的checkpoint也无法完成,是我设置的checkpint时间太短了嘛,我设置的是每隔半小时发起checkpoint一次,超时时间也是半小时。 > 下面是截图,(我上传图片每次都看不了啥情况) > https://imgchr.com/i/DeqixU > https://imgchr.com/i/DeqP2T > > > 在 2020年11月16日,上午10:29,Jark Wu <[email protected]> 写道: > > > > 瓶颈应该在两个 not exists 上面,not exists 目前只能单并发来做,所以无法水平扩展性能。 > > 可以考虑把 not exists 替换成其他方案,比如 udf,维表 join。 > > > > Best, > > Jark > > > > On Mon, 16 Nov 2020 at 10:05, 丁浩浩 <[email protected]> wrote: > > > >> select > >> ri.sub_clazz_number, > >> prcrs.rounds, > >> count(*) as num > >> from > >> subclazz gs > >> JOIN > >> (SELECT gce.number, min( gce.extension_value ) AS grade FROM > >> course_extension gce WHERE gce.isdel = 0 AND gce.extension_type = 4 > GROUP > >> BY gce.number) AS temp > >> ON > >> temp.number = gs.course_number AND temp.grade>30 > >> JOIN > >> right_info ri > >> ON > >> gs.number = ri.sub_clazz_number > >> join > >> wide_subclazz ws > >> on > >> ws.number = ri.sub_clazz_number > >> join > >> course gc > >> on > >> gc.number = ws.course_number and gc.course_category_id in (30,40) > >> left join > >> performance_regular_can_renewal_sign prcrs > >> on prcrs.order_number = ri.order_number and prcrs.rounds in (1,2) > >> where ri.is_del = 0 and ri.end_idx = -1 and prcrs.rounds is not null > >> and not exists (select 1 from internal_staff gis where gis.user_id = > >> ri.user_id) > >> and not exists (select 1 from clazz_extension ce where ws.clazz_number = > >> ce.number > >> and ce.extension_type = 3 and ce.isdel = 0 > >> and ce.extension_value in (1,3,4,7,8,11)) > >> group by ri.sub_clazz_number, prcrs.rounds > >> Sql代码是这样的。 > >> 瓶颈在所有的join节点上,每次的checkpoint无法完成的节点都是join节点。 > >> > >>> 在 2020年11月14日,下午5:53,Jark Wu <[email protected]> 写道: > >>> > >>> 能展示下你的代码吗?是用的维表关联的语法 (FOR SYSTEM TIME AS OF)? > >>> 需要明确下,到底是什么节点慢了。 > >>> > >>> On Fri, 13 Nov 2020 at 19:02, 丁浩浩 <[email protected]> wrote: > >>> > >>>> 我用flink cdc 对mysql的表进行关联查询,发现flink只能两张表关联之后再跟下一张表关联,导致最后落库的延迟非常大。 > >>>> 有没有比较好的优化方案能缓解这样的问题? > >> > >> > >> > > >
