{"id":10814,"date":"2023-10-16T09:23:29","date_gmt":"2023-10-16T01:23:29","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=10814"},"modified":"2025-07-16T14:54:07","modified_gmt":"2025-07-16T06:54:07","slug":"%e5%85%b3%e4%ba%8e-topo-check-failed-mapred-tasks-exceed-1000000000-%e6%8a%a5%e9%94%99%e7%9a%84%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=10814","title":{"rendered":"sql\u5e38\u89c1\u62a5\u9519\u4e4b Topo check failed. Mapred tasks exceed 1000000000"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<hr \/>\n<p>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u6267\u884c inceptor sql \u62a5\u9519<code>Topo check failed. Mapred tasks exceed 1000000000<\/code>\u7684\u6392\u67e5\u601d\u8def\u548c\u89e3\u51b3\u529e\u6cd5\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/09\/image-1693963611799.png\" alt=\"file\" \/><\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<p>\u5ba2\u6237\u5728\u5bf9\u8868\u6267\u884c<code>group by<\/code>\u67e5\u8be2\u65f6\uff0c\u62a5\u9519<code>Topo check failed. Mapred tasks exceed 1000000000<\/code>\uff0cDBAService\u9875\u9762\u5e76\u672a\u751f\u6210\u5bf9\u5e94\u7684task\u6570\u76ee\u76f8\u5173\u4fe1\u606f\u3002<\/p>\n<h4>\u6392\u67e5\u601d\u8def<\/h4>\n<ol>\n<li>\u67e5\u770b\u5efa\u8868\u8bed\u53e5\uff0c\u8be5\u8868\u662f\u4e00\u4e2a\u8303\u56f4\u5206\u533aorc\u4e8b\u52a1\u8868\uff0c\u5206\u533a\u5b57\u6bb5<code>sk_period<\/code>\uff0c\u6bcf\u4e2a\u5206\u533a1999\u4e2a\u5206\u6876<\/li>\n<li>\u6267\u884c<code>analyze<\/code>\u5206\u6790\uff0c\u53ef\u4ee5\u770b\u5230\u5b58\u572821\u4e2a\u5206\u533a\u4e0b\u67091999\u4e2a\u5206\u6876\u3002\u8fd9\u548c\u5168\u8868count\u67e5\u8be2\u768421*1999=41979 \u4e2atask\u6570\u76ee\u4e00\u81f4<\/li>\n<li>\u901a\u5e38\u6765\u8bf4\uff0c<code>group by<\/code> \u805a\u5408\u67e5\u8be2DAG\u4f1a\u751f\u62102\u4e2astage\uff0c\u4e00\u4e2a\u662fmap stage\u4e00\u4e2areduce stage\uff0cmap task\u6570\u91cf\u4e3a41979\uff0creduce task\u6570\u91cf\uff0c\u4e00\u822c\u662f\u7531map task\u6570\u91cf\u548c<code>hive.groupby.aggregateratio<\/code> \u53c2\u6570\u51b3\u5b9a\u7684\uff0c\u8be5\u53c2\u6570\u9ed8\u8ba4\u662f0.6\uff0c\u4e5f\u5c31\u662f\u8bf4reduce task\u6570\u76ee\u4e3a41979 * 0.6 = 25187.4<\/li>\n<\/ol>\n<p>\u8fd9\u91cc\u6211\u4eec\u79d1\u666e\u4e00\u4e0b<code>ngmr.topo.mapred.limit<\/code>\u8fd9\u4e2a\u53c2\u6570\uff0c\u8be5\u53c2\u6570\u8868\u793a <strong>\u4efb\u610f\u4e24\u4e2aStage\u4e4b\u95f4Map\u6570\u91cf\u548cReduce\u6570\u91cf\u4e58\u79ef\uff0c\u5982\u679c\u5927\u4e8e\u8fd9\u4e2a\u503c\u5219\u4f1a\u62a5\u9519\uff0c\u9ed8\u8ba4\u503c\uff1a1000000000<\/strong>, \u5728\u4e0a\u8ff0\u6392\u67e5\u601d\u8def\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cmap\u6570\u91cf\u548creduce\u6570\u91cf\u4e58\u79ef\u4e3a <code>41979*(41979\u00a0* 0.6)=1057341864.6<\/code> \u8fd9\u4e2a\u503c\u662f\u5927\u4e8e1000000000\u7684\uff0c\u6240\u4ee5\u4f1a\u89e6\u53d1\u62a5\u9519\u3002<\/p>\n<h4>\u89e3\u51b3\u65b9\u6848\uff1a\u8ba1\u7b97\u7aefmap\u5408<\/h4>\n<blockquote>\n<p>\u4e0d\u5efa\u8bae\u5168\u5c40\u8c03\u5927<code>ngmr.topo.mapred.limit<\/code>\uff0c\u8fd9\u4e2a\u53c2\u6570\u5982\u679c\u8d85\u8fc7\u4e86\u9ed8\u8ba4\u9608\u503c\uff0cInceptor Server\u4f1a\u6709\u6bd4\u8f83\u4e25\u91cd\u7684\u5185\u5b58\u95ee\u9898\u3002<\/p>\n<\/blockquote>\n<p>\u5982\u679c\u6e90\u8868\u662ftextfile\/orc\u975e\u4e8b\u52a1\u8fd9\u4e9b\u8868\u7c7b\u578b\uff0c\u53ef\u4ee5\u91c7\u7528\u5c0f\u6587\u4ef6\u5408\u5e76\u53c2\u6570\uff0c\u5bf9map\u9636\u6bb5task\u6570\u76ee\u8f83\u591a\u7684\u8868\u8fdb\u884c\u5c0f\u6587\u4ef6\u5408\u5e76\u964d\u4f4emap\u6570\u91cf\uff1b<\/p>\n<pre><code class=\"language-sql\">set inceptor.automerge.maptask = true;\nset ngmr.partition.mergesize.mb = 100;<\/code><\/pre>\n<p>\u5982\u679c\u662forc\u4e8b\u52a1\u8868\uff0c\u8003\u8651\u662f\u5426\u53ef\u4ee5\u51cf\u5c11\u5206\u6876\u6570\uff0c\u6216\u8005\u4f7f\u7528\u66f4\u52a0\u5408\u7406\u7684\u5206\u533a\u65b9\u5f0f\u51cf\u5c11\u5206\u533a\u6570\uff1b<\/p>\n<p>\u5982\u679c\u662fholodesk\u8868\uff0c\u53ef\u4ee5\u5f00\u542f\u5408\u5e76\u53c2\u6570 <code>SET holodesk.automerge.enabled=true;<\/code> \uff08\u7ed3\u5408\u5176\u4ed6\u5408\u5e76\u53c2\u6570\u4e00\u8d77\u4f7f\u7528\uff09\uff0c\u6216\u8005\u5c1d\u8bd5\u624b\u52a8compact (<code>alter table table_name compact &#039;full&#039; and wait;<\/code>\uff0c\u518d\u5230DBAService\u68c0\u67e5\u4e0bholodesk\u5c0f\u6587\u4ef6\u7684\u6570\u91cf\u662f\u5426\u51cf\u5c11)\uff1b<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 \u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u6267\u884c inceptor sql \u62a5\u9519Topo check failed. Mapred  ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=10814\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[],"class_list":["post-10814","post","type-post","status-publish","format-standard","hentry","category-sql_issue"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/10814","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10814"}],"version-history":[{"count":4,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/10814\/revisions"}],"predecessor-version":[{"id":16889,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/10814\/revisions\/16889"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}