{"id":351,"date":"2012-12-11T21:16:34","date_gmt":"2012-12-11T13:16:34","guid":{"rendered":"http:\/\/blog.nami.idv.tw\/?p=351"},"modified":"2012-12-11T21:17:18","modified_gmt":"2012-12-11T13:17:18","slug":"adodb-nest-loop-tcp-1433-time_wait-flood-issue","status":"publish","type":"post","link":"https:\/\/blog.nami.idv.tw\/?p=351","title":{"rendered":"ADODB nested recordset TCP 1433 TIME_WAIT flood issue"},"content":{"rendered":"<p>\u4eca\u5929\u5728 troubleshooting \u5ba2\u6236\u4e3b\u6a5f\u4e0a\u554f\u984c\u7684\u6642\u5019\uff0c\u4e0d\u7d93\u610f\u5f9e Tcpview \u767c\u73fe\u67d0\u500b\u7cfb\u7d71\u5728\u4f7f\u7528\u8005\u4f7f\u7528\u7684\u6642\u5019\u6703\u5c0d SQL Server \u7522\u751f\u5927\u91cf TIME_WAIT session\uff0c\u9019\u5c0d\u65bc\u81ea\u6211\u8981\u6c42\u7684\u7cfb\u7d71\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u662f\u500b\u4e0d\u80fd\u8996\u800c\u4e0d\u898b\u7684\u7455\u75b5\uff0c\u65bc\u662f\u958b\u59cb\u9032\u884c debug...<\/p>\n<p>\u7d93\u904e\u5169\u500b\u5c0f\u6642\u5206\u6790\u5f8c\uff0c\u767c\u73fe\u4e86\u4e00\u500b\u72c0\u6cc1\uff08\u5148\u770b\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\uff09\uff1a<\/p>\n<pre class=\"brush: vb; title: ; notranslate\" title=\"\">\r\n'\/\/ \u9810\u8a2d Conn \u5df2\u7d93\u5efa\u7acb\r\n\r\n'\/\/ \u7b2c\u4e00\u500b adCmdStoreProc\r\nDim rs1 : Set rs1 = Server.CreateObject(&quot;ADODB.Recordset&quot;)\r\nDim cmd1 : Set cmd1 = Server.CreateObject(&quot;ADODB.Command&quot;)\r\n\r\ncmd1.ActiveConnection = Conn\r\ncmd1.CommandText = &quot;usp_SPNAME1&quot;\r\ncmd1.CommandType = adCmdStoredProc\r\ncmd1.Parameters.Refresh\r\n\r\ncmd1.Parameters(&quot;@Param1&quot;).Value = 1\r\n\r\nSet rs1 = cmd1.Execute\r\n\r\n'\/\/ \u7b2c\u4e8c\u500b adCmdStoreProc\r\nDim rs2 : Set rs2 = Server.CreateObject(&quot;ADODB.Recordset&quot;)\r\nDim cmd2 : Set cmd2 = Server.CreateObject(&quot;ADODB.Command&quot;)\r\n\r\ncmd2.ActiveConnection = Conn\r\ncmd2.CommandText = &quot;usp_SPNAME2&quot;\r\ncmd2.CommandType = adCmdStoredProc\r\ncmd2.Parameters.Refresh\r\n\r\ncmd2.Parameters(&quot;@Param2&quot;).Value = 2\r\n\r\nDo While NOT rs1.EOF\r\n\r\n\tcmd2.Execute\r\n\r\n\trs1.MoveNext\r\nLoop\r\n<\/pre>\n<p>\u9019\u662f\u4e00\u500b loop \u4f46\u662f\u70ba\u5de2\u72c0\u67e5\u8a62\uff0c\u4f9d\u64da rs1 \u53d6\u5f97\u7684 recordset \u57f7\u884c cmd2 \u7684\u67e5\u8a62\uff0c\u4ee5\u4e0a\u7a0b\u5f0f\u78bc\u770b\u8d77\u4f86\u6c92\u6709\u554f\u984c\uff0c\u57f7\u884c\u8d77\u4f86\u4e5f\u4e0d\u6703\u767c\u751f\u932f\u8aa4\uff0c\u4f46\u662f\u6703\u7522\u751f\u7b49\u540c\u65bc recordset count \u6578\u91cf\u7684 TCP TIME_WAIT session\uff0c\u95dc\u9375\u5728\u65bc <strong>Conn (Connection) \u88ab\u62ff\u4f86\u7528\u4e86\u5169\u6b21 (cmd1.ActiveConnection &amp; cmd2.ActiveConnection)<\/strong>\uff0c\u5373\u4fbf\u5728\u7b2c\u4e8c\u6b21\u8a2d\u5b9a\u7d66 cmd2\u524d Set cmd1 = Nothing \u4e5f\u6c92\u7528\uff0c\u4e00\u6a23\u6703\u9020\u6210 cmd2 \u5728\u4f5c\u52d5\u6642\u7522\u751f TIME_WAIT\u00a0 \u3002 (CommandType = adCmdStoredProc \u6642\u5728\u8a2d\u5b9aParameters \u503c\u7684\u6642\u5019\u5c31\u6703\u7522\u751f TIME_WAIT\uff0cCommandType = adCmdText \u6642\u5728 Execute \u6642\u6703\u7522\u751f TIME_WAIT)<\/p>\n<p>\u800c\u9019\u500b issue \u7684\u89e3\u6c7a\u8fa6\u6cd5\u662f\uff1a<\/p>\n<p>\u6bcf\u500b ActiveConnection \u90fd\u7d66\u4ed6\u4e00\u500b\u7368\u7acb\u7684 Connection object<\/p>\n<p>\u5ef6\u4f38\u95b1\u8b80\uff1a<\/p>\n<p><a href=\"http:\/\/blogs.msdn.com\/b\/spike\/archive\/2008\/09\/17\/nested-recordset-and-the-port-socket-in-time-wait-problem-by-example.aspx\">Nested RecordSet and the port\/socket in TIME_WAIT problem by example.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5929\u5728 troubleshooting \u5ba2\u6236\u4e3b\u6a5f\u4e0a\u554f\u984c\u7684\u6642\u5019\uff0c\u4e0d\u7d93\u610f\u5f9e Tcpv &hellip; <a href=\"https:\/\/blog.nami.idv.tw\/?p=351\">\u95b1\u8b80\u5168\u6587 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5],"tags":[34],"class_list":["post-351","post","type-post","status-publish","format-standard","hentry","category-web-technology","tag-asp"],"_links":{"self":[{"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/351","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=351"}],"version-history":[{"count":8,"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/351\/revisions"}],"predecessor-version":[{"id":359,"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/351\/revisions\/359"}],"wp:attachment":[{"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.nami.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}