{"id":206380,"date":"2025-06-12T08:34:56","date_gmt":"2025-06-12T00:34:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206380\/"},"modified":"2025-06-12T08:34:56","modified_gmt":"2025-06-12T00:34:56","slug":"go-%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e6%ad%bb%e9%94%81%e9%94%99%e8%af%af%ef%bc%9a%e6%89%80%e6%9c%89%e5%8d%8f%e7%a8%8b%e4%bc%91%e7%9c%a0%e5%af%bc%e8%87%b4%e7%a8%8b%e5%ba%8f%e5%b4%a9%e6%ba%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206380\/","title":{"rendered":"Go \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f"},"content":{"rendered":"

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300aGo \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGOLANG<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span>,
\n,
\ngo \u8bed\u8a00\u4e2d\u7684\u81f4\u547d\u6b7b\u9501\u9519\u8bef\uff08fatal error: all goroutines are asleep – deadlock!\uff09<\/strong>,\u6211\u4eec\u7f16\u5199\u4e86\u4e00\u4e2a go \u8bed\u8a00\u7a0b\u5e8f\u6765\u5904\u7406\u4e00\u4e2a\u901a\u9053\uff1a,\u6267\u884c\u8be5\u7a0b\u5e8f\u65f6\uff0c\u6211\u4eec\u5f97\u5230\u4ee5\u4e0b\u9519\u8bef\uff1a,\u9519\u8bef\u4fe1\u606f\u8868\u660e\u6240\u6709\u534f\u7a0b\u90fd\u5df2\u8fdb\u5165\u4f11\u7720\u72b6\u6001\uff0c\u5bfc\u81f4\u6b7b\u9501\u3002,\u4e3a\u4e86\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u5173\u95ed\u901a\u9053 foo6chan\uff1a,\u5173\u95ed\u901a\u9053\u540e\uff0cfoo6 \u51fd\u6570\u4e2d\u7684 for \u5faa\u73af\u5c06\u9000\u51fa\uff0c\u534f\u7a0b\u5c06\u91ca\u653e\u5e76\u91ca\u653e\u6b7b\u9501\u3002,\u8bf7\u6ce8\u610f\uff0c\u53e6\u4e00\u90e8\u5206\u7a0b\u5e8f\u901a\u8fc7\u4f7f\u7528 go \u5173\u952e\u5b57\u542f\u52a8 foo6 \u51fd\u6570\u6765\u907f\u514d\u6b7b\u9501\uff1a,\u8fd9\u662f\u56e0\u4e3a go \u5173\u952e\u5b57\u5c06 foo6 \u51fd\u6570\u542f\u52a8\u4e3a\u4e00\u4e2a\u5355\u72ec\u7684\u534f\u7a0b\uff0c\u5b83\u4e0e\u4e3b\u534f\u7a0b\u5206\u79bb\u5e76\u72ec\u7acb\u8fd0\u884c\uff0c\u56e0\u6b64\u4e0d\u4f1a\u5bfc\u81f4\u6b7b\u9501\u3002,\u672c\u7bc7\u5173\u4e8e\u300aGo \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,go \u8bed\u8a00\u4e2d\u7684\u81f4\u547d\u6b7b\u9501\u9519\u8bef\uff08fatal error: all goroutines are asleep – deadlock!\uff09,
\n\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300aGo \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGOLANG<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span>,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f<\/span><\/p>\n

Go \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f<\/h1>\n

2024-11-10 22:18:59<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300aGo \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGOLANG<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n

<\/p>\n

go \u8bed\u8a00\u4e2d\u7684\u81f4\u547d\u6b7b\u9501\u9519\u8bef\uff08fatal error: all goroutines are asleep – deadlock!\uff09<\/strong><\/p>\n

\u6211\u4eec\u7f16\u5199\u4e86\u4e00\u4e2a go \u8bed\u8a00\u7a0b\u5e8f\u6765\u5904\u7406\u4e00\u4e2a\u901a\u9053\uff1a<\/p>\n

package main\n\nimport (\n    \"fmt\"\n    \"time\"\n)\n\nvar (\n    foo6chan = make(chan int, 10)\n)\n\nfunc foo6() {\n    for val := range foo6chan {\n        go func() {\n            fmt.printf(\"foo6 val = %d\\n\", val)\n        }()\n    }\n}\n\nfunc main() {\n    foo6chan <- 1\n    foo6chan <- 2\n    foo6chan <- 3\n    foo6chan <- 5\n    foo6()\n}<\/pre>\n
\u6267\u884c\u8be5\u7a0b\u5e8f\u65f6\uff0c\u6211\u4eec\u5f97\u5230\u4ee5\u4e0b\u9519\u8bef\uff1a<\/p>\n
foo6 val = 5\nfoo6 val = 5\nfoo6 val = 5\nfoo6 val = 5\nfatal error: all goroutines are asleep - deadlock!\n\ngoroutine 1 [chan receive]:\nmain.foo6()\n    \/users\/plsof\/4.go:13 +0x94\nmain.main()\n    \/users\/plsof\/4.go:25 +0x96\nexit status 2<\/pre>\n
\u9519\u8bef\u4fe1\u606f\u8868\u660e\u6240\u6709\u534f\u7a0b\u90fd\u5df2\u8fdb\u5165\u4f11\u7720\u72b6\u6001\uff0c\u5bfc\u81f4\u6b7b\u9501\u3002<\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u5173\u95ed\u901a\u9053 foo6chan\uff1a<\/p>\n
...\nfoo6chan <- 5\nclose(foo6chan) \/\/ \u5173\u95ed\u901a\u9053\nfoo6()<\/pre>\n
\u5173\u95ed\u901a\u9053\u540e\uff0cfoo6 \u51fd\u6570\u4e2d\u7684 for \u5faa\u73af\u5c06\u9000\u51fa\uff0c\u534f\u7a0b\u5c06\u91ca\u653e\u5e76\u91ca\u653e\u6b7b\u9501\u3002<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u53e6\u4e00\u90e8\u5206\u7a0b\u5e8f\u901a\u8fc7\u4f7f\u7528 go \u5173\u952e\u5b57\u542f\u52a8 foo6 \u51fd\u6570\u6765\u907f\u514d\u6b7b\u9501\uff1a<\/p>\n
...\ngo foo6()<\/pre>\n
\u8fd9\u662f\u56e0\u4e3a go \u5173\u952e\u5b57\u5c06 foo6 \u51fd\u6570\u542f\u52a8\u4e3a\u4e00\u4e2a\u5355\u72ec\u7684\u534f\u7a0b\uff0c\u5b83\u4e0e\u4e3b\u534f\u7a0b\u5206\u79bb\u5e76\u72ec\u7acb\u8fd0\u884c\uff0c\u56e0\u6b64\u4e0d\u4f1a\u5bfc\u81f4\u6b7b\u9501\u3002<\/p>\n
\u672c\u7bc7\u5173\u4e8e\u300aGo \u8bed\u8a00\u4e2d\u7684\u6b7b\u9501\u9519\u8bef\uff1a\u6240\u6709\u534f\u7a0b\u4f11\u7720\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\uff0c\u5982\u4f55\u89e3\u51b3\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01<\/p>\n
\n
\n <\/dt>\n
\n   \u4e09\u7ef4\u573a\u666f\u4e2d\u6b63\u65b9\u4f53\u900f\u89c6\u5f3a\u5ea6\u5982\u4f55\u8bbe\u7f6e\u624d\u5408\u9002\uff1f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   GORM Raw \u67e5\u8be2 \u201cunsupported destination\u201d \u9519\u8bef\uff1a\u5982\u4f55\u89e3\u51b3 \u201cselect database()\u201d \u67e5\u8be2\u7ed3\u679c\u6620\u5c04\u95ee\u9898\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-206380","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=206380"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206380\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}