我遇到了多處理問題;我在Linux 2.6.36上使用python2.7。我知道使用更高級別的模塊或庫會更容易,但我試圖使用較低級別的函數(os.fork()和os.exec *)來確保我真正理解 - 這是一種學習練習。Python多處理問題/誤解
下面是我的代碼,它是一個多處理'ping'工具。這個問題似乎在運行,它會在os.wait()行上每隔一段時間拋出一個OSError。 「沒有子進程」
這對我沒有意義,因爲os.wait()只應在程序捕獲子進程已退出並需要獲得的信號時調用。
以下代碼是樣本輸出。
我在做什麼錯?
帶有下列錯誤的示例輸出-------------------------------------- -
[18188]
[18188, 18189]
[18188, 18189, 18190]
[18188, 18189, 18190, 18191]
[18188, 18189, 18190, 18191, 18192]
[18188, 18189, 18190, 18191, 18192, 18193]
[18188, 18189, 18190, 18191, 18192, 18193, 18194]
[18188, 18189, 18190, 18191, 18192, 18193, 18194, 18195]
[18188, 18189, 18191, 18192, 18193, 18194, 18195, 18196]
[18188, 18191, 18192, 18193, 18194, 18195, 18196, 18197]
[18188, 18191, 18192, 18194, 18195, 18196, 18197, 18198]
[18191, 18192, 18194, 18195, 18196, 18197, 18198, 18201]
[18191, 18194, 18195, 18196, 18197, 18198, 18201, 18202]
[18191, 18195, 18196, 18197, 18198, 18201, 18202, 18203]
[18195, 18196, 18197, 18198, 18201, 18202, 18203, 18204]
[18196, 18197, 18198, 18202, 18203, 18204, 18205]
[18196, 18197, 18198, 18202, 18203, 18204, 18205, 18206]
[18197, 18198, 18202, 18203, 18204, 18205, 18206, 18207]
[18198, 18203, 18204, 18205, 18206, 18207, 18210]
[18198, 18203, 18204, 18205, 18206, 18207, 18210, 18211]
Traceback (most recent call last):
File "./sunmon-mp", line 33, in <module>
pid = os.fork()
File "./sunmon-mp", line 12, in chldClean
pid, status = os.wait()
OSError: [Errno 10] No child processes
[18203, 18204, 18205, 18206, 18207, 18210, 18211, 18212]
[18203, 18204, 18206, 18207, 18210, 18211, 18212, 18213]
[18203, 18204, 18206, 18207, 18211, 18212, 18213, 18214]
[18203, 18204, 18206, 18207, 18211, 18212, 18214, 18215]
[18203, 18204, 18206, 18207, 18212, 18214, 18215, 18217]
[18203, 18204, 18206, 18207, 18214, 18215, 18217, 18218]
[18203, 18204, 18206, 18207, 18215, 18217, 18218, 18219]
[18204, 18206, 18207, 18215, 18217, 18218, 18219, 18220]
[18204, 18206, 18207, 18217, 18218, 18219, 18220, 18221]
[18206, 18207, 18217, 18218, 18219, 18220, 18221, 18223]
[18207, 18217, 18218, 18219, 18220, 18221, 18223, 18224]
[18217, 18218, 18219, 18220, 18221, 18223, 18224, 18225]
[18217, 18219, 18220, 18221, 18223, 18224, 18225, 18226]
[18217, 18219, 18220, 18221, 18223, 18225, 18226, 18227]
[18217, 18219, 18220, 18221, 18223, 18226, 18227, 18228]
[18217, 18220, 18221, 18223, 18226, 18227, 18228, 18229]
[18217, 18220, 18221, 18223, 18227, 18228, 18229, 18230]
[18217, 18220, 18221, 18223, 18227, 18228, 18230, 18231]
[18220, 18221, 18223, 18227, 18228, 18230, 18231, 18233]
[18221, 18223, 18227, 18228, 18230, 18231, 18233, 18234]
[18223, 18227, 18228, 18230, 18231, 18233, 18234, 18235]
[18223, 18227, 18228, 18231, 18233, 18234, 18235, 18236]
[18223, 18227, 18228, 18231, 18233, 18234, 18236, 18237]
[18223, 18227, 18228, 18231, 18233, 18234, 18237, 18239]
[18227, 18228, 18231, 18233, 18234, 18237, 18239, 18240]
[18228, 18231, 18233, 18234, 18237, 18239, 18240, 18241]
[18228, 18231, 18233, 18237, 18239, 18240, 18241, 18242]
[18231, 18233, 18237, 18239, 18240, 18241, 18242, 18243]
[18231, 18233, 18239, 18240, 18241, 18242, 18243, 18244]
[18231, 18233, 18239, 18240, 18242, 18243, 18244, 18245]
[18231, 18233, 18239, 18242, 18243, 18244, 18245, 18246]
[18231, 18233, 18242, 18243, 18244, 18245, 18246, 18247]
[18233, 18242, 18243, 18244, 18245, 18246, 18247, 18248]
[18242, 18243, 18244, 18245, 18246, 18247, 18248, 18249]
[18243, 18244, 18245, 18246, 18247, 18248, 18249, 18250]
[18243, 18245, 18246, 18247, 18248, 18249, 18250, 18251]
[18243, 18245, 18247, 18248, 18249, 18250, 18251, 18252]
[18243, 18245, 18248, 18249, 18250, 18251, 18252, 18253]
[18243, 18245, 18249, 18250, 18251, 18252, 18253, 18254]
[18243, 18245, 18249, 18250, 18252, 18253, 18254, 18255]
[18245, 18249, 18250, 18252, 18253, 18254, 18255, 18258]
[18249, 18250, 18252, 18253, 18254, 18255, 18258, 18259]
[18249, 18250, 18253, 18254, 18255, 18258, 18259, 18260]
[18249, 18250, 18253, 18254, 18255, 18258, 18260, 18261]
[18249, 18250, 18253, 18254, 18255, 18260, 18261, 18262]
[18250, 18253, 18254, 18255, 18260, 18261, 18262, 18263]
[18253, 18254, 18255, 18260, 18261, 18262, 18263, 18264]
[18253, 18254, 18255, 18261, 18262, 18263, 18264, 18265]
[18253, 18254, 18255, 18261, 18262, 18264, 18265, 18266]
[18254, 18255, 18261, 18262, 18264, 18265, 18266, 18267]
[18255, 18261, 18262, 18264, 18265, 18266, 18267, 18268]
[18261, 18262, 18264, 18265, 18266, 18267, 18268, 18269]
[18261, 18262, 18265, 18266, 18267, 18268, 18269, 18270]
[18261, 18262, 18265, 18266, 18267, 18268, 18270, 18271]
[18261, 18262, 18265, 18266, 18267, 18270, 18271, 18273]
[18261, 18262, 18265, 18266, 18270, 18271, 18273, 18274]
[18261, 18262, 18265, 18266, 18271, 18273, 18274, 18275]
[18261, 18262, 18265, 18266, 18271, 18273, 18275, 18276]
[18262, 18265, 18266, 18271, 18273, 18275, 18276, 18277]
[18262, 18265, 18266, 18273, 18275, 18276, 18277, 18278]
[18265, 18266, 18273, 18276, 18277, 18278, 18280]
[18265, 18266, 18273, 18276, 18277, 18278, 18280, 18281]
Traceback (most recent call last):
File "./sunmon-mp", line 33, in <module>
pid = os.fork()
File "./sunmon-mp", line 12, in chldClean
pid, status = os.wait()
OSError: [Errno 10] No child processes
[18265, 18273, 18276, 18277, 18278, 18280, 18282]
[18265, 18276, 18277, 18278, 18280, 18281, 18282, 18283]
[18265, 18276, 18278, 18281, 18282, 18283, 18284]
[18265, 18276, 18278, 18281, 18282, 18283, 18284, 18285]
[18265, 18276, 18278, 18282, 18283, 18284, 18285, 18286]
[18265, 18276, 18278, 18283, 18284, 18286, 18289]
[18265, 18276, 18278, 18283, 18284, 18286, 18289, 18290]
Traceback (most recent call last):
File "./sunmon-mp", line 33, in <module>
pid = os.fork()
File "./sunmon-mp", line 12, in chldClean
pid, status = os.wait()
OSError: [Errno 10] No child processes
[18265, 18276, 18278, 18283, 18284, 18289, 18290, 18291]
[18276, 18278, 18283, 18284, 18289, 18290, 18291, 18292]
[18276, 18278, 18283, 18284, 18290, 18291, 18292, 18293]
[18276, 18278, 18283, 18284, 18290, 18291, 18293, 18294]
[18276, 18278, 18283, 18284, 18290, 18291, 18294, 18295]
[18278, 18283, 18284, 18290, 18291, 18294, 18295, 18297]
[18283, 18284, 18290, 18291, 18294, 18295, 18297, 18298]
[18283, 18284, 18290, 18291, 18295, 18297, 18298, 18299]
您應該使用'#!/ usr/bin/env python'而不是'#!/ usr/bin/python2.7' – ThiefMaster 2011-04-25 21:01:56
您是否查找了「無子進程」錯誤?如果是這樣,請將代碼(和輸出)的大小減小到小而專注。並且包含您找到的「無子進程」錯誤的定義。請**更新**您的問題,以便更容易閱讀而不滾動。 – 2011-04-25 21:03:29
@ThiefMaster在這個系統上的env python是3.1.3-我想要使用python2.7這也是在這個系統上 – tMC 2011-04-25 21:05:33