运行roslaunch时报错unableto contact my own server at
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[ERROR] Failed to contact master at [localhost:11311]. Retrying...
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asp:An error occurred on the server when processing the URL. Please contact the system administrator
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Unable to contact my own server at [http:huang:39193]
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TNS-12547: TNS:lost contactTNS-12560: TNS:protocol adapter error TNS-00517: Lost contact
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[ERROR] [1581252305.759921866]: [registerPublisher] Failed to contact master at [localhost:11311].
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Fail to contact Jack Server: Problem reading xxxxxx
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