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From the log it appears that your system is refusing to open sockets. https://answers.ros.org/question/11488/unknown-error-initiating-tcpip-socket/

I found reference that you might be exhausting your socket allocations: https://answers.ros.org/question/202551/nodes-stop-subscribing-over-time/

Or possibly some other system setting is preventing them from opening such as the packet size: https://answers.ros.org/question/10248/prosilica-intrinsincs-parameters-failed-to-load/

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