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Editorial Team
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Asked: 2026-05-26T12:33:29+00:00

Do you know how can I keep alive a socket connection if I do

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Do you know how can I keep alive a socket connection if I do not do any actions on the socket?
I just noticed that if my connection is on background and I do not operate it I get this:

java.net.SocketException: Connection reset by peer: socket write error
    at java.net.SocketOutputStream.socketWrite0(Native Method)
    at java.net.SocketOutputStream.socketWrite(Unknown Source)
    at java.net.SocketOutputStream.write(Unknown Source)
    at java.io.DataOutputStream.writeInt(Unknown Source)

So, how can I control that the connection will not be lost after some idle time and after how much time by default does it happen?

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1 Answer

  1. Editorial Team

    This problem has no general solution. It is quite likely that the remote server / service that has decided to reset/close the TCP/IP connection. How and why it decides is application specific. An application specific solution will be required to prevent it.

    FWIW, the SO_KEEP_ALIVE mechanism causes the protocol stack to occasionally exchange messages on an otherwise idle TCP/IP connection. This may help if you are experiencing resets on a NATed connection due to port reuse. The relevant Java method is Socket.setKeepAlive.

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