When establishing outbound connections [TestNode --------> P2PConnection], P2PConnection listens for a single connection from TestNode on a port which is fixed based on p2p_idx.
If we reuse the same port when disconnecting and establishing connections again, we might hit this scenario where:
- disconnection is done on python side for
P2PConnection - disconnection not complete on c++ side for
TestNode - we're trying to establish a new connection on same port again
Prevent this scenario from happening by ensuring disconnection on c++ side for TestNode as well.
One way to reproduce this on master would be adding a sleep statement before disconnection happens on c++ side.
diff --git a/src/net.cpp b/src/net.cpp
index e388f05b03..62507d1f39 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -2112,6 +2112,7 @@ void CConnman::SocketHandlerConnected(const std::vector<CNode*>& nodes,
if (!pnode->fDisconnect) {
LogPrint(BCLog::NET, "socket closed for peer=%d\n", pnode->GetId());
}
+ std::this_thread::sleep_for(std::chrono::milliseconds(1000));
pnode->CloseSocketDisconnect();
}
else if (nBytes < 0)
