From dcae0d348bb7f5d9052e50a83383a33538ce376a Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Thu, 11 Oct 2018 20:32:14 +0200 Subject: p2p/simulations: fix a deadlock and clean up adapters (#17891) This fixes a rare deadlock with the inproc adapter: - A node is stopped, which acquires Network.lock. - The protocol code being simulated (swarm/network in my case) waits for its goroutines to shut down. - One of those goroutines calls into the simulation to add a peer, which waits for Network.lock. The fix for the deadlock is really simple, just release the lock before stopping the simulation node. Other changes in this PR clean up the exec adapter so it reports node startup errors better and remove the docker adapter because it just adds overhead. In the exec adapter, node information is now posted to a one-shot server. This avoids log parsing and allows reporting startup errors to the simulation host. A small change in package node was needed because simulation nodes use port zero. Node.{HTTP,WS}Endpoint now return the live endpoints after startup by checking the TCP listener. --- node/node.go | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'node') diff --git a/node/node.go b/node/node.go index ada383721..85299dba7 100644 --- a/node/node.go +++ b/node/node.go @@ -549,11 +549,23 @@ func (n *Node) IPCEndpoint() string { // HTTPEndpoint retrieves the current HTTP endpoint used by the protocol stack. func (n *Node) HTTPEndpoint() string { + n.lock.Lock() + defer n.lock.Unlock() + + if n.httpListener != nil { + return n.httpListener.Addr().String() + } return n.httpEndpoint } // WSEndpoint retrieves the current WS endpoint used by the protocol stack. func (n *Node) WSEndpoint() string { + n.lock.Lock() + defer n.lock.Unlock() + + if n.wsListener != nil { + return n.wsListener.Addr().String() + } return n.wsEndpoint } -- cgit v1.2.3