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* Build Handler: Drop rather than reject requests when near

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conn limits and the next hop is not connected, to reduce
      connection congestion
This commit is contained in:
zzz
2009-07-10 13:41:29 +00:00
parent 0f1a4ad4cd
commit e5139113b1
1 changed files with 12 additions and 1 deletions
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13
router/java/src/net/i2p/router/tunnel/pool/BuildHandler.java
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@ -65,6 +65,7 @@ class BuildHandler {
_context.statManager().createRateStat("tunnel.rejectOverloaded", "How long we had to wait before processing the request (when it was rejected)", "Tunnels", new long[] { 60*1000, 10*60*1000 });
_context.statManager().createRateStat("tunnel.acceptLoad", "Delay before processing the accepted request", "Tunnels", new long[] { 60*1000, 10*60*1000 });
_context.statManager().createRateStat("tunnel.dropConnLimits", "Drop instead of reject due to conn limits", "Tunnels", new long[] { 60*1000, 10*60*1000 });
_context.statManager().createRateStat("tunnel.dropLoad", "How long we had to wait before finally giving up on an inbound request (period is queue count)?", "Tunnels", new long[] { 60*1000, 10*60*1000 });
_context.statManager().createRateStat("tunnel.dropLoadDelay", "How long we had to wait before finally giving up on an inbound request?", "Tunnels", new long[] { 60*1000, 10*60*1000 });
_context.statManager().createRateStat("tunnel.dropLoadBacklog", "How many requests were pending when they were so lagged that we had to drop a new inbound request??", "Tunnels", new long[] { 60*1000, 10*60*1000 });
@ -466,7 +467,6 @@ class BuildHandler {
return 0;
}
private static final String PROP_REJECT_NONPARTICIPANT = "router.participantOnly";
private void handleReq(RouterInfo nextPeerInfo, BuildMessageState state, BuildRequestRecord req, Hash nextPeer) {
long ourId = req.readReceiveTunnelId();
long nextId = req.readNextTunnelId();
@ -569,6 +569,17 @@ class BuildHandler {
(isOutEnd ? "outbound endpoint" : isInGW ? "inbound gw" : "participant"));
}
// Connection congestion control:
// If we rejected the request, are near our conn limits, and aren't connected to the next hop,
// just drop it.
if (response != 0 &&
(! _context.routerHash().equals(nextPeer)) &&
(! _context.commSystem().haveOutboundCapacity()) &&
(! _context.commSystem().isEstablished(nextPeer))) {
_context.statManager().addRateData("tunnel.dropConnLimits", 1, 0);
return;
}
BuildResponseRecord resp = new BuildResponseRecord();
byte reply[] = resp.create(_context, response, req.readReplyKey(), req.readReplyIV(), state.msg.getUniqueId());
for (int j = 0; j < TunnelBuildMessage.RECORD_COUNT; j++) {