[chord] Overloaded by doRPC call back

[Hai Dao Le]

Hi,

 

In my experiment, I add the following codes to make an RTT measurement
to other nodes before they are added to my location table.

 

void 

vnode_impl::loc_insert (ptr<location> loc) 

{

u_int64_t sent = getusec ();

   ptr<chordID> ga = New refcounted<chordID> (loc->id());

   chord_nodelistextres *lst = New chord_nodelistextres ();

   doRPC(loc, chord_program_1, CHORDPROC_GETSUCC_EXT, ga, lst,
wrap(this, &vnode_impl::loc_insert_cb, sent, loc));

}

void

vnode_impl::loc_insert_cb(u_int64_t sent, ptr<location> loc, clnt_stat
err)

{

  if (err) {

      warnx << "PING: RPC failure " << loc->address() << " " << err <<
"\n";

  } else {

     u_int64_t now = getusec ();

     if  (now >= sent) {

       u_int64_t lat = now - sent;

       loc->set_distance(lat);

       locations->insert (loc); 

      }

   }

}

 

When running, my machine is overloaded by a huge number of error reports
like a loop (different destination each time)

 

PING: RPC failure 12.46.129.21:3333 RPC: Timed out

 1166346453:051260 RPC failure: RPC: Timed out destined for
7510425f84dc35e9a8fe12f7e31c50f28a8338b7 at 12.46.129.21 seqno 95446 out
172061700

PING: RPC failure 12.46.129.21:3333 RPC: Timed out

 1166346453:051650 RPC failure: RPC: Timed out destined for
7510425f84dc35e9a8fe12f7e31c50f28a8338b7 at 12.46.129.21 seqno 95447 out
171214084

PING: RPC failure 12.46.129.21:3333 RPC: Timed out

 1166346453:052059 RPC failure: RPC: Timed out destined for
7510425f84dc35e9a8fe12f7e31c50f28a8338b7 at 12.46.129.21 seqno 95448 out
170422532

PING: RPC failure 12.46.129.21:3333 RPC: Timed out

 1166346453:052451 RPC failure: RPC: Timed out destined for
7510425f84dc35e9a8fe12f7e31c50f28a8338b7 at 12.46.129.21 seqno 95449 out
172283652

PING: RPC failure 12.46.129.21:3333 RPC: Timed out

 

What's wrong in my codes? Please give me your suggestions.

 

Thanks so much in advance,

 

Hai

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