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[qa] Handle disconnect_node race

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Several tests call disconnect_nodes() on each node-pair in rapid
succession, resulting in a race condition if a node disconnects a peer
in-between the calculation of the nodeid's to disconnect and the
invocation of the disconnectnode rpc call.  Handle this.

GitHub-Pull: #13201
Rebased-From: 09c6699
This commit is contained in:
Suhas Daftuar 2018-05-09 13:14:21 -04:00 committed by fanquake
parent feba12fe85
commit b8aacd660e
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1 changed files with 8 additions and 1 deletions
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9
test/functional/test_framework/util.py
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@ -335,7 +335,14 @@ def set_node_times(nodes, t):
def disconnect_nodes(from_connection, node_num):
for peer_id in [peer['id'] for peer in from_connection.getpeerinfo() if "testnode%d" % node_num in peer['subver']]:
from_connection.disconnectnode(nodeid=peer_id)
try:
from_connection.disconnectnode(nodeid=peer_id)
except JSONRPCException as e:
# If this node is disconnected between calculating the peer id
# and issuing the disconnect, don't worry about it.
# This avoids a race condition if we're mass-disconnecting peers.
if e.error['code'] != -29: # RPC_CLIENT_NODE_NOT_CONNECTED
raise
# wait to disconnect
wait_until(lambda: [peer['id'] for peer in from_connection.getpeerinfo() if "testnode%d" % node_num in peer['subver']] == [], timeout=5)