def test_removed_replica_restored_on_view_change(
looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_client,
tconf, tdir, allPluginsPath, chkFreqPatched, view_change):
"""
1. Remove replica on some node which is not master primary
2. Reconnect the node which was master primary so far
3. Check that nodes and replicas correctly added
"""
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
node = get_last_master_non_primary_node(txnPoolNodeSet)
start_replicas_count = node.replicas.num_replicas
instance_id = start_replicas_count - 1
node.replicas.remove_replica(instance_id)
check_replica_removed(node, start_replicas_count, instance_id)
# trigger view change on all nodes
master_primary = get_master_primary_node(txnPoolNodeSet)
disconnect_node_and_ensure_disconnected(looper, txnPoolNodeSet, master_primary)
txnPoolNodeSet.remove(master_primary)
looper.removeProdable(master_primary)
looper.runFor(tconf.ToleratePrimaryDisconnection + 2)
restarted_node = start_stopped_node(master_primary, looper, tconf, tdir, allPluginsPath)
txnPoolNodeSet.append(restarted_node)
looper.run(checkNodesConnected(txnPoolNodeSet))
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=1,
customTimeout=2 * tconf.VIEW_CHANGE_TIMEOUT)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
assert start_replicas_count == node.replicas.num_replicas
def test_removed_replica_restored_on_view_change(
looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_client,
tconf, tdir, allPluginsPath, chkFreqPatched, view_change):
"""
1. Remove replica on some node which is not master primary
2. Reconnect the node which was master primary so far
3. Check that nodes and replicas correctly added
"""
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
node = get_last_master_non_primary_node(txnPoolNodeSet)
start_replicas_count = node.replicas.num_replicas
instance_id = start_replicas_count - 1
node.replicas.remove_replica(instance_id)
check_replica_removed(node, start_replicas_count, instance_id)
# trigger view change on all nodes
master_primary = get_master_primary_node(txnPoolNodeSet)
disconnect_node_and_ensure_disconnected(looper, txnPoolNodeSet, master_primary)
txnPoolNodeSet.remove(master_primary)
looper.removeProdable(master_primary)
looper.runFor(tconf.ToleratePrimaryDisconnection + 2)
restarted_node = start_stopped_node(master_primary, looper, tconf, tdir, allPluginsPath)
txnPoolNodeSet.append(restarted_node)
looper.run(checkNodesConnected(txnPoolNodeSet))
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=1,
customTimeout=2 * tconf.NEW_VIEW_TIMEOUT)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
assert start_replicas_count == node.replicas.num_replicas
ensure_all_nodes_have_same_data(looper, txnPoolNodeSet)
def testQueueingReqFromFutureView(delayed_perf_chk, looper, txnPoolNodeSet,
sdk_pool_handle, sdk_wallet_client):
"""
Test if every node queues 3 Phase requests(PRE-PREPARE, PREPARE and COMMIT)
that come from a view which is greater than the current view.
- Delay reception and processing of view change messages by a non primary for master instance
=> it starts receiving 3 phase commit messages for next view
"""
lagging_node = get_last_master_non_primary_node(txnPoolNodeSet)
old_view_no = lagging_node.viewNo
# Delay processing of InstanceChange and ViewChangeDone so node stashes
# 3PC messages
delay_ic = 60
lagging_node.nodeIbStasher.delay(icDelay(delay_ic))
lagging_node.nodeIbStasher.delay(vcd_delay(delay_ic))
logger.debug('{} will delay its view change'.format(lagging_node))
def chk_fut_view(view_no, is_empty):
length = len(lagging_node.msgsForFutureViews.get(view_no, ()))
if is_empty:
assert length == 0
else:
assert length > 0
return length
# No messages queued for future view
chk_fut_view(old_view_no + 1, is_empty=True)
logger.debug(
'{} does not have any messages for future views'.format(lagging_node))
# Every node except Node A should do a view change
ensure_view_change(looper,
[n for n in txnPoolNodeSet if n != lagging_node],
[lagging_node])
# send more requests that will be queued for the lagged node
reqs = sdk_send_random_requests(looper, sdk_pool_handle, sdk_wallet_client,
5)
l = looper.run(
eventually(chk_fut_view, old_view_no + 1, False, retryWait=1))
logger.debug('{} has {} messages for future views'.format(lagging_node, l))
sdk_get_replies(looper, reqs)
# reset delays for the lagging_node node so that it finally makes view
# change
lagging_node.reset_delays_and_process_delayeds()
# Eventually no messages queued for future view
looper.run(
eventually(chk_fut_view,
old_view_no + 1,
True,
retryWait=1,
timeout=delay_ic + 10))
logger.debug(
'{} exhausted pending messages for future views'.format(lagging_node))
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_client, 2)
def slow_nodes(node_set):
return [
get_first_master_non_primary_node(node_set),
get_last_master_non_primary_node(node_set)
]
def slow_nodes(node_set):
return [get_first_master_non_primary_node(node_set),
get_last_master_non_primary_node(node_set)]