def testViewChangesIfMasterPrimaryDisconnected(txnPoolNodeSet, looper, wallet1,
client1, client1Connected,
tconf):
"""
View change occurs when master's primary is disconnected
"""
# Setup
nodes = txnPoolNodeSet
viewNoBefore = checkViewNoForNodes(nodes)
old_pr_node = get_master_primary_node(nodes)
# Stop primary
stopNodes([old_pr_node], looper)
looper.removeProdable(old_pr_node)
remainingNodes = list(set(nodes) - {old_pr_node})
# Sometimes it takes time for nodes to detect disconnection
ensure_node_disconnected(looper, old_pr_node, remainingNodes, timeout=20)
looper.runFor(tconf.ToleratePrimaryDisconnection + 2)
# Give some time to detect disconnection and then verify that view has
# changed and new primary has been elected
waitForViewChange(looper, remainingNodes, viewNoBefore + 1)
ensure_all_nodes_have_same_data(looper, nodes=remainingNodes)
new_pr_node = get_master_primary_node(remainingNodes)
assert old_pr_node != new_pr_node
sendReqsToNodesAndVerifySuffReplies(looper, wallet1, client1, 5)
def test_propagate_primary_after_primary_restart_view_0(
looper, txnPoolNodeSet, tconf, sdk_pool_handle, sdk_wallet_steward,
tdir, allPluginsPath):
"""
Delay instance change msgs to prevent view change during primary restart
to test propagate primary for primary node.
ppSeqNo should be > 0 to be able to check that propagate primary restores all
indexes correctly
case viewNo == 0
"""
sdk_ensure_pool_functional(looper, txnPoolNodeSet, sdk_wallet_steward,
sdk_pool_handle)
old_ppseqno = _get_ppseqno(txnPoolNodeSet)
assert (old_ppseqno > 0)
old_viewNo = checkViewNoForNodes(txnPoolNodeSet)
old_primary = get_master_primary_node(txnPoolNodeSet)
delay_instance_change(txnPoolNodeSet, IC_DELAY_SEC)
disconnect_node_and_ensure_disconnected(looper,
txnPoolNodeSet,
old_primary,
stopNode=True)
looper.removeProdable(old_primary)
logger.info("Restart node {}".format(old_primary))
restartedNode = start_stopped_node(old_primary,
looper,
tconf,
tdir,
allPluginsPath,
delay_instance_change_msgs=False)
idx = [
i for i, n in enumerate(txnPoolNodeSet) if n.name == restartedNode.name
][0]
txnPoolNodeSet[idx] = restartedNode
restartedNode.nodeIbStasher.delay(icDelay(IC_DELAY_SEC))
looper.run(checkNodesConnected(txnPoolNodeSet))
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
new_viewNo = checkViewNoForNodes(txnPoolNodeSet)
assert (new_viewNo == old_viewNo)
new_primary = get_master_primary_node(txnPoolNodeSet)
assert (new_primary.name == old_primary.name)
# check ppSeqNo the same
_get_ppseqno(txnPoolNodeSet)
sdk_ensure_pool_functional(looper, txnPoolNodeSet, sdk_wallet_steward,
sdk_pool_handle)
new_ppseqno = _get_ppseqno(txnPoolNodeSet)
assert (new_ppseqno > old_ppseqno)
def test_view_change_timeout(nodeSet, looper, up, wallet1, client1):
"""
Check view change restarted if it is not completed in time
"""
m_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
initial_view_no = waitForViewChange(looper, nodeSet)
# Setting view change timeout to low value to make test pass quicker
for node in nodeSet:
node._view_change_timeout = 5
# Delaying view change messages to make first view change fail
# due to timeout
for node in nodeSet:
node.nodeIbStasher.delay(vcd_delay(delay=50))
# Delaying preprepae messages from nodes and
# sending request to force view change
#for i in range(3):
# delayNonPrimaries(nodeSet, instId=i, delay=10)
#sendReqsToNodesAndVerifySuffReplies(looper, wallet1, client1, 4)
times = {}
for node in nodeSet:
times[node.name] = {
'called': get_count(node, node._check_view_change_completed),
'returned_true': len(getAllReturnVals(
node, node._check_view_change_completed, compare_val_to=True))
}
for node in nodeSet:
node.startViewChange(initial_view_no + 1)
# First view change should fail, because of delayed
# instance change messages. This then leads to new view change that we need.
with pytest.raises(AssertionError):
ensureElectionsDone(looper=looper, nodes=nodeSet, customTimeout=10)
# Resetting delays to let second view change go well
reset_delays_and_process_delayeds(nodeSet)
# This view change should be completed with no problems
ensureElectionsDone(looper=looper, nodes=nodeSet)
ensure_all_nodes_have_same_data(looper, nodes=nodeSet)
new_m_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
assert m_primary_node.name != new_m_primary_node.name
# The timeout method has been called at least once
for node in nodeSet:
assert get_count(node, node._check_view_change_completed) > times[node.name]['called']
assert len(getAllReturnVals(node,
node._check_view_change_completed,
compare_val_to=True)) > times[node.name]['returned_true']
# Multiple view changes have been initiated
for node in nodeSet:
assert (node.viewNo - initial_view_no) > 1
ensure_pool_functional(looper, nodeSet, wallet1, client1)
def test_view_changes_if_master_primary_disconnected(txnPoolNodeSet, looper,
sdk_pool_handle,
sdk_wallet_client, tdir,
tconf, allPluginsPath):
"""
View change occurs when master's primary is disconnected
"""
# Setup
nodes = txnPoolNodeSet
old_view_no = checkViewNoForNodes(nodes)
old_pr_node = get_master_primary_node(nodes)
# Stop primary
disconnect_node_and_ensure_disconnected(looper,
txnPoolNodeSet,
old_pr_node,
stopNode=True)
looper.removeProdable(old_pr_node)
remaining_nodes = list(set(nodes) - {old_pr_node})
# Sometimes it takes time for nodes to detect disconnection
ensure_node_disconnected(looper, old_pr_node, remaining_nodes, timeout=20)
looper.runFor(tconf.ToleratePrimaryDisconnection + 2)
# Give some time to detect disconnection and then verify that view has
# changed and new primary has been elected
waitForViewChange(looper, remaining_nodes, old_view_no + 1)
ensure_all_nodes_have_same_data(looper, nodes=remaining_nodes)
new_pr_node = get_master_primary_node(remaining_nodes)
assert old_pr_node != new_pr_node
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_client, 5)
# Check if old primary can join the pool and still functions
old_pr_node = start_stopped_node(old_pr_node, looper, tconf, tdir,
allPluginsPath)
txnPoolNodeSet = remaining_nodes + [old_pr_node]
looper.run(
eventually(checkViewNoForNodes,
txnPoolNodeSet,
old_view_no + 1,
timeout=tconf.VIEW_CHANGE_TIMEOUT))
# After node catches up it set view_no from audit ledger and do not need to do view_change
assert len(
getAllReturnVals(old_pr_node.view_changer,
old_pr_node.view_changer.start_view_change,
compare_val_to=True)) == 0
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
assert not old_pr_node.view_changer._next_view_indications
def test_view_change_on_quorum_of_master_degraded(txnPoolNodeSet, looper,
sdk_pool_handle,
sdk_wallet_steward, viewNo):
"""
Node will change view even though it does not find the master to be degraded
when a quorum of nodes agree that master performance degraded
"""
m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
# Delay processing of PRE-PREPARE from all non primary replicas of master
# so master's performance falls and view changes
delayNonPrimaries(txnPoolNodeSet, 0, 10)
pr = getPrimaryReplica(txnPoolNodeSet, 0)
relucatantNode = pr.node
# Count sent instance changes of all nodes
sentInstChanges = {}
for n in txnPoolNodeSet:
sentInstChanges[n.name] = node_sent_instance_changes_count(n)
# Node reluctant to change view, never says master is degraded
relucatantNode.monitor.isMasterDegraded = types.MethodType(
lambda x: False, relucatantNode.monitor)
backup_replica = txnPoolNodeSet[0].replicas[1]
backup_last_ordered_before = backup_replica.last_ordered_3pc
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, 4)
# make sure that backups also ordered at least 1 batch to be able to track performance degradation
looper.run(
eventually(lambda: assertExp(backup_replica.last_ordered_3pc >
backup_last_ordered_before)))
for n in txnPoolNodeSet:
n.checkPerformance()
# Check that view change happened for all nodes
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=viewNo + 1)
# All nodes except the reluctant node should have sent a view change and
# thus must have called `sendInstanceChange`
for n in txnPoolNodeSet:
if n.name != relucatantNode.name:
assert node_sent_instance_changes_count(n) > sentInstChanges.get(
n.name, 0)
else:
assert node_sent_instance_changes_count(n) == sentInstChanges.get(
n.name, 0)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
new_m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert m_primary_node.name != new_m_primary_node.name
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
def testViewChangesIfMasterPrimaryDisconnected(txnPoolNodeSet, looper, wallet1,
client1, client1Connected,
tconf, tdirWithPoolTxns,
allPluginsPath):
"""
View change occurs when master's primary is disconnected
"""
# Setup
nodes = txnPoolNodeSet
old_view_no = checkViewNoForNodes(nodes)
old_pr_node = get_master_primary_node(nodes)
# Stop primary
disconnect_node_and_ensure_disconnected(looper,
txnPoolNodeSet,
old_pr_node,
stopNode=True)
looper.removeProdable(old_pr_node)
remaining_nodes = list(set(nodes) - {old_pr_node})
# Sometimes it takes time for nodes to detect disconnection
ensure_node_disconnected(looper, old_pr_node, remaining_nodes, timeout=20)
looper.runFor(tconf.ToleratePrimaryDisconnection + 2)
# Give some time to detect disconnection and then verify that view has
# changed and new primary has been elected
waitForViewChange(looper, remaining_nodes, old_view_no + 1)
ensure_all_nodes_have_same_data(looper, nodes=remaining_nodes)
new_pr_node = get_master_primary_node(remaining_nodes)
assert old_pr_node != new_pr_node
sendReqsToNodesAndVerifySuffReplies(looper, wallet1, client1, 5)
# Check if old primary can join the pool and still functions
old_pr_node = start_stopped_node(old_pr_node, looper, tconf,
tdirWithPoolTxns, allPluginsPath)
txnPoolNodeSet = remaining_nodes + [old_pr_node]
looper.run(
eventually(checkViewNoForNodes,
txnPoolNodeSet,
old_view_no + 1,
timeout=10))
assert len(
getAllReturnVals(old_pr_node,
old_pr_node._start_view_change_if_possible,
compare_val_to=True)) > 0
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
assert not old_pr_node._next_view_indications
def test_propagate_primary_after_primary_restart_view_1(
looper, txnPoolNodeSet, tconf, sdk_pool_handle, sdk_wallet_steward, tdir, allPluginsPath):
"""
Delay instance change msgs to prevent view change during primary restart
to test propagate primary for primary node.
ppSeqNo should be > 0 to be able to check that propagate primary restores all
indices correctly
case viewNo > 0
"""
ensure_view_change(looper, txnPoolNodeSet)
checkViewNoForNodes(txnPoolNodeSet, expectedViewNo=1)
sdk_ensure_pool_functional(looper, txnPoolNodeSet, sdk_wallet_steward, sdk_pool_handle)
old_ppseqno = _get_ppseqno(txnPoolNodeSet)
assert (old_ppseqno > 0)
old_viewNo = checkViewNoForNodes(txnPoolNodeSet)
old_primary = get_master_primary_node(txnPoolNodeSet)
delay_instance_change(txnPoolNodeSet, IC_DELAY_SEC)
disconnect_node_and_ensure_disconnected(looper, txnPoolNodeSet, old_primary, stopNode=True)
looper.removeProdable(old_primary)
logger.info("Restart node {}".format(old_primary))
restartedNode = start_stopped_node(old_primary, looper, tconf, tdir, allPluginsPath,
delay_instance_change_msgs=False)
idx = [i for i, n in enumerate(txnPoolNodeSet) if n.name == restartedNode.name][0]
txnPoolNodeSet[idx] = restartedNode
restartedNode.nodeIbStasher.delay(icDelay(IC_DELAY_SEC))
looper.run(checkNodesConnected(txnPoolNodeSet))
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
new_viewNo = checkViewNoForNodes(txnPoolNodeSet)
assert (new_viewNo == old_viewNo)
new_primary = get_master_primary_node(txnPoolNodeSet)
assert (new_primary.name == old_primary.name)
# check ppSeqNo the same
_get_ppseqno(txnPoolNodeSet)
sdk_ensure_pool_functional(looper, txnPoolNodeSet, sdk_wallet_steward, sdk_pool_handle)
new_ppseqno = _get_ppseqno(txnPoolNodeSet)
assert (new_ppseqno > old_ppseqno)
def test_view_change_on_quorum_of_master_degraded(txnPoolNodeSet, looper,
sdk_pool_handle,
sdk_wallet_steward, viewNo):
"""
Node will change view even though it does not find the master to be degraded
when a quorum of nodes agree that master performance degraded
"""
m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
# Delay processing of PRE-PREPARE from all non primary replicas of master
# so master's performance falls and view changes
delayNonPrimaries(txnPoolNodeSet, 0, 10)
pr = getPrimaryReplica(txnPoolNodeSet, 0)
relucatantNode = pr.node
# Count sent instance changes of all nodes
sentInstChanges = {}
instChngMethodName = ViewChanger.sendInstanceChange.__name__
for n in txnPoolNodeSet:
sentInstChanges[n.name] = n.view_changer.spylog.count(
instChngMethodName)
# Node reluctant to change view, never says master is degraded
relucatantNode.monitor.isMasterDegraded = types.MethodType(
lambda x: False, relucatantNode.monitor)
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, 4)
for n in txnPoolNodeSet:
n.checkPerformance()
# Check that view change happened for all nodes
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=viewNo + 1)
# All nodes except the reluctant node should have sent a view change and
# thus must have called `sendInstanceChange`
for n in txnPoolNodeSet:
if n.name != relucatantNode.name:
assert n.view_changer.spylog.count(instChngMethodName) > \
sentInstChanges.get(n.name, 0)
else:
assert n.view_changer.spylog.count(instChngMethodName) == \
sentInstChanges.get(n.name, 0)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
new_m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert m_primary_node.name != new_m_primary_node.name
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
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 test_instance_change_before_vc(looper,
txnPoolNodeSet,
tconf,
sdk_pool_handle,
sdk_wallet_steward):
master_node = get_master_primary_node(txnPoolNodeSet)
old_view = master_node.viewNo
expected_view_no = old_view + 1
panic_node = txnPoolNodeSet[-1]
panic_node.view_changer.on_master_degradation()
def has_inst_chng_in_validator_info():
for node in txnPoolNodeSet:
latest_info = node._info_tool.info
ic_queue = latest_info['Node_info']['View_change_status']['IC_queue']
assert expected_view_no in ic_queue
assert ic_queue[expected_view_no]["Voters"][panic_node.name]['reason'] == Suspicions.PRIMARY_DEGRADED.code
looper.run(eventually(has_inst_chng_in_validator_info))
for node in txnPoolNodeSet:
node.view_changer.on_master_degradation()
looper.run(eventually(checkViewNoForNodes, txnPoolNodeSet, expected_view_no, retryWait=1,
timeout=tconf.NEW_VIEW_TIMEOUT))
waitNodeDataEquality(looper, master_node, *txnPoolNodeSet)
def is_inst_chngs_cleared():
for node in txnPoolNodeSet:
latest_info = node._info_tool.info
assert latest_info['Node_info']['View_change_status']['IC_queue'] == {}
looper.run(eventually(is_inst_chngs_cleared))
def split_nodes(nodes):
primary_node = get_master_primary_node(nodes)
slow_node = getNonPrimaryReplicas(nodes, 0)[-1].node
other_nodes = [n for n in nodes if n != slow_node]
other_non_primary_nodes = [n for n in nodes if n not in
(slow_node, primary_node)]
return slow_node, other_nodes, primary_node, other_non_primary_nodes
def test_view_change_retry_by_timeout(
txnPoolNodeSet, looper, tconf, setup, sdk_pool_handle, sdk_wallet_client):
"""
Verifies that a view change is restarted if it is not completed in time
"""
m_primary_node, initial_view_no, timeout_callback_stats = setup
stashers = [n.nodeIbStasher for n in txnPoolNodeSet]
with delay_rules(stashers, vcd_delay()):
start_view_change(txnPoolNodeSet, initial_view_no + 1)
# First view change should fail, because of delayed ViewChangeDone
# messages. This then leads to new view change that we need.
with pytest.raises(AssertionError):
ensureElectionsDone(looper=looper,
nodes=txnPoolNodeSet,
customTimeout=1.5 * VIEW_CHANGE_TIMEOUT)
# Now as ViewChangeDone messages are unblocked view changes should finish successfully
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
new_m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert m_primary_node.name != new_m_primary_node.name
# The timeout method was called one time
check_watchdog_called_expected_times(txnPoolNodeSet, timeout_callback_stats, 1)
# 2 view changes have been initiated
for node in txnPoolNodeSet:
assert node.viewNo - initial_view_no == 2
sdk_ensure_pool_functional(looper, txnPoolNodeSet,
sdk_wallet_client,
sdk_pool_handle)
def test_number_txns_in_catchup_and_vc_queue_valid(looper, txnPoolNodeSet,
tconf, sdk_pool_handle,
sdk_wallet_steward):
num_txns = 5
master_node = get_master_primary_node(txnPoolNodeSet)
old_view = master_node.viewNo
expected_view_no = old_view + 1
disconnect_node_and_ensure_disconnected(looper,
txnPoolNodeSet,
master_node,
stopNode=False)
looper.run(
eventually(checkViewNoForNodes,
txnPoolNodeSet[1:],
expected_view_no,
retryWait=1,
timeout=tconf.VIEW_CHANGE_TIMEOUT))
sdk_pool_refresh(looper, sdk_pool_handle)
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, num_txns)
reconnect_node_and_ensure_connected(looper, txnPoolNodeSet, master_node)
waitNodeDataEquality(looper, master_node, *txnPoolNodeSet[-1:])
latest_info = master_node._info_tool.info
assert latest_info['Node_info']['Catchup_status'][
'Number_txns_in_catchup'][1] == num_txns
assert latest_info['Node_info']['View_change_status'][
'View_No'] == expected_view_no
node_names = [n.name for n in txnPoolNodeSet[1:]]
for node_name in node_names:
assert latest_info['Node_info']['View_change_status']['VCDone_queue'][
node_name][0] == master_node.master_primary_name
assert latest_info['Node_info']['View_change_status']['VCDone_queue'][
node_name][1]
assert latest_info['Node_info']['View_change_status'][
'Last_complete_view_no'] == expected_view_no
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_view_change_retry_by_timeout(txnPoolNodeSet, looper, tconf, setup,
sdk_pool_handle, sdk_wallet_client):
"""
Verifies that a view change is restarted if it is not completed in time
"""
m_primary_node, initial_view_no, timeout_callback_stats = setup
stashers = [n.nodeIbStasher for n in txnPoolNodeSet]
with delay_rules(stashers, nv_delay()):
start_view_change(txnPoolNodeSet, initial_view_no + 1)
# First view change should fail, because of delayed ViewChangeDone
# messages. This then leads to new view change that we need.
with pytest.raises(AssertionError):
ensureElectionsDone(looper=looper,
nodes=txnPoolNodeSet,
customTimeout=1.5 * NEW_VIEW_TIMEOUT)
# Now as ViewChangeDone messages are unblocked view changes should finish successfully
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
new_m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert m_primary_node.name != new_m_primary_node.name
# The timeout method was called one time
check_watchdog_called_expected_times(txnPoolNodeSet,
timeout_callback_stats, 1)
# 2 view changes have been initiated
for node in txnPoolNodeSet:
assert node.viewNo - initial_view_no == 2
sdk_ensure_pool_functional(looper, txnPoolNodeSet, sdk_wallet_client,
sdk_pool_handle)
def test_number_txns_in_catchup_and_vc_queue_valid(looper,
txnPoolNodeSet,
tconf,
sdk_pool_handle,
sdk_wallet_steward,
tdir,
allPluginsPath):
num_txns = 5
master_node = get_master_primary_node(txnPoolNodeSet)
master_node_index = txnPoolNodeSet.index(master_node)
other_nodes = txnPoolNodeSet.copy()
other_nodes.remove(master_node)
old_view = master_node.viewNo
expected_view_no = old_view + 1
disconnect_node_and_ensure_disconnected(looper, txnPoolNodeSet, master_node, stopNode=True)
looper.removeProdable(master_node)
looper.run(eventually(checkViewNoForNodes, other_nodes, expected_view_no, retryWait=1,
timeout=tconf.NEW_VIEW_TIMEOUT))
sdk_pool_refresh(looper, sdk_pool_handle)
sdk_send_random_and_check(looper, other_nodes, sdk_pool_handle, sdk_wallet_steward, num_txns)
master_node = start_stopped_node(master_node, looper, tconf,
tdir, allPluginsPath)
txnPoolNodeSet[master_node_index] = master_node
looper.run(checkNodesConnected(txnPoolNodeSet))
waitNodeDataEquality(looper, master_node, *txnPoolNodeSet[-1:],
exclude_from_check=['check_last_ordered_3pc_backup'])
latest_info = master_node._info_tool.info
assert latest_info['Node_info']['Catchup_status']['Number_txns_in_catchup'][1] == num_txns
assert latest_info['Node_info']['View_change_status']['View_No'] == expected_view_no
for n in other_nodes:
assert n._info_tool.info['Node_info']['View_change_status']['Last_complete_view_no'] == expected_view_no
def test_primary_receives_delayed_prepares(looper, txnPoolNodeSet,
sdk_wallet_client,
sdk_pool_handle):
"""
Primary gets all PREPAREs after COMMITs
"""
delay = 50
primary_node = get_master_primary_node(txnPoolNodeSet)
other_nodes = [n for n in txnPoolNodeSet if n != primary_node]
primary_node.nodeIbStasher.delay(pDelay(delay, 0))
sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_client,
count=10)
for node in other_nodes:
assert node.master_replica.prePrepares
assert node.master_replica.prepares
assert node.master_replica.commits
assert primary_node.master_replica.sentPrePrepares
assert not primary_node.master_replica.prepares
assert primary_node.master_replica.commits
def test_view_change_on_quorum_of_master_degraded(txnPoolNodeSet, looper,
sdk_pool_handle,
sdk_wallet_steward,
viewNo):
"""
Node will change view even though it does not find the master to be degraded
when a quorum of nodes agree that master performance degraded
"""
m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
# Delay processing of PRE-PREPARE from all non primary replicas of master
# so master's performance falls and view changes
delayNonPrimaries(txnPoolNodeSet, 0, 10)
pr = getPrimaryReplica(txnPoolNodeSet, 0)
relucatantNode = pr.node
# Count sent instance changes of all nodes
sentInstChanges = {}
instChngMethodName = ViewChanger.sendInstanceChange.__name__
for n in txnPoolNodeSet:
sentInstChanges[n.name] = n.view_changer.spylog.count(instChngMethodName)
# Node reluctant to change view, never says master is degraded
relucatantNode.monitor.isMasterDegraded = types.MethodType(
lambda x: False, relucatantNode.monitor)
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, 4)
# Check that view change happened for all nodes
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=viewNo + 1)
# All nodes except the reluctant node should have sent a view change and
# thus must have called `sendInstanceChange`
for n in txnPoolNodeSet:
if n.name != relucatantNode.name:
assert n.view_changer.spylog.count(instChngMethodName) > \
sentInstChanges.get(n.name, 0)
else:
assert n.view_changer.spylog.count(instChngMethodName) == \
sentInstChanges.get(n.name, 0)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
new_m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert m_primary_node.name != new_m_primary_node.name
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
def test_view_change_on_performance_degraded(looper, nodeSet, up, viewNo,
wallet1, client1):
"""
Test that a view change is done when the performance of master goes down
Send multiple requests from the client and delay some requests by master
instance so that there is a view change. All nodes will agree that master
performance degraded
"""
old_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
simulate_slow_master(looper, nodeSet, wallet1, client1)
waitForViewChange(looper, nodeSet, expectedViewNo=viewNo + 1)
ensureElectionsDone(looper=looper, nodes=nodeSet)
ensure_all_nodes_have_same_data(looper, nodes=nodeSet)
new_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
assert old_primary_node.name != new_primary_node.name
def test_view_changes_if_master_primary_disconnected(txnPoolNodeSet, looper, sdk_pool_handle,
sdk_wallet_client, tdir, tconf, allPluginsPath):
"""
View change occurs when master's primary is disconnected
"""
# Setup
nodes = txnPoolNodeSet
old_view_no = checkViewNoForNodes(nodes)
old_pr_node = get_master_primary_node(nodes)
# Stop primary
disconnect_node_and_ensure_disconnected(looper, txnPoolNodeSet,
old_pr_node, stopNode=True)
looper.removeProdable(old_pr_node)
remaining_nodes = list(set(nodes) - {old_pr_node})
# Sometimes it takes time for nodes to detect disconnection
ensure_node_disconnected(looper, old_pr_node, remaining_nodes, timeout=20)
looper.runFor(tconf.ToleratePrimaryDisconnection + 2)
# Give some time to detect disconnection and then verify that view has
# changed and new primary has been elected
waitForViewChange(looper, remaining_nodes, old_view_no + 1)
ensure_all_nodes_have_same_data(looper, nodes=remaining_nodes)
new_pr_node = get_master_primary_node(remaining_nodes)
assert old_pr_node != new_pr_node
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_client, 5)
# Check if old primary can join the pool and still functions
old_pr_node = start_stopped_node(old_pr_node, looper, tconf,
tdir, allPluginsPath)
txnPoolNodeSet = remaining_nodes + [old_pr_node]
looper.run(eventually(checkViewNoForNodes,
txnPoolNodeSet, old_view_no + 1, timeout=tconf.VIEW_CHANGE_TIMEOUT))
assert len(getAllReturnVals(old_pr_node.view_changer,
old_pr_node.view_changer._start_view_change_if_possible,
compare_val_to=True)) > 0
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
assert not old_pr_node.view_changer._next_view_indications
def simulate_slow_master(looper, nodeSet, wallet,
client, delay=10, num_reqs=4):
m_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
# Delay processing of PRE-PREPARE from all non primary replicas of master
# so master's performance falls and view changes
delayNonPrimaries(nodeSet, 0, delay)
sendReqsToNodesAndVerifySuffReplies(looper, wallet, client, num_reqs)
return m_primary_node
def simulate_slow_master(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, delay=10, num_reqs=4):
m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
# Delay processing of PRE-PREPARE from all non primary replicas of master
# so master's performance falls and view changes
delayNonPrimaries(txnPoolNodeSet, 0, delay)
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, num_reqs)
return m_primary_node
def test_view_change_on_performance_degraded(looper, txnPoolNodeSet, viewNo,
sdk_pool_handle,
sdk_wallet_steward):
"""
Test that a view change is done when the performance of master goes down
Send multiple requests from the client and delay some requests by master
instance so that there is a view change. All nodes will agree that master
performance degraded
"""
old_primary_node = get_master_primary_node(list(txnPoolNodeSet))
simulate_slow_master(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward)
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=viewNo + 1)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
new_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert old_primary_node.name != new_primary_node.name
def test_view_change_on_performance_degraded(looper, txnPoolNodeSet, viewNo,
sdk_pool_handle,
sdk_wallet_steward):
"""
Test that a view change is done when the performance of master goes down
Send multiple requests from the client and delay some requests by master
instance so that there is a view change. All nodes will agree that master
performance degraded
"""
old_primary_node = get_master_primary_node(list(txnPoolNodeSet))
trigger_view_change(txnPoolNodeSet)
waitForViewChange(looper, txnPoolNodeSet, expectedViewNo=viewNo + 1)
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
new_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert old_primary_node.name != new_primary_node.name
waitNodeDataEquality(looper, *txnPoolNodeSet)
def test_view_not_changed_when_short_disconnection(txnPoolNodeSet, looper,
sdk_pool_handle,
sdk_wallet_client, tdir,
tconf, allPluginsPath):
"""
When primary is disconnected but not long enough to trigger the timeout,
view change should not happen
"""
pr_node = get_master_primary_node(txnPoolNodeSet)
view_no = checkViewNoForNodes(txnPoolNodeSet)
prp_inst_chg_calls = {
node.name: node.spylog.count(node.propose_view_change.__name__)
for node in txnPoolNodeSet if node != pr_node
}
recv_inst_chg_calls = {
node.name: node.spylog.count(
node.view_changer.process_instance_change_msg.__name__)
for node in txnPoolNodeSet if node != pr_node
}
# Disconnect master's primary
disconnect_node_and_ensure_disconnected(looper,
txnPoolNodeSet,
pr_node,
timeout=2)
txnPoolNodeSet.remove(pr_node)
looper.removeProdable(name=pr_node.name)
timeout = min(tconf.ToleratePrimaryDisconnection - 1, 1)
# Reconnect master's primary
pr_node = start_stopped_node(pr_node, looper, tconf, tdir, allPluginsPath)
txnPoolNodeSet.append(pr_node)
def chk2():
# Schedule an instance change but do not send it
# since primary joins again
for node in txnPoolNodeSet:
if node != pr_node:
assert node.spylog.count(node.propose_view_change.__name__
) > prp_inst_chg_calls[node.name]
assert node.view_changer.spylog.count(node.view_changer.process_instance_change_msg.__name__) == \
recv_inst_chg_calls[node.name]
looper.run(eventually(chk2, retryWait=.2, timeout=timeout + 1))
assert checkViewNoForNodes(txnPoolNodeSet) == view_no
# Send some requests and make sure the request execute
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_client, 5)
def test_choose_ts_from_state(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward):
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, 1)
primary_node = get_master_primary_node(txnPoolNodeSet)
excpected_ts = get_utc_epoch() + 30
req_handler = primary_node.get_req_handler(DOMAIN_LEDGER_ID)
req_handler.ts_store.set(excpected_ts, req_handler.state.headHash)
primary_node.master_replica.last_accepted_pre_prepare_time = None
reply = sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle,
sdk_wallet_steward, 1)[0][1]
assert abs(excpected_ts - int(get_txn_time(reply['result']))) < 3
def setup(nodeSet, looper):
m_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
initial_view_no = waitForViewChange(looper, nodeSet)
# Setting view change timeout to low value to make test pass quicker
for node in nodeSet:
node._view_change_timeout = view_change_timeout
times = {}
for node in nodeSet:
times[node.name] = {
'called': get_count(node, node._check_view_change_completed),
'returned_true': len(getAllReturnVals(
node, node._check_view_change_completed, compare_val_to=True))
}
return m_primary_node, initial_view_no, times
def malicious_setup(request, txnPoolNodeSet):
primary_node = get_master_primary_node(txnPoolNodeSet)
slow_node = getNonPrimaryReplicas(txnPoolNodeSet, 0)[-1].node
other_nodes = [n for n in txnPoolNodeSet if n != slow_node]
bad_node = [n for n in other_nodes if n != primary_node][0]
good_non_primary_node = [
n for n in other_nodes
if n != slow_node and n != bad_node and n != primary_node
][0]
if request.param == 'do_not_send':
orig_method = bad_node.nodeMsgRouter.routes[MessageReq]
def do_not_send(self, msg, frm):
if msg.msg_type == PREPREPARE:
return
else:
return orig_method(msg, frm)
bad_node.nodeMsgRouter.routes[MessageReq] = types.MethodType(
do_not_send, bad_node)
return primary_node, bad_node, good_non_primary_node, slow_node, \
other_nodes, do_not_send, orig_method
if request.param == 'send_bad':
orig_method = bad_node.nodeMsgRouter.routes[MessageReq]
def send_bad(self, msg, frm):
if msg.msg_type == PREPREPARE:
resp = self.replicas[msg.params['instId']].getPrePrepare(
msg.params['viewNo'], msg.params['ppSeqNo'])
resp = updateNamedTuple(resp, digest='11908ffq')
self.sendToNodes(MessageRep(
**{
f.MSG_TYPE.nm: msg.msg_type,
f.PARAMS.nm: msg.params,
f.MSG.nm: resp
}),
names=[
frm,
])
else:
return orig_method(msg, frm)
bad_node.nodeMsgRouter.routes[MessageReq] = types.MethodType(
send_bad, bad_node)
return primary_node, bad_node, good_non_primary_node, slow_node, \
other_nodes, send_bad, orig_method
def test_view_change_retry_by_timeout(
txnPoolNodeSet, looper, setup, sdk_pool_handle, sdk_wallet_client):
"""
Verifies that a view change is restarted if it is not completed in time
"""
m_primary_node, initial_view_no, timeout_callback_stats = setup
delay_view_change_done_msg(txnPoolNodeSet)
start_view_change(txnPoolNodeSet, initial_view_no + 1)
# First view change should fail, because of delayed ViewChangeDone
# messages. This then leads to new view change that we need.
with pytest.raises(AssertionError):
ensureElectionsDone(looper=looper,
nodes=txnPoolNodeSet,
customTimeout=view_change_timeout + 2)
# Resetting delays to let second view change go well
reset_delays_and_process_delayeds(txnPoolNodeSet)
# This view change should be completed with no problems
ensureElectionsDone(looper=looper, nodes=txnPoolNodeSet)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
new_m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
assert m_primary_node.name != new_m_primary_node.name
# The timeout method was called one time
for node in txnPoolNodeSet:
assert get_count(node,
node._check_view_change_completed) - \
timeout_callback_stats[node.name]['called'] == 1
assert len(getAllReturnVals(node,
node._check_view_change_completed,
compare_val_to=True)) - \
timeout_callback_stats[node.name]['returned_true'] == 1
# 2 view changes have been initiated
for node in txnPoolNodeSet:
assert node.viewNo - initial_view_no == 2
sdk_ensure_pool_functional(looper, txnPoolNodeSet,
sdk_wallet_client,
sdk_pool_handle)
def test_primary_receives_delayed_prepares(looper, txnPoolNodeSet, client1,
wallet1, client1Connected):
"""
Primary gets all PREPAREs after COMMITs
"""
delay = 50
primary_node = get_master_primary_node(txnPoolNodeSet)
other_nodes = [n for n in txnPoolNodeSet if n != primary_node]
primary_node.nodeIbStasher.delay(pDelay(delay, 0))
send_reqs_to_nodes_and_verify_all_replies(looper, wallet1, client1, 10)
for node in other_nodes:
assert node.master_replica.prePrepares
assert node.master_replica.prepares
assert node.master_replica.commits
assert primary_node.master_replica.sentPrePrepares
assert not primary_node.master_replica.prepares
assert primary_node.master_replica.commits
def test_choose_ts_from_state(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_steward):
sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_steward,
1)
primary_node = get_master_primary_node(txnPoolNodeSet)
excpected_ts = get_utc_epoch() + 30
req_handler = primary_node.get_req_handler(DOMAIN_LEDGER_ID)
req_handler.ts_store.set(excpected_ts,
req_handler.state.headHash)
primary_node.master_replica.last_accepted_pre_prepare_time = None
reply = sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_steward,
1)[0][1]
assert abs(excpected_ts - int(get_txn_time(reply['result']))) < 3
def test_choose_ts_from_state(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_steward):
sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_steward,
1)
primary_node = get_master_primary_node(txnPoolNodeSet)
excpected_ts = get_utc_epoch() + 30
req_handler = primary_node.write_manager.request_handlers[NYM][0]
req_handler.database_manager.ts_store.set(excpected_ts,
req_handler.state.headHash)
primary_node.master_replica._ordering_service.last_accepted_pre_prepare_time = None
reply = sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_steward,
1)[0][1]
assert abs(excpected_ts - int(get_txn_time(reply['result']))) < 3
def test_view_change_timeout(nodeSet, looper, up, setup, wallet1, client1):
"""
Check view change restarted if it is not completed in time
"""
m_primary_node, initial_view_no, times = setup
delay_view_change_msg(nodeSet)
start_view_change(nodeSet, initial_view_no + 1)
# First view change should fail, because of delayed
# instance change messages. This then leads to new view change that we
# need.
with pytest.raises(AssertionError):
ensureElectionsDone(looper=looper, nodes=nodeSet, customTimeout=10)
# Resetting delays to let second view change go well
reset_delays_and_process_delayeds(nodeSet)
# This view change should be completed with no problems
ensureElectionsDone(looper=looper, nodes=nodeSet)
ensure_all_nodes_have_same_data(looper, nodes=nodeSet)
new_m_primary_node = get_master_primary_node(list(nodeSet.nodes.values()))
assert m_primary_node.name != new_m_primary_node.name
# The timeout method has been called at least once
for node in nodeSet:
assert get_count(
node,
node._check_view_change_completed) > times[node.name]['called']
assert len(
getAllReturnVals(
node, node._check_view_change_completed,
compare_val_to=True)) > times[node.name]['returned_true']
# Multiple view changes have been initiated
for node in nodeSet:
assert (node.viewNo - initial_view_no) > 1
ensure_pool_functional(looper, nodeSet, wallet1, client1)
def test_view_change_on_start(tconf, txnPoolNodeSet, looper, sdk_pool_handle,
sdk_wallet_client):
"""
Do view change on a without any requests
"""
old_view_no = txnPoolNodeSet[0].viewNo
master_primary = get_master_primary_node(txnPoolNodeSet)
other_nodes = [n for n in txnPoolNodeSet if n != master_primary]
delay_3pc = 10
delay_3pc_messages(txnPoolNodeSet, 0, delay_3pc)
sent_batches = 2
sdk_send_random_requests(looper, sdk_pool_handle, sdk_wallet_client,
sent_batches * tconf.Max3PCBatchSize)
def chk1():
t_root, s_root = check_uncommitteds_equal(other_nodes)
assert master_primary.domainLedger.uncommittedRootHash != t_root
assert master_primary.states[DOMAIN_LEDGER_ID].headHash != s_root
looper.run(eventually(chk1, retryWait=1))
timeout = tconf.PerfCheckFreq + \
waits.expectedPoolElectionTimeout(len(txnPoolNodeSet))
waitForViewChange(looper,
txnPoolNodeSet,
old_view_no + 1,
customTimeout=timeout)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
check_uncommitteds_equal(txnPoolNodeSet)
reset_delays_and_process_delayeds(txnPoolNodeSet)
sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_client,
2 * Max3PCBatchSize,
add_delay_to_timeout=delay_3pc)
ensure_all_nodes_have_same_data(looper, nodes=txnPoolNodeSet)
def test_number_txns_in_catchup_and_vc_queue_valid(looper,
txnPoolNodeSet,
tconf,
sdk_pool_handle,
sdk_wallet_steward):
num_txns = 5
master_node = get_master_primary_node(txnPoolNodeSet)
old_view = master_node.viewNo
expected_view_no = old_view + 1
disconnect_node_and_ensure_disconnected(looper, txnPoolNodeSet, master_node, stopNode=False)
looper.run(eventually(checkViewNoForNodes, txnPoolNodeSet[1:], expected_view_no, retryWait=1,
timeout=tconf.VIEW_CHANGE_TIMEOUT))
sdk_pool_refresh(looper, sdk_pool_handle)
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_steward, num_txns)
reconnect_node_and_ensure_connected(looper, txnPoolNodeSet, master_node)
waitNodeDataEquality(looper, master_node, *txnPoolNodeSet[-1:])
latest_info = master_node._info_tool.info
assert latest_info['Node_info']['Catchup_status']['Number_txns_in_catchup'][1] == num_txns
assert latest_info['Node_info']['View_change_status']['View_No'] == expected_view_no
node_names = [n.name for n in txnPoolNodeSet[1:]]
for node_name in node_names:
assert latest_info['Node_info']['View_change_status']['VCDone_queue'][node_name][0] == master_node.master_primary_name
assert latest_info['Node_info']['View_change_status']['VCDone_queue'][node_name][1]
assert latest_info['Node_info']['View_change_status']['Last_complete_view_no'] == expected_view_no
def test_primary_receives_delayed_prepares(looper, txnPoolNodeSet,
sdk_wallet_client, sdk_pool_handle):
"""
Primary gets all PREPAREs after COMMITs
"""
delay = 50
primary_node = get_master_primary_node(txnPoolNodeSet)
other_nodes = [n for n in txnPoolNodeSet if n != primary_node]
primary_node.nodeIbStasher.delay(pDelay(delay, 0))
sdk_send_random_and_check(looper,
txnPoolNodeSet,
sdk_pool_handle,
sdk_wallet_client,
count=10)
for node in other_nodes:
assert node.master_replica.prePrepares
assert node.master_replica.prepares
assert node.master_replica.commits
assert primary_node.master_replica.sentPrePrepares
assert not primary_node.master_replica.prepares
assert primary_node.master_replica.commits
def setup(txnPoolNodeSet, looper):
m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
initial_view_no = waitForViewChange(looper, txnPoolNodeSet)
timeout_callback_stats = _check_view_change_completed_stats(txnPoolNodeSet)
return m_primary_node, initial_view_no, timeout_callback_stats
def setup(txnPoolNodeSet, looper):
m_primary_node = get_master_primary_node(list(txnPoolNodeSet))
initial_view_no = waitForViewChange(looper, txnPoolNodeSet)
timeout_callback_stats = _check_view_change_completed_stats(txnPoolNodeSet)
return m_primary_node, initial_view_no, timeout_callback_stats
def disconnect_master_primary(nodes):
pr_node = get_master_primary_node(nodes)
for node in nodes:
if node != pr_node:
node.nodestack.getRemote(pr_node.nodestack.name).disconnect()
return pr_node
def slow_nodes(node_set):
return [get_master_primary_node(node_set),
get_first_master_non_primary_node(node_set)]
def test_view_not_changed_when_short_disconnection(txnPoolNodeSet, looper,
sdk_pool_handle, sdk_wallet_client, tconf):
"""
When primary is disconnected but not long enough to trigger the timeout,
view change should not happen
"""
pr_node = get_master_primary_node(txnPoolNodeSet)
view_no = checkViewNoForNodes(txnPoolNodeSet)
lost_pr_calls = {node.name: node.spylog.count(
node.lost_master_primary.__name__) for node in txnPoolNodeSet
if node != pr_node}
prp_inst_chg_calls = {node.name: node.spylog.count(
node.propose_view_change.__name__) for node in txnPoolNodeSet
if node != pr_node}
recv_inst_chg_calls = {node.name: node.spylog.count(
node.view_changer.process_instance_change_msg.__name__) for node in txnPoolNodeSet
if node != pr_node}
def chk1():
# Check that non-primary nodes detects losing connection with
# primary
for node in txnPoolNodeSet:
if node != pr_node:
assert node.spylog.count(node.lost_master_primary.__name__) \
> lost_pr_calls[node.name]
def chk2():
# Schedule an instance change but do not send it
# since primary joins again
for node in txnPoolNodeSet:
if node != pr_node:
assert node.spylog.count(node.propose_view_change.__name__) \
> prp_inst_chg_calls[node.name]
assert node.view_changer.spylog.count(node.view_changer.process_instance_change_msg.__name__) \
== recv_inst_chg_calls[node.name]
# Disconnect master's primary
for node in txnPoolNodeSet:
if node != pr_node:
node.nodestack.getRemote(pr_node.nodestack.name).disconnect()
timeout = min(tconf.ToleratePrimaryDisconnection - 1, 1)
looper.run(eventually(chk1, retryWait=.2, timeout=timeout))
# Reconnect master's primary
for node in txnPoolNodeSet:
if node != pr_node:
node.nodestack.retryDisconnected()
looper.run(eventually(chk2, retryWait=.2, timeout=timeout + 1))
def chk3():
# Check the view does not change
with pytest.raises(AssertionError):
assert checkViewNoForNodes(txnPoolNodeSet) == view_no + 1
looper.run(eventually(chk3, retryWait=1, timeout=10))
# Send some requests and make sure the request execute
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_client, 5)
def test_view_change_after_back_to_quorum_with_disconnected_primary(txnPoolNodeSet, looper,
sdk_pool_handle,
sdk_wallet_client,
tdir, tconf, allPluginsPath):
assert len(txnPoolNodeSet) == 4
pr_node = get_master_primary_node(txnPoolNodeSet)
assert pr_node.name == "Alpha"
# 1. Initiate view change be primary (Alpha) restart
nodes = ensure_view_change_by_primary_restart(looper,
txnPoolNodeSet,
tconf,
tdir,
allPluginsPath,
customTimeout=2 * tconf.VIEW_CHANGE_TIMEOUT)
# Now primary should be Beta
pr_node = get_master_primary_node(nodes)
assert pr_node.name == "Beta"
# 2. Stop non-primary node Delta, no any view changes are expected
non_primary_to_stop = [n for n in nodes if n.name == "Delta"][0]
disconnect_node_and_ensure_disconnected(
looper, txnPoolNodeSet, non_primary_to_stop)
looper.removeProdable(non_primary_to_stop)
remaining_nodes = list(set(nodes) - {non_primary_to_stop})
# Primary is going to be stopped, remember instance change messages count
# to ensure that no view change happened as number of connected nodes is less
# than quorum.
ic_cnt = {}
for n in remaining_nodes:
ic_cnt[n.name] = n.view_changer.spylog.count(ViewChanger.sendInstanceChange.__name__)
# 3. Disconnect primary
disconnect_node_and_ensure_disconnected(
looper, remaining_nodes, pr_node)
looper.removeProdable(pr_node)
# Wait for more than ToleratePrimaryDisconnection timeout and check that no IC messages presented.
looper.runFor(tconf.ToleratePrimaryDisconnection + 5)
remaining_nodes = list(set(remaining_nodes) - {pr_node})
for n in remaining_nodes:
assert ic_cnt[n.name] == n.view_changer.spylog.count(ViewChanger.sendInstanceChange.__name__)
view_no = checkViewNoForNodes(remaining_nodes)
# 4. Start Delta (non-primary), now primary (Beta) is disconnected but there is a quorum
# to choose a new one.
restartedNode = start_stopped_node(non_primary_to_stop, looper, tconf,
tdir, allPluginsPath,
delay_instance_change_msgs=False)
remaining_nodes = remaining_nodes + [restartedNode]
# 5. Check that view change happened.
waitForViewChange(looper, remaining_nodes, expectedViewNo=(view_no + 1),
customTimeout=2 * tconf.VIEW_CHANGE_TIMEOUT)
# ensure pool is working properly
sdk_send_random_and_check(looper, remaining_nodes, sdk_pool_handle,
sdk_wallet_client, 3)
ensure_all_nodes_have_same_data(looper, nodes=remaining_nodes)
def test_view_not_changed_when_primary_disconnected_from_less_than_quorum(
txnPoolNodeSet, looper, sdk_pool_handle, sdk_wallet_client):
"""
Less than quorum nodes lose connection with primary, this should not
trigger view change as the protocol can move ahead
"""
pr_node = get_master_primary_node(txnPoolNodeSet)
npr = getNonPrimaryReplicas(txnPoolNodeSet, 0)
partitioned_rep = npr[0]
partitioned_node = partitioned_rep.node
lost_pr_calls = partitioned_node.spylog.count(
partitioned_node.lost_master_primary.__name__)
recv_inst_chg_calls = {node.name: node.spylog.count(
node.view_changer.process_instance_change_msg.__name__) for node in txnPoolNodeSet
if node != partitioned_node and node != pr_node}
view_no = checkViewNoForNodes(txnPoolNodeSet)
orig_retry_meth = partitioned_node.nodestack.retryDisconnected
def wont_retry(self, exclude=None):
# Do not attempt to retry connection
pass
# simulating a partition here
# Disconnect a node from only the primary of the master and dont retry to
# connect to it
partitioned_node.nodestack.retryDisconnected = types.MethodType(
wont_retry, partitioned_node.nodestack)
r = partitioned_node.nodestack.getRemote(pr_node.nodestack.name)
r.disconnect()
def chk1():
# Check that the partitioned node detects losing connection with
# primary and sends an instance change which is received by other
# nodes except the primary (since its disconnected from primary)
assert partitioned_node.spylog.count(
partitioned_node.lost_master_primary.__name__) > lost_pr_calls
for node in txnPoolNodeSet:
if node != partitioned_node and node != pr_node:
assert node.view_changer.spylog.count(
node.view_changer.process_instance_change_msg.__name__) > recv_inst_chg_calls[node.name]
looper.run(eventually(chk1, retryWait=1, timeout=10))
def chk2():
# Check the view does not change
with pytest.raises(AssertionError):
assert checkViewNoForNodes(txnPoolNodeSet) == view_no + 1
looper.run(eventually(chk2, retryWait=1, timeout=10))
# Send some requests and make sure the request execute
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_client, 5)
# Repair the connection so the node is no longer partitioned
partitioned_node.nodestack.retryDisconnected = types.MethodType(
orig_retry_meth, partitioned_node.nodestack)
# Send some requests and make sure the request execute
sdk_send_random_and_check(looper, txnPoolNodeSet, sdk_pool_handle, sdk_wallet_client, 5)
# Partitioned node should have the same ledger and state as others
# eventually
waitNodeDataEquality(looper, partitioned_node,
*[n for n in txnPoolNodeSet if n != partitioned_node])