def test_auto_reconnect_after_impalad_died(self):
"""Test reconnect after restarting the remote impalad without using connect;"""
# Use pexpect instead of ImpalaShell() since after using get_result() in ImpalaShell()
# to check Disconnect, send_cmd() will no longer have any effect so we can not check
# reconnect.
impalad = ImpaladService(socket.getfqdn())
# Iterate over test vector within test function to avoid restarting cluster.
for vector in\
[ImpalaTestVector([value]) for value in create_client_protocol_dimension()]:
cmd = get_shell_cmd(vector)
proc = pexpect.spawn(cmd[0], cmd[1:])
proc.expect("{0}] default>".format(get_impalad_port(vector)))
# ImpalaShell startup may issue query to get server info - get num queries after
# starting shell.
start_num_queries = impalad.get_metric_value(NUM_QUERIES)
proc.sendline("use tpch;")
# wait for the USE command to finish
impalad.wait_for_metric_value(NUM_QUERIES, start_num_queries + 1)
assert impalad.wait_for_num_in_flight_queries(0)
# Disconnect
self.cluster.impalads[0].kill()
proc.sendline("show tables;")
# Search from [1:] since the square brackets "[]" are special characters in regex
proc.expect(ImpalaShellClass.DISCONNECTED_PROMPT[1:])
# Restarting Impalad
self.cluster.impalads[0].start()
# Check reconnect
proc.sendline("show tables;")
proc.expect("nation")
proc.expect("{0}] tpch>".format(get_impalad_port(vector)))
proc.sendeof()
proc.wait()
# Ensure no sessions or queries are left dangling.
verifier = MetricVerifier(self.impalad_test_service)
verifier.verify_metrics_are_zero()
def test_metrics_are_zero(self):
"""Test that all the metric in METRIC_LIST are 0"""
verifier = MetricVerifier(self.impalad_test_service)
verifier.verify_metrics_are_zero()
def test_metrics_are_zero(self): """Test that all the metric in METRIC_LIST are 0""" verifier = MetricVerifier(self.impalad_test_service) verifier.verify_metrics_are_zero()