xds testing: disable fail_on_failed_rpc check

Fixing this needs further work to not share resources between tests.
pull/23909/head
Menghan Li 4 years ago
parent 0649026e8a
commit 1eb137b28d
  1. 33
      tools/run_tests/run_xds_tests.py

@ -1717,25 +1717,20 @@ try:
else:
metadata_to_send = '--metadata=""'
if test_case in _TESTS_TO_FAIL_ON_RPC_FAILURE:
# TODO(ericgribkoff) Unconditional wait is recommended by TD
# team when reusing backend resources after config changes
# between test cases, as we are doing here. This should address
# flakiness issues with these tests; other attempts to deflake
# (such as waiting for the first successful RPC before failing
# on any subsequent failures) were insufficient because, due to
# propagation delays, we may initially see an RPC succeed to the
# expected backends but due to a stale configuration: e.g., test
# A (1) routes traffic to MIG A, then (2) switches to MIG B,
# then (3) back to MIG A. Test B begins running and sees RPCs
# going to MIG A, as expected. However, due to propagation
# delays, Test B is actually seeing the stale config from step
# (1), and then fails when it gets update (2) unexpectedly
# switching to MIG B.
time.sleep(200)
fail_on_failed_rpc = '--fail_on_failed_rpc=true'
else:
fail_on_failed_rpc = '--fail_on_failed_rpc=false'
# TODO(ericgribkoff) Temporarily disable fail_on_failed_rpc checks
# in the client. This means we will ignore intermittent RPC
# failures (but this framework still checks that the final result
# is as expected).
#
# Reason for disabling this is, the resources are shared by
# multiple tests, and a change in previous test could be delayed
# until the second test starts. The second test may see
# intermittent failures because of that.
#
# A fix is to not share resources between tests (though that does
# mean the tests will be significantly slower due to creating new
# resources).
fail_on_failed_rpc = ''
client_cmd_formatted = args.client_cmd.format(
server_uri=server_uri,

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