Core Validation Fails - Multi Threading & Python 3.11

[jhanm12]

Environment

• Python version: 3.11.4 (Wanted to check, if you would be able to provide support to this version as well?)
• PyKwalify version: 1.8.0

Steps to Reproduce

1. This issue is reproduced in a multi threading process with 2 or more threads doing the validation in a parallel process.
2. It passes via a single instance.
3. It also passes, if we check it via pdb in a multi threaded processes.

Schema

For any Yaml Schema.

Data

For any Json Data.

Expected Behavior

It is expected to pass via multi threading case as well. (Earlier, with Python 3.6.7 & PyKwalify 1.5.2 - It works fine.)

Observed Behavior

It randomly passes on some threads & fails on the rest.

-Error----2024-02-28T09-59-33.948[Interface-Creation-f3a-r1-pod17][HealthCheckAndRecovery]> Exception Occured during Interface Breakout on router f3a-r1-pod17: while parsing a block node
expected the node content, but found '<stream start>'
  in "None", line 1, column 1
Traceback (most recent call last):
  File "/auto/cafy/CaReS-2/scripts/pod_health_check_and_recovery.py", line 293, in interfaces_creation_and_unshut
    optics_object = Optics(device=router, mode='cli', name="optics")
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/infra_framework/cafykit/lib/feature_lib/__init__.py", line 896, in __new__
    trunner = klass(*args, **kwargs)
              ^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_spitfire_thinxr_cli.py", line 20, in __init__
    super().__init__(device, *args, **kwargs)
  File "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_thinxr_cli.py", line 22, in __init__
    super().__init__(device, *args, **kwargs)
  File "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_xr_cli.py", line 31, in __init__
    super().__init__(device, *args, **kwargs)
  File "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_base.py", line 34, in __init__
    Core(source_file=os.path.join(os.path.dirname(__file__), 'optics.json'), schema_files=[os.path.join(os.path.dirname(__file__), 'optics_schema.yaml')]).validate(raise_exception=True)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/pykwalify/core.py", line 118, in __init__
    data = yml.load(stream)
           ^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/main.py", line 451, in load
    return constructor.get_single_data()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/constructor.py", line 114, in get_single_data
    node = self.composer.get_single_node()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 72, in get_single_node
    document = self.compose_document()
               ^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 94, in compose_document
    node = self.compose_node(None, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 130, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 211, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 130, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 211, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 130, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 211, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 130, in compose_node
    node = self.compose_mapping_node(anchor)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 211, in compose_mapping_node
    item_value = self.compose_node(node, item_key)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 106, in compose_node
    if self.parser.check_event(AliasEvent):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 141, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 639, in parse_block_mapping_value
    return self.parse_block_node_or_indentless_sequence()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 355, in parse_block_node_or_indentless_sequence
    return self.parse_node(block=True, indentless_sequence=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 516, in parse_node
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a block node
expected the node content, but found '<stream start>'
  in "None", line 1, column 1

File "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_base.py", line 34, in __init__
    Core(source_file=os.path.join(os.path.dirname(__file__), 'optics.json'), schema_files=[os.path.join(os.path.dirname(__file__), 'optics_schema.yaml')]).validate(raise_exception=True)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/pykwalify/core.py", line 118, in __init__
    data = yml.load(stream)
           ^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/main.py", line 451, in load
    return constructor.get_single_data()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/constructor.py", line 114, in get_single_data
    node = self.composer.get_single_node()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/composer.py", line 67, in get_single_node
    self.parser.get_event()
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 161, in get_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 678, in parse_flow_sequence_entry
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a flow sequence
  in "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_schema.yaml", line 37, column 15
expected ',' or ']', but got '<scalar>'

 File "/auto/cafy/release/24.08.11/rhel8-24.08.11/lib/python3.11/site-packages/ruamel/yaml/parser.py", line 614, in parse_block_mapping_key
    raise ParserError(
ruamel.yaml.parser.ParserError: while parsing a block mapping
  in "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_schema.yaml", line 20, column 7
expected <block end>, but found '<block mapping start>'
  in "/auto/cafy/infra_framework/cafykit/lib/hw/optics/optics_schema.yaml", line 86, column 9
-Error----2024-02-28T09-59-33.948[Interface-Creation-f3a-r1-pod17][HealthCheckAndRecovery]> Exception Occured during Interface Breakout on router f3a-r1-pod17: while parsing a block node
expected the node content, but found '<stream start>'

[jhanm12]

@Grokzen Can you please help here? Please, let me know if you need more details.