Error: no RPC connection" when trying to run Bitcoin Core functional tests #28000

1. 
   naftalimurgor commented at 11:58 am on June 29, 2023: none

   Motivation

   I’m getting a strange error running tests under /src/test/functional/ with the following error:

    0Temporary test directory at /tmp/test_runner_₿_🏃_20220504_123152
    1Running Unit Tests for Test Framework Modules
    2..........
    3----------------------------------------------------------------------
    4Ran 10 tests in 0.614s
    5
    6OK
    7Traceback (most recent call last):
    8  File "/usr/src/bitcoin/test/functional/create_cache.py", line 27, in <module>
    9    CreateCache().main()
   10  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 156, in main
   11    exit_code = self.shutdown()
   12  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 311, in shutdown
   13    self.stop_nodes()
   14  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 567, in stop_nodes
   15    node.stop_node(wait=wait, wait_until_stopped=False)
   16  File "/usr/src/bitcoin/test/functional/test_framework/test_node.py", line 336, in stop_node
   17    self.stop(wait=wait)
   18  File "/usr/src/bitcoin/test/functional/test_framework/test_node.py", line 184, in __getattr__
   19    assert self.rpc_connected and self.rpc is not None, self._node_msg("Error: no RPC connection")
   20AssertionError: [node 0] Error: no RPC connection
   212022-05-04T19:31:53.315000Z TestFramework (INFO): Initializing test directory /tmp/test_runner_₿_🏃_20220504_123152/cache
   222022-05-04T19:31:56.079000Z TestFramework (ERROR): Unexpected exception caught during testing
   23Traceback (most recent call last):
   24  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 132, in main
   25    self.setup()
   26  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 294, in setup
   27    self.setup_chain()
   28  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 385, in setup_chain
   29    self._initialize_chain()
   30  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 777, in _initialize_chain
   31    self.start_node(CACHE_NODE_ID)
   32  File "/usr/src/bitcoin/test/functional/test_framework/test_framework.py", line 534, in start_node
   33    node.wait_for_rpc_connection()
   34  File "/usr/src/bitcoin/test/functional/test_framework/test_node.py", line 225, in wait_for_rpc_connection
   35    raise FailedToStartError(self._node_msg(
   36test_framework.test_node.FailedToStartError: [node 0] bitcoind exited with status 3 during initialization
   372022-05-04T19:31:56.133000Z TestFramework (INFO): Stopping nodes
   38[node 0] Cleaning up leftover process
   39Traceback (most recent call last):
   40  File "test/functional/test_runner.py", line 832, in <module>
   41    main()
   42  File "test/functional/test_runner.py", line 471, in main
   43    run_tests(
   44  File "test/functional/test_runner.py", line 525, in run_tests
   45    subprocess.check_output([sys.executable, tests_dir + 'create_cache.py'] + flags + ["--tmpdir=%s/cache" % tmpdir])
   46  File "/usr/lib/python3.8/subprocess.py", line 415, in check_output
   47    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
   48  File "/usr/lib/python3.8/subprocess.py", line 516, in run
   49    raise CalledProcessError(retcode, process.args,
   50subprocess.CalledProcessError: Command '['/usr/bin/python3', '/usr/src/bitcoin/test/functional/create_cache.py', '--cachedir=/usr/src/bitcoin/test/cache', '--configfile=/usr/src/bitcoin/test/functional/../config.ini', '--tmpdir=/tmp/test_runner_₿_🏃_20220504_123152/cache']' returned non-zero exit status 1.
   51`\
   

   any pointers are highly appreciated

   Possible solution

   No response

   Useful Skills

   • RPC/P2P layer
   • Debugging
   • overall understanding of Bitcoin Core

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2. naftalimurgor added the label good first issue on Jun 29, 2023
3. 
   maflcko commented at 12:24 pm on June 29, 2023: member

   Can you try with:

    0diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
    1index 5111d88e15..1e605e00b8 100755
    2--- a/test/functional/test_framework/test_node.py
    3+++ b/test/functional/test_framework/test_node.py
    4@@ -232,6 +232,8 @@ class TestNode():
    5         poll_per_s = 4
    6         for _ in range(poll_per_s * self.rpc_timeout):
    7             if self.process.poll() is not None:
    8+                self.stderr.seek(0)
    9+                print(self.stderr.read())
   10                 raise FailedToStartError(self._node_msg(
   11                     'bitcoind exited with status {} during initialization'.format(self.process.returncode)))
   12             try:
   

4. 
   maflcko commented at 7:53 pm on June 29, 2023: member

   Let us know if this is still an issue
5. maflcko closed this on Jun 29, 2023

   ---

6. bitcoin locked this on Jun 28, 2024

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