CI Failure (key symptom) in WriteCachingMetricsTest.test_request_metrics

[vbotbuildovich]

https://buildkite.com/redpanda/vtools/builds/13566

Module: rptest.tests.write_caching_test
Class: WriteCachingMetricsTest
Method: test_request_metrics

test_id:    WriteCachingMetricsTest.test_request_metrics
status:     FAIL
run time:   6.765 seconds

RemoteCommandError({'ssh_config': {'host': 'ducktape-node-6-formerly-inspired-penguin', 'hostname': '10.168.0.26', 'user': 'root', 'port': 22, 'password': None, 'identityfile': '/home/ubuntu/.ssh/id_rsa'}, 'hostname': 'ducktape-node-6-formerly-inspired-penguin', 'ssh_hostname': '10.168.0.26', 'user': 'root', 'externally_routable_ip': '34.94.90.143', '_logger': <Logger rptest.tests.write_caching_test.WriteCachingMetricsTest.test_request_metrics-537 (DEBUG)>, 'os': 'linux', '_ssh_client': <paramiko.client.SSHClient object at 0x7b508d6e0790>, '_sftp_client': <paramiko.sftp_client.SFTPClient object at 0x7b508d6e27d0>, '_custom_ssh_exception_checks': None}, 'kill -9 13620\n', 1, b'bash: line 1: kill: (13620) - No such process\n')
Traceback (most recent call last):
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/tests/runner_client.py", line 184, in _do_run
    data = self.run_test()
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/tests/runner_client.py", line 276, in run_test
    return self.test_context.function(self.test)
  File "/home/ubuntu/redpanda/tests/rptest/services/cluster.py", line 103, in wrapped
    r = f(self, *args, **kwargs)
  File "/home/ubuntu/redpanda/tests/rptest/tests/write_caching_test.py", line 237, in test_request_metrics
    produce_events(num_events_with_flush)
  File "/home/ubuntu/redpanda/tests/rptest/tests/write_caching_test.py", line 209, in produce_events
    producer.stop()
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/services/background_thread.py", line 84, in stop
    super(BackgroundThreadService, self).stop()
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/services/service.py", line 310, in stop
    self.stop_node(node, **kwargs)
  File "/home/ubuntu/redpanda/tests/rptest/services/rpk_producer.py", line 92, in stop_node
    node.account.kill_process("rpk", clean_shutdown=False)
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/cluster/remoteaccount.py", line 430, in kill_process
    self.signal(pid, sig, allow_fail=allow_fail)
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/cluster/remoteaccount.py", line 418, in signal
    self.ssh(cmd, allow_fail=allow_fail)
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/cluster/remoteaccount.py", line 41, in wrapper
    return method(self, *args, **kwargs)
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/cluster/remoteaccount.py", line 300, in ssh
    raise RemoteCommandError(self, cmd, exit_status, stderr.read())
ducktape.cluster.remoteaccount.RemoteCommandError: root@ducktape-node-6-formerly-inspired-penguin: Command 'kill -9 13620
' returned non-zero exit status 1. Remote error message: b'bash: line 1: kill: (13620) - No such process\n'

JIRA Link: CORE-2832

[rpdevmp]

Duplicate of #18337