CI Failure (TimeoutError('Redpanda failed to terminate in 30 seconds')) in PartitionBalancerTest.test_unavailable_nodes

[andijcr]

https://buildkite.com/redpanda/redpanda/builds/30936#01889eda-46c8-40d5-a056-c12fbbf6ec0e

Module: rptest.tests.partition_balancer_test
Class:  PartitionBalancerTest
Method: test_unavailable_nodes

test_id:    rptest.tests.partition_balancer_test.PartitionBalancerTest.test_unavailable_nodes
status:     FAIL
run time:   3 minutes 29.600 seconds


    TimeoutError('Redpanda failed to terminate in 30 seconds')
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/ducktape/tests/runner_client.py", line 135, in run
    data = self.run_test()
  File "/usr/local/lib/python3.10/dist-packages/ducktape/tests/runner_client.py", line 227, in run_test
    return self.test_context.function(self.test)
  File "/root/tests/rptest/utils/mode_checks.py", line 63, in f
    return func(*args, **kwargs)
  File "/root/tests/rptest/services/cluster.py", line 79, in wrapped
    r = f(self, *args, **kwargs)
  File "/root/tests/rptest/tests/partition_balancer_test.py", line 368, in test_unavailable_nodes
    ns.make_unavailable(node)
  File "/root/tests/rptest/tests/partition_balancer_test.py", line 272, in make_unavailable
    self.f_injector._start_func(self.cur_failure.type)(
  File "/root/tests/rptest/services/failure_injector.py", line 213, in _terminate
    wait_until(lambda: self.redpanda.redpanda_pid(node) == None,
  File "/usr/local/lib/python3.10/dist-packages/ducktape/utils/util.py", line 57, in wait_until
    raise TimeoutError(err_msg() if callable(err_msg) else err_msg) from last_exception
ducktape.errors.TimeoutError: Redpanda failed to terminate in 30 seconds

[michael-redpanda]

Different test, but same error: rptest.tests.partition_balancer_test.PartitionBalancerTest.test_rack_awareness
https://buildkite.com/redpanda/redpanda/builds/31065#0188ae61-4f9c-4472-8135-2fb828fb5caa

[michael-redpanda]

https://buildkite.com/redpanda/redpanda/builds/31340#0188bdc6-4f04-4609-b2d9-74eaca805482

[bharathv]

This one also seems related to #11474, possibly fixed by the revert, lets reopen if needed.