helper.completeOperation("reindex");
        // Should NOT delete because owner is node2@host2, not node1@host1
        assertFalse(deleteCalled.get());
    }

    @Test
    public void test_completeOperation_notFound() {
        setupMockFessConfig();
        final CoordinatorHelper helper = createCapturingHelper("node1@host1", null, null, createMockResponse(404, "{}"));

        // Should complete safely without throwing