`Connection refused` networking test failure about snarkos HOT 2 CLOSED

     Running /home/ubuntu/snarkOS/target/debug/deps/server_connection_handler-340a7b00af4d0aa5

running 6 tests
test server_connection_handler::gossiped_peer_disconnect ... ok
test server_connection_handler::gossiped_peer_connect ... ok
test server_connection_handler::memory_pool_interval ... FAILED
test server_connection_handler::peer_disconnect ... ok
test server_connection_handler::peer_connect ... ok
test server_connection_handler::sync_node_disconnect ... ok

failures:

---- server_connection_handler::memory_pool_interval stdout ----
thread 'server_connection_handler::memory_pool_interval' panicked at 'called `Result::unwrap()` on an `Err` value: Crate("std::io", "Os { code: 111, kind: ConnectionRefused, message: \"Connection refused\" }")', /home/ubuntu/snarkOS/network/src/test_data/mod.rs:73:5
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1063
   5: std::io::Write::write_fmt
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/io/mod.rs:1426
   6: std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt
             at src/libstd/io/impls.rs:156
   7: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   8: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   9: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:204
  10: std::panicking::default_hook
             at src/libstd/panicking.rs:221
  11: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:470
  12: rust_begin_unwind
             at src/libstd/panicking.rs:378
  13: core::panicking::panic_fmt
             at src/libcore/panicking.rs:85
  14: core::option::expect_none_failed
             at src/libcore/option.rs:1211
  15: core::result::Result<T,E>::unwrap
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libcore/result.rs:1003
  16: snarkos_network::test_data::accept_channel::{{closure}}
             at ./src/test_data/mod.rs:73
  17: <std::future::GenFuture<T> as core::future::future::Future>::poll
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/future.rs:44
  18: std::future::poll_with_tls_context
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/future.rs:102
  19: server_connection_handler::server_connection_handler::memory_pool_interval::{{closure}}::{{closure}}
             at network/tests/server_connection_handler.rs:313
  20: <std::future::GenFuture<T> as core::future::future::Future>::poll
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/future.rs:44
  21: tokio::runtime::basic_scheduler::BasicScheduler<P>::block_on::{{closure}}::{{closure}}
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/basic_scheduler.rs:131
  22: tokio::coop::with_budget::{{closure}}
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/coop.rs:127
  23: std::thread::local::LocalKey<T>::try_with
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/thread/local.rs:262
  24: std::thread::local::LocalKey<T>::with
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/thread/local.rs:239
  25: tokio::coop::with_budget
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/coop.rs:120
  26: tokio::coop::budget
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/coop.rs:96
  27: tokio::runtime::enter::Enter::block_on
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/enter.rs:163
  28: tokio::runtime::thread_pool::ThreadPool::block_on
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/thread_pool/mod.rs:82
  29: tokio::runtime::Runtime::block_on::{{closure}}
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/mod.rs:446
  30: tokio::runtime::context::enter
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/context.rs:72
  31: tokio::runtime::handle::Handle::enter
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/handle.rs:76
  32: tokio::runtime::Runtime::block_on
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.21/src/runtime/mod.rs:441
  33: server_connection_handler::server_connection_handler::memory_pool_interval::{{closure}}
             at network/tests/server_connection_handler.rs:286
  34: core::ops::function::FnOnce::call_once
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libcore/ops/function.rs:232
  35: serial_test::serial_core
             at /home/ubuntu/.cargo/registry/src/github.com-1ecc6299db9ec823/serial_test-0.4.0/src/lib.rs:64
  36: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/liballoc/boxed.rs:1017
  37: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/panic.rs:318
  38: std::panicking::try::do_call
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/panicking.rs:303
  39: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:86
  40: std::panicking::try
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/panicking.rs:281
  41: std::panic::catch_unwind
             at /rustc/8d69840ab92ea7f4d323420088dd8c9775f180cd/src/libstd/panic.rs:394
  42: test::run_test_in_process
             at src/libtest/lib.rs:542
  43: test::run_test::run_test_inner::{{closure}}
             at src/libtest/lib.rs:451
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.


failures:
    server_connection_handler::memory_pool_interval

test result: FAILED. 5 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out

error: test failed, to rerun pass '--test server_connection_handler'