Adjust and enable some ControlConnection integration tests
#255
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muzarski
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Lorak-mmk
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Apr 16, 2025
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Note: As we can see, rust-driver does not provide the node address
either in the log message or in the error type.
This is something we should consider adding to rust-driver.
Please open an issue about it
- TopologyChange <- some error during
ccm addcommand (need to investigate)
In a follow up or before merging this?
Ok.
I'll open separate issue regarding this. I'm not sure how much effort this would require - is it just a fix on cpp-rust-driver side? Or maybe there is some bug in ccm. Who knows... |
At the time of writing this, I confused the address translation with DNS address resolution. In addition, the `CASS_ERROR_LIB_HOST_RESOLUTION` in cpp-driver is only returned from `cass_cluster_set_local_address()` when unparsable ip address is provided.
Motivation (based on cpp-driver):
1. UNABLE_TO_CONNECT should only be returned when user tries to call
`cass_session_connect` on a session that is already connecting, connected or closing.
We already handle this case in `session.rs`.
```
let mut session_guard = session_opt.write().await;
if session_guard.is_some() {
return Err((
CassError::CASS_ERROR_LIB_UNABLE_TO_CONNECT,
"Already connecting, closing, or connected".msg(),
));
}
```
2. NO_HOSTS_AVAILABLE is returned in all places where driver cannot reach
one of the nodes. This includes:
- pool is broken
- connection is broken
- connection is closed
- connection is refused
- empty LB plan
- user provided empty list of contact points
... etc.
Thanks to this change, we will also be able to enable new integration tests
that expect `NO_HOSTS_AVAILABLE` error.
As a side note: as you can see, the NO_HOST_AVAILABLE is mapped from a lot of
Rust error types/variants. I believe we should increase the granularity of
CassError enum and add more error variants. This way we will be able to
define more direct mapping between Rust and cpp-rust-driver errors.
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Lorak-mmk
approved these changes
Apr 16, 2025
wprzytula
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Apr 19, 2025
Comment on lines
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| logger_.add_critera("Could not fetch metadata, error: " | ||
| "Control connection pool error: The pool is broken; " | ||
| "Last connection failed with: Invalid argument (os error 22)"); |
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BTW, do we target Windows? If so, then we should run unit & integration tests in the CI on Windows, too.
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I believe we want to support it eventually: #130
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v1.1: Addressed @wprzytula comments. |
wprzytula
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Apr 19, 2025
I tried to map the underlying errors as precisely as possible (as of now). The most important one is the `MetadataError::ConnectionPoolError` which should be mapped to `LIB_NO_HOSTS_AVAILABLE`. This is required by the test.
We decided that `cass_cluster_set_local_address()` should return LIB_BAD_PARAMS in case user provides unparsable ip address.
Note: As we can see, rust-driver does not provide the node address either in the log message or in the error type. This is something we should consider adding to rust-driver.
Tests enabled: - ConnectUsingInvalidIpAddress - ConnectUsingInvalidPort - ConnectUsingUnresolvableLocalIpAddress - ConnectUsingUnbindableLocalIpAddress - ConnectUsingValidLocalIpAddressButInvalidRemote Tests that we keep disabled: - TopologyChange <- some error during `ccm add` command (need to investigate) - FullOutage <- requires cass_cluster_set_constant_reconnect - TerminatedUsingMultipleIoThreadsWithError <- requires cass_cluster_set_num_threads_io
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wprzytula
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Ref: #132
Depends on: #254. Start review from
cass_error: remove misleading comment.To enable the tests I firstly needed to do some adjustments:
UNABLE_TO_CONNECTerror in places whereLIB_NO_HOSTS_AVAILABLEshould be returned. This is adjusted.cass_cluster_set_local_addressto returnLIB_HOST_RESOLUTIONwhen unparsable ip address is provided. We decided that it should returnLIB_BAD_PARAMSin such case - I adjusted the integration test case to this.Tests
Tests enabled:
Tests that we keep disabled:
ccm addcommand (need to investigate)Pre-review checklist
[ ] I have implemented Rust unit tests for the features/changes introduced..github/workflows/build.ymlingtest_filter..github/workflows/cassandra.ymlingtest_filter.