3a901a1bf3
The test_node_operation_during_view_building() setup used servers_add() to bring up all initial nodes concurrently. That is more aggressive than this test needs, and it makes the setup sensitive to bootstrap/topology races and to single-node startup failures. The add_server has notes about this case. In the decommission case in particular, the test starts with 4 nodes and only later exercises the node operation under test. When all 4 nodes are started concurrently, a failure in one node during initial bootstrap can cause the whole batch add to fail before the test even reaches the decommission step. This showed up as Failed to add servers, with later nodes timing out while waiting for topology/IP mapping after one of the early nodes shut down. Switch the initial cluster setup to repeated server_add() calls. This keeps the topology changes serialized, allows each node to fully join before the next one starts, and matches the actual needs of the test. The change does not alter the scenario being tested; it only makes the test setup less fragile and easier to diagnose when a node startup problem happens.
Scylla in-source tests.
For details on how to run the tests, see docs/dev/testing.md
Shared C++ utils, libraries are in lib/, for Python - pylib/
alternator - Python tests which connect to a single server and use the DynamoDB API unit, boost, raft - unit tests in C++ cqlpy - Python tests which connect to a single server and use CQL topology* - tests that set up clusters and add/remove nodes cql - approval tests that use CQL and pre-recorded output rest_api - tests for Scylla REST API Port 9000 scylla-gdb - tests for scylla-gdb.py helper script nodetool - tests for C++ implementation of nodetool
If you can use an existing folder, consider adding your test to it. New folders should be used for new large categories/subsystems, or when the test environment is significantly different from some existing suite, e.g. you plan to start scylladb with different configuration, and you intend to add many tests and would like them to reuse an existing Scylla cluster (clusters can be reused for tests within the same folder).
To add a new folder, create a new directory, and then
copy & edit its suite.ini.