mirror of https://github.com/apache/druid.git
db91961af7
* kubernetes: restart watch on null response Kubernetes watches allow a client to efficiently processes changes to resources. However, they have some idiosyncrasies. In particular, they can error out for various reasons leading to what would normally be seen as an invalid result. The Druid kubernetes node discovery subsystem does not handle a certain case properly. The watch can return an item with a null object. These leads to a null pointer exception. When this happens, the provider needs to restart the watch, because rerunning the watch from the same resource version leads to the same result: yet another null pointer exception. This commit changes the provider to handle null objects by restarting the watch. * review: add more coverage This adds a bit more coverage to the K8sDruidNodeDiscoveryProvider watch loop, and removes an unnecessay return. * kubernetes: reduce logging verbosity The log messages about items being NULL don't really deserve to be at a level other than DEBUG since they are not actionable, particularly since we automatically recover now. Move them to the DEBUG level. |
||
|---|---|---|
| .. | ||
| src | ||
| pom.xml | ||