# AdminDrainRequest Prefer `builder()` to the canonical record constructor. Builder-based call sites remain source-compatible when optional fields are added in later SDK versions. - `timeoutSec` (`Integer`): Maximum seconds to wait for the server to quiesce before returning. - `reason` (`String`): Human-readable reason for initiating drain mode. - `waitForQuiesce` (`Boolean`): If true, wait for in-flight requests to complete and the server to reach QUIESCED before responding. [Java](../../java.md)