> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Cancellation `function` **Cancellation.force** 
        
          def Cancellation.force() -> bool
Forcefully cancel the invocation. Sends the 2nd and 3rd SIGINT to the Bazel client, following Bazel's 3-stage cancellation protocol (the 1st SIGINT was already sent by `cancel_invocation()`). The 3rd SIGINT triggers Bazel's built-in `KillServerProcess` which kills the server and exits the client. If the client doesn't exit within 5 seconds, falls back to SIGKILL on both the client and server. If no client is found holding the lock (e.g. the client crashed), sends SIGKILL directly to the server daemon. Returns `True` if a signal was sent, `False` if neither the client nor server could be found (the build may have already finished). `function` **Cancellation.wait** 
        
          def Cancellation.wait(
          \*,
          poll\_ms: int = 200,
          timeout\_ms: int = 0
          ) -> bool
Block until the cancelled invocation finishes. Polls until the server is no longer busy. If the `force_kill_after_ms` deadline (set on `cancel_invocation`) is reached while still busy, automatically escalates by calling `force()`. Returns `True` if the server became free (either gracefully or after force-kill). Returns `False` only if `timeout_ms` is set and reached before the server became free (in this case no automatic escalation occurs — use `force()` manually). `property` **Cancellation.busy** 
        
          Cancellation.busy: bool
Whether the bazel server is currently busy (lock held by another client). Queries in real time via `bazel --noblock_for_lock info`.