[Bug]: I can cancel code running without internet connection

[Malarg]

What happened?

Steps to reproduce:

1. Change default example code (changing comment is enough)
2. Run it
3. Turn off internet connection
4. Cancel example

Expected result: Error canceling running code, because internet connection unavailable
Actual result: Running code cancelled

Issue Priority

Priority: 3 (minor)

Issue Components

• Component: Python SDK
• Component: Java SDK
• Component: Go SDK
• Component: Typescript SDK
• Component: IO connector
• Component: Beam examples
• Component: Beam playground
• Component: Beam katas
• Component: Website
• Component: Spark Runner
• Component: Flink Runner
• Component: Samza Runner
• Component: Twister2 Runner
• Component: Hazelcast Jet Runner
• Component: Google Cloud Dataflow Runner

[Malarg]

.take-issue