[BEAM-8846] Force synchronization of the stream observer in BeamFnControlClient

• Type: Bug
• Status: Resolved
• Priority: P2
• Resolution: Not A Problem
• Affects Version/s: 2.18.0
• Fix Version/s: 2.19.0
• Component/s: sdk-java-harness
• Labels: Done
• Assignee: sunjincheng
• Reporter: sunjincheng
• Created: 28/Nov/19 13:47
• Updated: 06/Oct/20 21:52
• Resolved: 23/Dec/19 19:13

Description

Currently there is no synchronization to access the stream observer in BeamFnControlClient which is not thread safe. We should fix it.

Issue Links

• links to: GitHub Pull Request #10242