[FLINK-26932] TaskManager hung in cleanupAllocationBaseDirs not exit.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.11.0
• Component/s: Runtime / Coordination
• Assignee: Unassigned
• Reporter: !huwh
• Created: 30/Mar/22 14:51
• Updated: 11/Aug/22 07:33

Description

The disk TaskManager used had some fatal error. And then TaskManager hung in cleanupAllocationBaseDirs and took the main thread.
 
So this TaskManager would not respond to the cancelTask/disconnectResourceManager request.
 
At the same time, JobMaster already take this TaskManager is lost, and schedule task to other TaskManager.
 
This may cause some unexpected task running.
 
After checking the log of TaskManager, TM already lost the connection with ResourceManager, and it is always trying to register with ResourceManager. The RegistrationTimeout cannot take effect because the main thread of TaskManager is hung-up.
 
I think there are two options to handle it.

Option 1: Add timeout for TaskExecutorLocalStateStoreManager.cleanupAllocationBaseDirs, But I am afraid some other methods would block main thread too.
Option 2: Move the registrationTimeout in another thread, we need to deal will the concurrency problem