huweihua created FLINK-26932:
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Summary: TaskManager hung in cleanupAllocationBaseDirs not exit.
Key: FLINK-26932
URL: https://issues.apache.org/jira/browse/FLINK-26932
Project: Flink
Issue Type: Bug
Components: Runtime / Coordination
Reporter: huweihua
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
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