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https://issues.apache.org/jira/browse/HDDS-2175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16942183#comment-16942183
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Arpit Agarwal commented on HDDS-2175:
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Thank you for the link to the paper. It looks like a great weekend read.
This quote from chapter 1 stands out:
bq. While it is widely accepted that exception handling has a number of
problems, it is the best we currently have available[38, 72].
> Propagate System Exceptions from the OzoneManager
> -------------------------------------------------
>
> Key: HDDS-2175
> URL: https://issues.apache.org/jira/browse/HDDS-2175
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone Manager
> Reporter: Supratim Deka
> Assignee: Supratim Deka
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Exceptions encountered while processing requests on the OM are categorized as
> business exceptions and system exceptions. All of the business exceptions are
> captured as OMException and have an associated status code which is returned
> to the client. The handling of these is not going to be changed.
> Currently system exceptions are returned as INTERNAL ERROR to the client with
> a 1 line message string from the exception. The scope of this jira is to
> capture system exceptions and propagate the related information(including the
> complete stack trace) back to the client.
> There are 3 sub-tasks required to achieve this
> 1. Separate capture and handling for OMException and the other
> exceptions(IOException). For system exceptions, use Hadoop IPC
> ServiceException mechanism to send the stack trace to the client.
> 2. track and propagate exceptions inside Ratis OzoneManagerStateMachine and
> propagate up to the OzoneManager layer (on the leader). Currently, these
> exceptions are not being tracked.
> 3. Handle and propagate exceptions from Ratis.
> Will raise jira for each sub-task.
>
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