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From "Bob Hansen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9699) libhdfs++: Add appropriate catch blocks for ASIO operations that throw
Date Mon, 29 Feb 2016 19:30:18 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bob Hansen updated HDFS-9699:
-----------------------------
    Attachment: HDFS-6966.HDFS-8707.000.patch

Catches exceptions at the C API and at the top of the ASIO worker call stacks.  

For the former, reports as Exception status objects; for the latter, puts in a LOG_WARN and
swallows the exception.

> libhdfs++: Add appropriate catch blocks for ASIO operations that throw
> ----------------------------------------------------------------------
>
>                 Key: HDFS-9699
>                 URL: https://issues.apache.org/jira/browse/HDFS-9699
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: James Clampffer
>            Assignee: James Clampffer
>         Attachments: HDFS-6966.HDFS-8707.000.patch, cancel_backtrace.txt
>
>
> libhdfs++ doesn't create exceptions of its own but it should be able to gracefully handle
exceptions thrown by libraries it uses, particularly asio.
> libhdfs++ should be able to catch most exceptions within reason either at the call site
or in the code that spins up asio worker threads.  Certain system exceptions like std::bad_alloc
don't need to be caught because by that point the process is likely in a unrecoverable state.



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