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From "James Clampffer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9827) libhfds++: C++ exceptions should never escape the C API
Date Thu, 18 Feb 2016 15:44:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15152468#comment-15152468

James Clampffer commented on HDFS-9827:

Superset of the work HDFS-9699.  Depending on how granular we want the patch to be I can close
that one.

> libhfds++: C++ exceptions should never escape the C API
> -------------------------------------------------------
>                 Key: HDFS-9827
>                 URL: https://issues.apache.org/jira/browse/HDFS-9827
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Bob Hansen
> Some low-level subsystems (asio, rapidxml) throw exceptions on error.  While our internal
code doesn't utilize exceptions, these are part of the libraries we are using.
> Calls to asio should be wrapped in try blocks.  
> For additional safety, all of the C api implementations should have try...catch(...)
blocks to catch any C++ exceptions and make sure they don't bring down the calling stack,
which might have no concept of exceptions.

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