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Posted to hdfs-issues@hadoop.apache.org by "James Clampffer (JIRA)" <ji...@apache.org> on 2016/02/18 16:44:18 UTC

[jira] [Commented] (HDFS-9827) libhfds++: C++ exceptions should never escape the C API

    [ 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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