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https://issues.apache.org/jira/browse/HDFS-9118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208411#comment-15208411
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Bob Hansen commented on HDFS-9118:
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Before we commit it, do you think we should add a __FILE__ and __LINE__ capture
to the macro? I can imagine the additional default context could be handy, and
it is very cheap at runtime.
We might also be able to use SFINAE
(https://en.wikipedia.org/wiki/Substitution_failure_is_not_an_error) to detect
if "this" is valid in the current context and capture this as a void pointer
(which has been Very Helpful in recent debugging, especially for lifetime
issues).
> Add logging system for libdhfs++
> --------------------------------
>
> Key: HDFS-9118
> URL: https://issues.apache.org/jira/browse/HDFS-9118
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Affects Versions: HDFS-8707
> Reporter: Bob Hansen
> Assignee: James Clampffer
> Attachments: HDFS-9118.HDFS-8707.000.patch,
> HDFS-9118.HDFS-8707.001.patch, HDFS-9118.HDFS-8707.002.patch,
> HDFS-9118.HDFS-8707.003.patch, HDFS-9118.HDFS-8707.003.patch
>
>
> With HDFS-9505, we've starting logging data from libhdfs++. Consumers of the
> library are going to have their own logging infrastructure that we're going
> to want to provide data to.
> libhdfs++ should have a logging library that:
> * Is overridable and can provide sufficient information to work well with
> common C++ logging frameworks
> * Has a rational default implementation
> * Is performant
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