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https://issues.apache.org/jira/browse/HDFS-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16218511#comment-16218511
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Steve Loughran commented on HDFS-7878:
--------------------------------------
filesystem.md LGTM, +1 for that bit,
Same for the API
AbstractContractOpenTest: L241, L260. if you use LambdaTestUtils.intercept() it
automatically creates the exception message including a toString() value of the
lambda exp.
I could imagine adding something similar for all the skip-if-unsupported ops,
eg.
{code}
static <T> T evalOrSkip(String op, Callable<T> eval) throws Exception {
try {
return eval.call()
} catch (UnsupportedException ex) {
skip("Unsupported feature: " + op)
}
}
{code}
Then you could go
{code}
PathHandle fd = evalOrSkip("exact",
() -> fd.getFileSystem().getPathHandle(stat, HandleOpt.exact()));
{code}
...etc
w.r.t HDFS changes, I'm not qualified to comment on the implementation. Sorry.
> API - expose an unique file identifier
> --------------------------------------
>
> Key: HDFS-7878
> URL: https://issues.apache.org/jira/browse/HDFS-7878
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Labels: BB2015-05-TBR
> Attachments: HDFS-7878.01.patch, HDFS-7878.02.patch,
> HDFS-7878.03.patch, HDFS-7878.04.patch, HDFS-7878.05.patch,
> HDFS-7878.06.patch, HDFS-7878.07.patch, HDFS-7878.08.patch,
> HDFS-7878.09.patch, HDFS-7878.10.patch, HDFS-7878.11.patch,
> HDFS-7878.12.patch, HDFS-7878.13.patch, HDFS-7878.14.patch,
> HDFS-7878.15.patch, HDFS-7878.16.patch, HDFS-7878.patch
>
>
> See HDFS-487.
> Even though that is resolved as duplicate, the ID is actually not exposed by
> the JIRA it supposedly duplicates.
> INode ID for the file should be easy to expose; alternatively ID could be
> derived from block IDs, to account for appends...
> This is useful e.g. for cache key by file, to make sure cache stays correct
> when file is overwritten.
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