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https://issues.apache.org/jira/browse/HDFS-15112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014866#comment-17014866
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Ayush Saxena commented on HDFS-15112:
-------------------------------------
Thanx [~elgoiri] for the patch. the UT in v004 seems to fail. There are two
reasons :
first, The test expects unavailable
{{RouterRpcClient.isUnavailableException(ioe)}} but the thrown is
{{NoNamenodeException}}
Changing this :
{code:java}
+ if (isUnavailableException(ioe)) {
+ // We cannot conclude if this is a proper exception
+ RemoteLocationContext loc = locations.get(i);
+ String nsId = loc.getNameserviceId();
+ throw new NoNamenodesAvailableException(nsId, ioe);
+ }
{code}
to :
{code:java}
if (isUnavailableException(ioe)) {
// We cannot conclude if this is a proper exception
throw ioe;
}
{code}
Works for me.
Secondly, Seems the jenkins didn't complained about this but the test failed at
my local due to this, I think we should have
{{refreshRoutersCaches({color:#660e7a}routers{color});}} after creating mount
entry. SInce we are using random routers first for mount entry and then for
filesystem.
Post these changes the UT seems to work fine, give a check once.
> RBF: Do not return FileNotFoundException when a subcluster is unavailable
> --------------------------------------------------------------------------
>
> Key: HDFS-15112
> URL: https://issues.apache.org/jira/browse/HDFS-15112
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Major
> Attachments: HDFS-15112.000.patch, HDFS-15112.001.patch,
> HDFS-15112.002.patch, HDFS-15112.004.patch, HDFS-15112.patch
>
>
> If we have a mount point using HASH_ALL across two subclusters and one of
> them is down, we may return FileNotFoundException while the file is just in
> the unavailable subcluster.
> We should not return FileNotFoundException but something that shows that the
> subcluster is unavailable.
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