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https://issues.apache.org/jira/browse/SOLR-6801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14284525#comment-14284525
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Hoss Man commented on SOLR-6801:
--------------------------------
I don't fully understand this functionality, but this commit looks scary as
shit...
bq. SOLR-6801 test always writes to leader so that replication lag does not
impact next insertion
...why this change is considered a "safe" solution to the existing test
failures? .. it seems to just be making the test absurdly week -- isn't the
root problem here (replication lag) something that can and will come up when
end users try to use this same functionality?
if the only way the test can reliably pass is if we put hacks into the test to
ensure that the updates only go to the "blob" leader, that suggests to me that
the functionality itself isn't going to work reliably for end users unless they
also only ever hit the leader ... what stops a user from encountering the same
replication lag?
it seems like either:
1) we need to protect user by locking the feature down:
* document that the blob store it *only* works when talking to the "blob" leader
* lock down the blob handler to reject requests to nodes that aren't the leader
...OR...
2) the solr code itself needs hardened to do some sort of forward to leader
(ala: atomic updates and/or real time get) or push the responsibilty down to
the client via something like opportunistic locking (i'm hand wavy here because
i don't fully understand the usecases/goals)
> Load RequestHandler from blob store
> -----------------------------------
>
> Key: SOLR-6801
> URL: https://issues.apache.org/jira/browse/SOLR-6801
> Project: Solr
> Issue Type: Sub-task
> Reporter: Noble Paul
> Assignee: Noble Paul
> Priority: Blocker
> Fix For: 5.0, Trunk
>
> Attachments: SOLR-6801.patch, SOLR-6801.patch
>
>
> The solrconfig APIs ( SOLR-6607) now allow registering components through
> API. SOLR-6787 will support for blob storage.
> Jars should be able to be loaded from blobs
> example
> {code}
> curl http://localhost:8983/solr/gettingstarted/config -H "Content-Type:
> application/json" -d '{
> "create-requesthandler" : {"name" : "/mypath" ,
>
> "class":"org.apache.solr.handler.DumpRequestHandler",
> "lib" : "mycomponent",
> "version":2}
> }'
> {code}
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