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https://issues.apache.org/jira/browse/SOLR-4754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13643113#comment-13643113
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Mark Miller commented on SOLR-4754:
-----------------------------------
We need to fix it, and it's def a 4.3 blocker.
> solrcloud does not detect an implicit "host" and does not provide clear error
> using 4x example
> ----------------------------------------------------------------------------------------------
>
> Key: SOLR-4754
> URL: https://issues.apache.org/jira/browse/SOLR-4754
> Project: Solr
> Issue Type: Bug
> Reporter: Hoss Man
> Priority: Blocker
> Fix For: 4.3, 5.0
>
>
> Testing out the 4.3.0 RC3, I tried to run through the SolrCloud examples.
> Following the steps for "Example A: Simple two shard cluster" my two nodes
> started up w/o any obvious problem, however the I noticed the cluster graph
> was empty, and attempts to index documents failed with invalid url errors
> when trying to forward the distributed updates. Closer inspection of the
> cluster state lead me to discover that the URLs for the nodes as registered
> with ZK did not include any host information at all. (details to follow in
> comment)
> Apparently, the logic for implicitly detecting a hostname to use with
> SolrCloud failed to work, and did not cause any sort of startup error.
> Important things to note:
> # java clearly _did_ know what the current configured hostname was for my
> machine, because it appeared correctly in the {{<title/>}} tag of the admin
> UI (pulled from "/admin/system") so i don't think this probablem is specific
> to any sort of glitch in my hostname configuration.
> # explicitly setting the "host" sys prop (as used in the example solr.xml)
> worked around the problem
> # I could _not_ reproduce this problem with Solr 4.2.1 (using the 4.2.1
> example configs)
> We should try to make the hostname/url detection logic smarter (i'm not sure
> why it isn't working as well as the SystemInfoHandler) and it should fail
> loudly on startup as last resort rather then registering the node with ZK
> using an invalid URL.
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