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Posted to dev@lucene.apache.org by "Elaine Cario (JIRA)" <ji...@apache.org> on 2016/11/09 16:29:58 UTC
[jira] [Commented] (SOLR-7951) LBHttpSolrClient wraps ALL
exceptions in "No live SolrServers available to handle this request"
exception, even usage errors
[ https://issues.apache.org/jira/browse/SOLR-7951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15651360#comment-15651360 ]
Elaine Cario commented on SOLR-7951:
------------------------------------
We've upgraded now to Solr 5.5.2 (unpatched) and users are now reporting this issue again in the same scenario - use of wildcard in the query reports too many expansions, every shard reports the same exception, and instead of the actual exception, we get the "No live servers...." exception.
I suppose we can run again with a locally patched Solr, but it would be really nice to have this fixed in Solr 6.x.
Thanks.
> LBHttpSolrClient wraps ALL exceptions in "No live SolrServers available to handle this request" exception, even usage errors
> ----------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-7951
> URL: https://issues.apache.org/jira/browse/SOLR-7951
> Project: Solr
> Issue Type: Bug
> Components: SolrJ
> Affects Versions: 5.2.1
> Reporter: Elaine Cario
> Assignee: Mark Miller
> Priority: Minor
> Attachments: SOLR-7951-4.x.patch, SOLR-7951-4.x.patch, SOLR-7951.patch
>
>
> We were experiencing many "No live SolrServers available to handle this request" exception, even though we saw no outages with any of our servers.
> It turned out the actual exceptions were related to the use of wildcards in span queries (and in some cases other invalid queries or usage-type issues). Traced it back to LBHttpSolrClient which was wrapping all exceptions, even plain SolrExceptions, in that outer exception.
> Instead, wrapping in the out exception should be reserved for true communication issues in SolrCloud, and usage exceptions should be thrown as is.
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