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https://issues.apache.org/jira/browse/SOLR-6235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14057631#comment-14057631
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Mark Miller commented on SOLR-6235:
-----------------------------------
Great work tracking this down!
Indeed, it's a current limitation that you can have all nodes in a shard
thinking they cannot be leader, even when all of them are available. This is
not required by the distributed model we have at all, it's just a consequence
of being over restrictive on the initial implementation - if all known replicas
are participating, you should be able to get a leader. So I'm not sure if this
case should be optional. But iff not all known replicas are participating and
you still want to force a leader, that should be optional - I think it should
default to false though. I think the system should default to reasonable data
safety in these cases.
How best to solve this, I'm not quite sure, but happy to look at a patch. How
do you plan on monitoring and taking action? Via the Overseer? It seems tricky
to do it from the replicas.
> SyncSliceTest fails on jenkins with no live servers available error
> -------------------------------------------------------------------
>
> Key: SOLR-6235
> URL: https://issues.apache.org/jira/browse/SOLR-6235
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud, Tests
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Fix For: 4.10
>
>
> {code}
> 1 tests failed.
> FAILED: org.apache.solr.cloud.SyncSliceTest.testDistribSearch
> Error Message:
> No live SolrServers available to handle this request
> Stack Trace:
> org.apache.solr.client.solrj.SolrServerException: No live SolrServers
> available to handle this request
> at
> __randomizedtesting.SeedInfo.seed([685C57B3F25C854B:E9BAD9AB8503E577]:0)
> at
> org.apache.solr.client.solrj.impl.LBHttpSolrServer.request(LBHttpSolrServer.java:317)
> at
> org.apache.solr.client.solrj.impl.CloudSolrServer.request(CloudSolrServer.java:659)
> at
> org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91)
> at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301)
> at
> org.apache.solr.cloud.AbstractFullDistribZkTestBase.checkShardConsistency(AbstractFullDistribZkTestBase.java:1149)
> at
> org.apache.solr.cloud.AbstractFullDistribZkTestBase.checkShardConsistency(AbstractFullDistribZkTestBase.java:1118)
> at org.apache.solr.cloud.SyncSliceTest.doTest(SyncSliceTest.java:236)
> at
> org.apache.solr.BaseDistributedSearchTestCase.testDistribSearch(BaseDistributedSearchTestCase.java:865)
> {code}
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