Hoss Man created SOLR-11484:
-------------------------------
Summary: Possible bug with CloudSolrClient directedUpdates &
cached collection state --
TestCollectionsAPIViaSolrCloudCluster.testCollectionCreateSearchDelete
Key: SOLR-11484
URL: https://issues.apache.org/jira/browse/SOLR-11484
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Hoss Man
{{TestCollectionsAPIViaSolrCloudCluster.testCollectionCreateSearchDelete}}
seems to fail with non-trivial frequency, so I grabbed the logs from a recent
failure and starting trying to follow along with the actions to figure out what
exactly is happening....
https://jenkins.thetaphi.de/job/Lucene-Solr-master-Linux/20662/
{noformat}
[junit4] ERROR 20.3s J1 |
TestCollectionsAPIViaSolrCloudCluster.testCollectionCreateSearchDelete <<<
[junit4] > Throwable #1:
org.apache.solr.client.solrj.impl.CloudSolrClient$RouteException: Error from
server at https://127.0.0.1:42959/solr/testcollection_shard1_replica_n3:
Expected mime type a
pplication/octet-stream but got text/html. <html>
[junit4] > <head>
[junit4] > <meta http-equiv="Content-Type"
content="text/html;charset=ISO-8859-1"/>
[junit4] > <title>Error 404 </title>
{noformat}
The crux of this failure appears to be a genuine bug in how CloudSolrClient
uses it's cached ClusterState info when doing (direct) updates. The key bits
seem to be:
* CloudSolrClient does _something_ (update,query,etc...) with a collection
causing the current cluster state for the collection to be cached
* The actual collection changes such that a Solr node/core no longer exists as
part of the collection
* CloudSolrClient is asked to process an UpdateRequest which triggers the code
paths for the {{directUpdate()}} method -- which attempts to route the updates
directly to a replica of the appropriate shard using the (cache) collection
state info
* CloudSolrClient (may) attempt to send that UpdateRequest to a node/core that
doesn't exist, getting a 404 -- which does not (seem to) trigger a state
refresh, or retry to find a correct URL to resend the update to.
Details to follow in comment....
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