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https://issues.apache.org/jira/browse/SOLR-12708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16766768#comment-16766768
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Tomás Fernández Löbbe commented on SOLR-12708:
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I just found this JIRA, looks like I duplicated it with SOLR-13231. Thanks for
the PR [~manokovacs], looks like a similar approach than the one I took in
SOLR-13231 (I was thinking about doing the same thing as you did for back
compat, if we can't make it to 8.0). I'll merge the changes in your PR with
mine.
> Async collection actions should not hide failures
> -------------------------------------------------
>
> Key: SOLR-12708
> URL: https://issues.apache.org/jira/browse/SOLR-12708
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Admin UI, Backup/Restore
> Affects Versions: 7.4
> Reporter: Mano Kovacs
> Assignee: Varun Thacker
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Async collection API may hide failures compared to sync version.
> [OverseerCollectionMessageHandler::processResponses|https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/cloud/api/collections/OverseerCollectionMessageHandler.java#L744]
> structures errors differently in the response, that hides failures from most
> evaluators. RestoreCmd did not receive, nor handle async addReplica issues.
> Sample create collection sync and async result with invalid solrconfig.xml:
> {noformat}
> {
> "responseHeader":{
> "status":0,
> "QTime":32104},
> "failure":{
> "localhost:8983_solr":"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException:Error
> from server at http://localhost:8983/solr: Error CREATEing SolrCore
> 'name4_shard1_replica_n1': Unable to create core [name4_shard1_replica_n1]
> Caused by: The content of elements must consist of well-formed character data
> or markup.",
> "localhost:8983_solr":"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException:Error
> from server at http://localhost:8983/solr: Error CREATEing SolrCore
> 'name4_shard2_replica_n2': Unable to create core [name4_shard2_replica_n2]
> Caused by: The content of elements must consist of well-formed character data
> or markup.",
> "localhost:8983_solr":"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException:Error
> from server at http://localhost:8983/solr: Error CREATEing SolrCore
> 'name4_shard1_replica_n2': Unable to create core [name4_shard1_replica_n2]
> Caused by: The content of elements must consist of well-formed character data
> or markup.",
> "localhost:8983_solr":"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException:Error
> from server at http://localhost:8983/solr: Error CREATEing SolrCore
> 'name4_shard2_replica_n1': Unable to create core [name4_shard2_replica_n1]
> Caused by: The content of elements must consist of well-formed character data
> or markup."}
> }
> {noformat}
> vs async:
> {noformat}
> {
> "responseHeader":{
> "status":0,
> "QTime":3},
> "success":{
> "localhost:8983_solr":{
> "responseHeader":{
> "status":0,
> "QTime":12}},
> "localhost:8983_solr":{
> "responseHeader":{
> "status":0,
> "QTime":3}},
> "localhost:8983_solr":{
> "responseHeader":{
> "status":0,
> "QTime":11}},
> "localhost:8983_solr":{
> "responseHeader":{
> "status":0,
> "QTime":12}}},
> "myTaskId2709146382836":{
> "responseHeader":{
> "status":0,
> "QTime":1},
> "STATUS":"failed",
> "Response":"Error CREATEing SolrCore 'name_shard2_replica_n2': Unable to
> create core [name_shard2_replica_n2] Caused by: The content of elements must
> consist of well-formed character data or markup."},
> "status":{
> "state":"completed",
> "msg":"found [myTaskId] in completed tasks"}}
> {noformat}
> Proposing adding failure node to the results, keeping backward compatible but
> correct result.
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