[jira] [Updated] (SOLR-7352) Synchronize CloudSolrStream EOF Tuple Map

["Joel Bernstein (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-7352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joel Bernstein updated SOLR-7352:
---------------------------------
    Summary: Synchronize CloudSolrStream EOF Tuple Map  (was: Synchronize CloudSolrStream's EOF Tuple Map)

> Synchronize CloudSolrStream EOF Tuple Map
> -----------------------------------------
>
>                 Key: SOLR-7352
>                 URL: https://issues.apache.org/jira/browse/SOLR-7352
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Joel Bernstein
>         Attachments: SOLR-7352.patch, SOLR-7352.patch
>
>
> CloudSolrStream currently collects the EOF Tuples from the underlying SolrStreams in an un-synchronized Map. 
> This ticket synchronizes this Map because of the following race condition:
> The underlying SolrStream's are opened in parallel. If the first Tuple returned by two or more SolrStream's is an EOF Tuple, then a race condition will occur as the EOF Tuples are added to the Map.
> The race condition only occurs if EOF tuples are returned during the *opening* of the SolrStreams (zero results returned). This is because the *reading* of SolrStreams is performed in a single thread, so if the initial Tuple returned is not an EOF Tuple no race condition is possible.



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