[jira] [Assigned] (SOLR-7803) Classloading deadlock in TrieField

["Uwe Schindler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-7803?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Uwe Schindler reassigned SOLR-7803:
-----------------------------------

    Assignee: Uwe Schindler

> Classloading deadlock in TrieField
> ----------------------------------
>
>                 Key: SOLR-7803
>                 URL: https://issues.apache.org/jira/browse/SOLR-7803
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 5.2.1
>         Environment: OSX, JDK8u45
>            Reporter: Markus Heiden
>            Assignee: Uwe Schindler
>              Labels: patch
>             Fix For: 5.3, Trunk
>
>         Attachments: SOLR-7803.patch, TrieField.patch
>
>
> When starting a test Sol instance, it locks up sometimes. We took a thread dump and all threads are trying to load classes via Class.forName() and are stuck in that method. One of these threads got one step further into the <clinit> of TrieField where it creates an internal static instance of TrieDateField (circular dependency). I don't know why this locks up exactly, but this code smells anyway. So I removed that instance and made the used methods static in TrieDateField.
> This does not completely remove the circular dependency, but at least it is no more in <clinit>. For the future someone may extract a util class to remove the circular dependency.



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