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From "Erick Erickson (JIRA)" <>
Subject [jira] [Updated] (SOLR-4400) Rapidly opening and closing cores can lead to deadlock
Date Sun, 03 Feb 2013 16:44:12 GMT


Erick Erickson updated SOLR-4400:

    Attachment: 4x_stack.txt

Attaching jstack output for a fresh (3-Feb) run against 4x, on a _very_ quick look it has
the same issue, so I think we can be confident that the same fix needs to go in both places.
Won't have time to look at this in detail until later today.
> Rapidly opening and closing cores can lead to deadlock
> ------------------------------------------------------
>                 Key: SOLR-4400
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.1
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>             Fix For: 4.2, 5.0
>         Attachments: 4x_stack.txt
> See the discussion at SOLR-4196. Under ridiculous loads (i.e. every request causes a
core to close and another one to open) Solr can lock up. This is _only_ a problem if you are
using transient cores (see SOLR-1028) with a limited cache size. Simply lazily loading cores
that are NOT transient shouldn't have this problem, you need to be closing cores to get here.

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