[jira] [Closed] (ARTEMIS-3025) JsonReader char[] leak

["Clebert Suconic (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARTEMIS-3025?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Clebert Suconic closed ARTEMIS-3025.
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> JsonReader char[] leak
> ----------------------
>
>                 Key: ARTEMIS-3025
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-3025
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>            Reporter: Francesco Nigro
>            Assignee: Francesco Nigro
>            Priority: Major
>             Fix For: 2.17.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> The default Json provider ie https://github.com/apache/johnzon is using several pools while parsing eg {{org.apache.johnzon.max-string-length}} that wouldn't pool char[] if the JsonReader isn't properly closed.
> Currently we're not properly closing such readers and that means that we allocate {{org.apache.johnzon.max-string-length}} * 2 bytes on each handled notification ~ 20 MiB.
> Until https://bugs.openjdk.java.net/browse/JDK-8027959 ie JDK u40, with G1GC the mentioned char[] was (very likely) allocated into the old generation as Humongous Allocation, needing a Full GC to release it.



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