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From "ASF subversion and git services (Jira)" <j...@apache.org>
Subject [jira] [Commented] (QPID-8398) [Broker-J] [AMQP 0-9] Improve heap usage utilization by small transient messages with headers
Date Wed, 08 Jan 2020 10:16:00 GMT

    [ https://issues.apache.org/jira/browse/QPID-8398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17010544#comment-17010544

ASF subversion and git services commented on QPID-8398:

Commit 664d6f21ae73bd97c42ead00b7e99d6242d4a21a in qpid-broker-j's branch refs/heads/7.1.x
from Alex Rudyy
[ https://gitbox.apache.org/repos/asf?p=qpid-broker-j.git;h=664d6f2 ]

QPID-8398: [Broker-J][AMQP 0-9] Use SoftReferences to access decoded message heades in order
to GC them before running into OutOfMemory conditions

> [Broker-J] [AMQP 0-9] Improve heap usage utilization by small transient messages with
> ---------------------------------------------------------------------------------------------
>                 Key: QPID-8398
>                 URL: https://issues.apache.org/jira/browse/QPID-8398
>             Project: Qpid
>          Issue Type: Bug
>          Components: Broker-J
>    Affects Versions: qpid-java-broker-7.1.0, qpid-java-broker-7.1.1, qpid-java-broker-7.1.2,
qpid-java-broker-7.1.3, qpid-java-broker-7.1.4, qpid-java-broker-7.1.5, qpid-java-broker-7.1.6
>            Reporter: Alex Rudyy
>            Priority: Major
>             Fix For: qpid-java-broker-8.0.0, qpid-java-broker-7.1.7
> The Qpid Broker can crash with OutOfMemoryError when small  transient messages with
decoded headers occupy the entire heap without triggering the flow to disk. The direct memory
utilization by the messages is below the flow to disk threshold. As result, the decoded message
headers  are accumulated in heap and can cause OutOfMemoryError.
> The heap utilization can be improved by using {{SoftReferences}} for decoded headers.
That should allow to GC the headers on running into heap OutOfMemory conditions

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