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Posted to dev@qpid.apache.org by "Keith Wall (JIRA)" <ji...@apache.org> on 2016/07/06 21:59:11 UTC
[jira] [Commented] (QPID-7012) Connections producing lots of
non-transactional persistent messages can cause other transactions to be
delayed/time out
[ https://issues.apache.org/jira/browse/QPID-7012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15365186#comment-15365186 ]
Keith Wall commented on QPID-7012:
----------------------------------
I think there is no change required here for 6.1, at least for 0-8..0-10. Any in-flight asynchronous transactions are completed by {{ProtocolEngine#received}} before control returns to the IO layer. This will constrain the amount of work to a maximum of a network buffer size (256 * 1024 bytes by default).
> Connections producing lots of non-transactional persistent messages can cause other transactions to be delayed/time out
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-7012
> URL: https://issues.apache.org/jira/browse/QPID-7012
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Reporter: Keith Wall
> Fix For: qpid-java-6.1
>
>
> Work mixes that include
> * connection producing large numbers of persistent messages *without* transactions
> * transactional work
> may see timeouts in some situations.
> In the HA case, the non-transaction messages are sent to the replicas lazily, so all replicas may get behind. This means the a transaction will need to wait for the replicas catch up before its transaction completes.
> In the non-HA (and HA on the master), the commit related to the transactional work may queue behind the commit jobs related to the non-transactional work.
> This problem affects only publishes using unconfirmed publishes, currently the defect for AMQP 0-8..0-91 on in the Java Client.
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