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Posted to dev@qpid.apache.org by "jiraposter@reviews.apache.org (Commented) (JIRA)" <ji...@apache.org> on 2012/04/05 16:46:31 UTC
[jira] [Commented] (QPID-3767) Federation link index becomes
invalid on failover against a cluster.
[ https://issues.apache.org/jira/browse/QPID-3767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13247263#comment-13247263 ]
jiraposter@reviews.apache.org commented on QPID-3767:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/4659/
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Review request for qpid, Alan Conway, Gordon Sim, Ted Ross, and Rob Godfrey.
Summary
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This set of changes modifies the Broker's Link and Bridge objects by changing the way they are indexed. This change is visible to users as it modifies the existing management model for this objects.
The current implementation uses the remote broker's Host and Port value to identify the Link, and also as part of the index for identifiying the Bridge.
The problem with this approach is that it does not support failover well, where the remote Host and Port values are likely to change.
This patch modifies the Link and Bridge object to now be indexed by a unique name (expressed as a string). It removes the host & port indexing from the QMF model. With this patch, host and port are allowed to change over time without invalidating the Link or Bridge.
I've also added a reference to the connection that the Link is using - this useful information was missing from the existing model.
This patch also introduces the ability to create Links and Bridges via the QMF Broker object's "create" and "delete" method. This feature is yet to be used by qpid-route, however, and the old methods to create Links and Bridges using host and ports are preserved for backward compatibility. We can remove this if desired in a later release.
Things this patch does not do, and I'll like to track as separate feature requests if possible:
o) Modify the qpid-route tool to allow the ability to name links and bridges if desired - and allowe more control over the management of Links & Bridges - details TBD.
o) Java broker support of Link and Bridge naming, and the ability to manage Links/Bridges via the broker's create/delete methods.
Alan - my changes to the HA code are at best a guess, can you take a look?
Rob - ditto my changes to the Java broker.
thanks
This addresses bug qpid-3767.
https://issues.apache.org/jira/browse/qpid-3767
Diffs
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/trunk/qpid/cpp/src/qpid/broker/LinkRegistry.cpp 1306454
/trunk/qpid/cpp/src/qpid/broker/LinkRegistry.h 1306454
/trunk/qpid/cpp/src/qpid/broker/Link.cpp 1306454
/trunk/qpid/cpp/src/qpid/broker/Link.h 1306454
/trunk/qpid/cpp/src/qpid/broker/Broker.cpp 1306454
/trunk/qpid/cpp/src/qpid/broker/Bridge.h 1306454
/trunk/qpid/cpp/src/qpid/broker/Bridge.cpp 1306454
/trunk/qpid/cpp/src/qpid/broker/NameGenerator.h 1306454
/trunk/qpid/cpp/src/qpid/broker/RecoveryManagerImpl.cpp 1306454
/trunk/qpid/cpp/src/qpid/cluster/Connection.cpp 1306454
/trunk/qpid/cpp/src/qpid/ha/Backup.cpp 1306454
/trunk/qpid/cpp/src/qpid/ha/BrokerReplicator.cpp 1306454
/trunk/qpid/cpp/src/qpid/ha/HaBroker.cpp 1306454
/trunk/qpid/cpp/src/qpid/ha/QueueReplicator.h 1306454
/trunk/qpid/cpp/src/qpid/ha/QueueReplicator.cpp 1306454
/trunk/qpid/cpp/src/tests/federation.py 1306454
/trunk/qpid/java/broker/src/main/java/org/apache/qpid/qmf/QMFService.java 1306454
/trunk/qpid/java/broker/src/main/java/org/apache/qpid/server/configuration/LinkConfigType.java 1306454
/trunk/qpid/specs/management-schema.xml 1306454
/trunk/qpid/tools/src/py/qpid-tool 1306454
Diff: https://reviews.apache.org/r/4659/diff
Testing
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make check,
ant build/test
windows build via Hudson
Thanks,
Kenneth
> Federation link index becomes invalid on failover against a cluster.
> --------------------------------------------------------------------
>
> Key: QPID-3767
> URL: https://issues.apache.org/jira/browse/QPID-3767
> Project: Qpid
> Issue Type: Bug
> Components: C++ Broker
> Affects Versions: 0.14
> Reporter: Ken Giusti
> Assignee: Ken Giusti
> Fix For: 0.15
>
>
> The Link management object that represents a connection between two federated brokers is indexed (identified) by the remote broker's host and port. If the remote broker is part of a cluster, and a failover event occurs, the host:port used by the Link object's index may no longer exist. This prevents the route from being deleted.
> For example, create a cluster of two brokers using addresses 127.0.0.1:2222 and 127.0.0.1:3333. Start a third broker, say 127.0.0.1:8888. Create a queue route from 127.0.0.1:2222 to an exchange on 127.0.0.1:8888. Kill the broker 127.0.0.1:2222. This results in a Link object that is connected to 127.0.0.1:3333, but reports 127.0.0.1:2222 as it's host.
> [kgiusti@localhost src]$ qpid-config -a 127.0.0.1:2222 add queue src
> [kgiusti@localhost src]$ qpid-config -a 127.0.0.1:8888 add exchange fanout destx
> [kgiusti@localhost src]$ qpid-config -a 127.0.0.1:8888 add queue dest
> [kgiusti@localhost src]$ qpid-config -a 127.0.0.1:8888 bind destx dest
> [kgiusti@localhost src]$ qpid-route queue add 127.0.0.1:8888 127.0.0.1:2222 destx src
> [kgiusti@localhost src]$ ../examples/messaging/spout -b 127.0.0.1:2222 --content "ZZZ" src
> [kgiusti@localhost src]$ ../examples/messaging/drain -b 127.0.0.1:8888 -t 2 dest
> Message(properties={spout-id:8c308c74-6b25-4408-8694-93ef8352a308:0, x-amqp-0-10.routing-key:src}, content='ZZZ')
> <Kill Broker 127.0.0.1:2222, link fails over to 127.0.0.1:3333>
> From qpid-tool:
> qpid: show 133
> Object of type: org.apache.qpid.broker:link:_data(bc33c1b3-25cd-e0ce-04d7-ad684ed36d91)
> Attribute 133
> =================================================
> vhostRef 150
> host 127.0.0.1
> port 2222
> transport tcp
> durable False
> state Operational
> lastError Failed over to tcp:10.16.185.15:3333
> Once this occurs, I am unable to delete the link:
> [kgiusti@localhost src]$ qpid-route queue del 127.0.0.1:8888 127.0.0.1:2222 destx src
> [kgiusti@localhost src]$ qpid-tool 127.0.0.1:8888
> qpid: list
> Summary of Objects by Type:
> Package Class Active Deleted
> =======================================================
> org.apache.qpid.broker binding 14 0
> org.apache.qpid.broker system 1 0
> org.apache.qpid.broker broker 1 0
> org.apache.qpid.broker bridge 1 0
> org.apache.qpid.broker link 1 0
> org.apache.qpid.broker subscription 5 0
> org.apache.qpid.broker connection 2 0
> org.apache.qpid.broker session 2 0
> org.apache.qpid.broker queue 6 0
> org.apache.qpid.broker exchange 9 0
> org.apache.qpid.broker vhost 1 0
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