[jboss-jira] [JBoss JIRA] Moved: (JBCLUSTER-280) Access to HAPartiiton membership is not thread-safe
[
https://jira.jboss.org/browse/JBCLUSTER-280?page=com.atlassian.jira.plugi...
]
Brian Stansberry moved JBAS-5631 to JBCLUSTER-280:
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Project: JBoss Clustering (was: JBoss Application Server)
Key: JBCLUSTER-280 (was: JBAS-5631)
Affects Version/s: (was: JBossAS-4.2.2.GA)
(was: JBossAS-5.0.0.Beta4)
(was: JBossAS-4.2.1.GA)
(was: JBossAS-5.0.0.Beta3)
(was: JBossAS-4.2.0.GA)
(was: JBossAS-5.0.0.Beta2)
(was: JBossAS-4.2.0.CR2)
(was: JBossAS-4.2.0.CR1)
(was: JBossAS-5.0.0.Beta1)
(was: JBossAS-4.0.5.GA)
(was: JBossAS-4.0.4.GA)
(was: JBossAS-4.0.5.CR1)
(was: JBossAS-4.0.4.CR2)
(was: JBossAS-3.2.8.SP1)
(was: JBossAS-3.2.8 Final)
(was: JBossAS-4.0.4RC1)
(was: JBossAS-4.0.3 Final)
(was: JBossAS-3.2.8RC1)
(was: JBossAS-4.0.3 SP1)
(was: JBossAS-4.0.3RC1)
(was: JBossAS-4.0.3RC2)
(was: JBossAS-4.0.2 Final)
(was: JBossAS-4.0.2RC1)
(was: JBossAS-4.0.1 SP1)
(was: JBossAS-4.0.1 Final)
(was: JBossAS-4.0.1RC1)
(was: JBossAS-4.0.0 Final)
Component/s: HA-Server-Core
(was: Clustering)
Fix Version/s: HA-Server-Core 1.0.0.Beta1
(was: 6.0.0.M4)
Access to HAPartiiton membership is not thread-safe
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Key: JBCLUSTER-280
URL: https://jira.jboss.org/browse/JBCLUSTER-280
Project: JBoss Clustering
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: HA-Server-Core
Reporter: Paul Ferraro
Assignee: Brian Stansberry
Fix For: HA-Server-Core 1.0.0.Beta1
There are 2 problems with the current implementation.
1. Currently, the membership collections, while synchronized, are both non-volatile and
updated in a non-final fashion, so concurrent access by both view changes and rpc
invocations is not thread-safe.
2. Membership is expressed in 4 different vectors. During view change, these vectors are
not updated atomically.
To address both problems, the 4 vectors ought to be encapsulated into a single volatile,
immutable object.
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