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https://issues.apache.org/jira/browse/ARTEMIS-4804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Justin Bertram reassigned ARTEMIS-4804:
---------------------------------------
Assignee: Justin Bertram
> Null dereferencing in ScaleDownHandler.java
> -------------------------------------------
>
> Key: ARTEMIS-4804
> URL: https://issues.apache.org/jira/browse/ARTEMIS-4804
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Reporter: Galkin Alexey
> Assignee: Justin Bertram
> Priority: Major
>
> In [line
> 332|https://github.com/apache/activemq-artemis/blob/main/artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/ScaleDownHandler.java]
> in file {{ScaleDownHandler.java}} variable {{session}} is initialized
> {code:java}
> ClientSession session = sessionFactory.createSession(user, password, true,
> false, false, false, 0);{code}
> In [line
> 851|https://github.com/apache/activemq-artemis/blob/main/artemis-core-client/src/main/java/org/apache/activemq/artemis/core/client/impl/ClientSessionFactoryImpl.java]
> in {{{}ClientSessionFactoryImp.java{}}}, the code synchronizes with the
> sessions collection and checks whether the current session is closed or
> whether the client protocol manager is down. If the closed session or
> inactive client protocol manager condition is met, the session is closed and
> null is returned
> {code:java}
> if (closed || !clientProtocolManager.isAlive()){
> session.close();
> return null;
> }{code}
> The {{session}} variable could potentially be {{{}null{}}}.
> In [line
> 339|https://github.com/apache/activemq-artemis/blob/main/artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/ScaleDownHandler.java]
> in file {{ScaleDownHandler.java}} potential null dereference occurs.
> {code:java}
> session.start(xid, XAResource.TMNOFLAGS);
> {code}
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