kafka-jira mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-6277) Make loadClass thread-safe for class loaders of Connect plugins
Date Wed, 17 Jan 2018 04:07:03 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16328248#comment-16328248
] 

ASF GitHub Bot commented on KAFKA-6277:
---------------------------------------

kkonstantine opened a new pull request #4428: KAFKA-6277: Ensure loadClass for plugin class
loaders is thread-safe.
URL: https://github.com/apache/kafka/pull/4428
 
 
   `loadClass` needs to be synchronized to protect subsequent calls to `defineClass`. 
   
   Details in the javadoc of this PR as well as here too: https://docs.oracle.com/javase/7/docs/technotes/guides/lang/cl-mt.html
   
   /cc @ewencp @rhauch 
   
   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
   - [ ] Verify test coverage and CI build status
   - [ ] Verify documentation (including upgrade notes)
   

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


> Make loadClass thread-safe for class loaders of Connect plugins
> ---------------------------------------------------------------
>
>                 Key: KAFKA-6277
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6277
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>    Affects Versions: 1.0.0, 0.11.0.2
>            Reporter: Konstantine Karantasis
>            Assignee: Konstantine Karantasis
>            Priority: Major
>             Fix For: 1.0.1, 0.11.0.3
>
>
> In Connect's classloading isolation framework, {{PluginClassLoader}} class encounters
a race condition when several threads corresponding to tasks using a specific plugin (e.g.
a Connector) try to load the same class at the same time on a single JVM. 
> The race condition is related to calls to method {{defineClass}} which, contract to {{findClass}},
is not thread safe for classloaders that override {{loadClass}}. More details here: 
> https://docs.oracle.com/javase/7/docs/technotes/guides/lang/cl-mt.html



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message