Uploaded image for project: 'Kafka'
  1. Kafka
  2. KAFKA-6277

Make loadClass thread-safe for class loaders of Connect plugins

    XMLWordPrintableJSON

Details

    • Bug
    • Status: Resolved
    • Blocker
    • Resolution: Fixed
    • 0.11.0.2, 1.0.0
    • 0.11.0.3, 1.0.1, 1.1.0
    • KafkaConnect
    • None

    Description

      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

      Attachments

        Issue Links

          Activity

            People

              kkonstantine Konstantine Karantasis
              kkonstantine Konstantine Karantasis
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: