|author||Qian Zhang <email@example.com>||Fri May 15 10:23:51 2020 +0800|
|committer||Qian Zhang <firstname.lastname@example.org>||Fri May 29 17:19:56 2020 +0800|
Erased `Info` struct before unmouting volumes in Docker volume isolator. Currently when `DockerVolumeIsolatorProcess::cleanup()` is called, we will unmount the volume first, and if the unmount operation fails we will NOT erase the container's `Info` struct from `infos`. This is problematic because the remaining `Info` in `infos` will cause the reference count of the volume is greater than 0, but actually the volume is not being used by any containers. That means we may never get a chance to unmount this volume on this agent, furthermore if it is an EBS volume, it cannot be used by any tasks launched on any other agents since a EBS volume can only be attached to one node at a time. The only workaround would manually unmount the volume. So in this patch `DockerVolumeIsolatorProcess::cleanup()` is updated to erase container's `Info` struct before unmounting volumes. Review: https://reviews.apache.org/r/72516
Apache Mesos is a cluster manager that provides efficient resource isolation and sharing across distributed applications, or frameworks. It can run Hadoop, Jenkins, Spark, Aurora, and other frameworks on a dynamically shared pool of nodes.
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