Troubleshooting#

This page provides guidance for addressing common issues that may arise when working with Vineyard.

Vineyard Fails to Start#

  1. Improper Etcd Configuration

    If you encounter the following error when sending requests to Vineyard:

    Etcd error: etcdserver: too many operations in txn request, error code: 3

    This indicates that your Etcd configuration is not set up correctly and does not support more than 128 operations within a single transaction. To resolve this issue, check your Etcd startup parameters and increase the --max-txn-ops value, for example, to 102400.

  2. bind: Permission Denied Error When Launching vineyardd

    The Vineyard server uses a UNIX-domain socket for IPC connections and memory sharing with clients. By default, the UNIX-domain socket is located at /var/run/vineyard.sock, which typically requires root permission.

    To launch vineyardd, you can either:

    • Run the vineyardd command with sudo,

    • Or, specify a different location for the UNIX-domain socket that does not require root permission using the --socket command line argument, e.g., .. code:: bash

      python3 -m vineyard –socket=/tmp/vineyard.sock

Vineyard Issues on Kubernetes#

  1. Etcd Pod Resource Limitations in Kubernetes Deployment

    We have observed that etcd performance may degrade when a Vineyard client persists a large object, particularly in Kubernetes deployments where the CPU cores of the etcd pod are limited by cgroups. In such cases, users should increase the CPU resources allocated to the etcd pod. For more information on etcd tuning, please refer to the Hardware recommendations section in the etcd documentation.

Python SDK Error Scenarios#

  1. Unexpected Behavior with PyArrow

    Vineyard’s Python SDK relies on libarrow-dev. When this module is imported alongside PyArrow, numerous DLL conflict issues may arise, as detailed in https://issues.apache.org/jira/browse/ARROW-10599.

    To maintain consistency between Apache Arrow and Vineyard installations:

    • For users, simply install PyArrow and Vineyard using the pip package manager should suffice. You can install them with the following command:

      pip3 install pyarrow vineyard

    • For Vineyard developers, the locally installed PyArrow should be built from scratch, using the system-wide libarrow-dev. This can be achieved by:

      pip3 install --no-binary pyarrow pyarrow

    Additionally, you may encounter unexpected crashes or runtime exceptions if you import PyArrow before Vineyard. To avoid this, adjust the import order by import`ing Vineyard before PyArrow. If you encounter any shared library-related issues, please set the environment variable :code:`VINEYARD_DEVELOP=TRUE.