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Known issues in Hue on public clouds

Learn about the known issues related to the Hue query editor in Cloudera Data Warehouse (CDW) service on public clouds, the impact or changes to the functionality, and the workaround.

TSB 2023-670: Hue frontend may become stuck in CrashLoopBackoff on CDW running on Azure
Hue frontend for Apache Impala (Impala) and Apache Hive (Hive) Virtual Warehouses created in Cloudera Data Warehouse (CDW) can be stuck in a CrashLoopBackoff state on Microsoft Azure (Azure) platform, making it impossible to reach the Virtual Warehouse through Hue. In this case, the following error message is displayed: kubelet Error: failed to create containerd task: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: “run_httpd.sh”: cannot run executable found relative to current directory: unknown

The root cause of the issue is a recent node image upgrade in Azure made by Microsoft, where the version of the container runtime (containerd) was upgraded to 1.6.18. This version upgraded Go SDK to 1.19.6, where the behavior of how program execution works has changed. Due to security concerns, the newer version of Go SDK does not resolve a program using an implicit or explicit path entry relative to the current directory (for more information, see the Go documentation), and containerd indirectly uses this Go exec API. The Docker command of the Hue frontend relies on the former behavior. Therefore the command fails on recent node images, because it cannot find the expected executable in the current working directory of the containers anymore. Cloudera first noticed the aforementioned containerd version in the Azure Kubernetes Service (AKS) released on 2023-03-05. Every node image which is newer than the version released on 2023-03-05 is affected by this issue. Unfortunately, Cloudera does not have any insight to when Microsoft rolls out new node images in a given region. Therefore, it is possible that in some regions, the older node images are still in use, where the issue does not arise until a given regional update is applied to the node images.

CDW environments, which are already activated and running, are not affected as long as customers do not trigger a node image upgrade to the latest available version either using Azure Command Line Interface (CLI) or on the Azure portal. If the node image is upgraded to the latest version, then the Virtual Warehouses also need to be upgraded to the latest CDWH-2023.0.14.0 version. Newly created CDW environments are not affected, but customers are advised to not choose a Hue version lower than CDWH-2023.0.14.0 during any Virtual Warehouse creation because such a configuration is affected by this issue.

Knowledge article
For the latest update on this issue see the corresponding Knowledge article: TSB 2023-670: TSB Hue frontend may become stuck in CrashLoopBackoff on CDW running on Azure
IMPALA-11447 Selecting certain complex types in Hue crashes Impala
Queries that have structs/arrays in the select list crash Impala if initiated by Hue.
Workaround: Do not select structs/arrays in Hue.
DWX-8460: Unable to delete, move, or rename directories within the S3 bucket from Hue
Problem: You may not be able to rename, move, or delete directories within your S3 bucket from the Hue web interface. This is because of an underlying issue, which will be fixed in a future release.
Workaround: You can move, rename, or delete a directory using the HDFS commands as follows:
  1. SSH into your CDP environment host.
  2. To delete a directory within your S3 bucket, run the following command:
    hdfs dfs -rm -r [***COMPLETE-PATH-TO-S3-BUCKET***]/[***DIRECTORY-NAME***]
  3. To rename a folder, create a new directory and run the following command to move files from the source directory to the target directory:
    hdfs dfs -mkdir [***DIRECTORY-NAME***]
    hdfs dfs -mv [***COMPLETE-PATH-TO-S3-BUCKET***]/[***SOURCE-DIRECTORY***] [***COMPLETE-PATH-TO-S3-BUCKET***]/[***TARGET-DIRECTORY***]
DWX-6674: Hue connection fails on cloned Impala Virtual Warehouses after upgrading
Problem: If you clone an Impala Virtual Warehouse from a recently upgraded Impala Virtual Warehouse, and then try to connect to Hue, the connection fails.
Workaround: Create a new Impala Virtual Warehouse and do not clone from a recently upgraded warehouse. Then the connection to Hue from the new Impala Virtual Warehouse succeeds.
DWX-5650: Hue only makes the first user a superuser for all Virtual Warehouses within a Data Catalog
Problem: Hue marks the user that logs in to Hue from a Virtual Warehouse for the first time as the Hue superuser. But if multiple Virtual Warehouses are connected to a single Data Catalog, then the first user that logs in to any one of the Virtual Warehouses within that Data Catalog is the Hue superuser.

For example, consider that a Data Catalog DC-1 has two Virtual Warehouses VW-1 and VW-2. If a user named John logs in to Hue from VW-1 first, then he becomes the Hue superuser for all the Virtual Warehouses within DC-1. At this time, if Amy logs in to Hue from VW-2, Hue does not make her a superuser within VW-2.

None.