Case Studies

Problem: After upgrading Jenkins to LTS Version 2.440.1 and updating installed plugins, the client encountered an issue with active choice parameters on the “build with parameters” page. Specifically, the page is waiting for full rendering before executing scripts within the active choice parameters, notably those involving HTTP requests. This delay has caused certain features to […]

Problem: Not Showing Patroni Output in PG DR Database. The team faced an issue where the Patroni status was visible on the production (PROD) server but not on the disaster recovery (DR) server. The discrepancy hindered the ability to monitor the DR environment effectively. Process: Request Patroni Configuration and Logs: Obtain patroni.yml from both PROD […]

Problem: The client was planning an upgrade of the MySQL database server from Red Hat Enterprise Linux (RHEL) 7.x to RHEL 8.x. The MySQL version currently running on the server was 14.14 (Distrib 5.7.34). The client needed to understand the compatibility of this MySQL version with RHEL 8.x and sought guidance on any additional steps […]

Problem: The client reported a recurring issue with the application, which consistently threw an error: org.postgresql.util.PSQLException: An I/O error occurred while sending to the backend. He was uncertain about the root cause of this error and sought assistance to diagnose and resolve the issue. The client’s initial request was to understand what should be checked […]

Problem: The client, deploying a production Cassandra cluster on OpenShift, encountered persistent communication issues between two datacenters, each hosting three Cassandra nodes. Despite initial configuration and verification, nodes in Datacenter 1 (“RCKL”) and Datacenter 2 (“CLSP”) were unable to establish consistent communication. SSL handshake failures and inconsistent OpenSSL connectivity tests exacerbated the problem, indicating potential […]

Problem: Airflow login failed with an “Invalid login” prompt for the user “admin” in production. The environment details are as follows: Helm version 1.9.0 and Airflow Image version 2.6.3. The expected outcome was a successful login. Solution: Identify the Issue: The problem was related to login issues with the Airflow UI using the “admin” user. […]

Problem: A client was experiencing data inconsistencies with the Lucene index on Cassandra and suspected improper shutdown procedures as the root cause. The kill -9 command was used to shut down Cassandra, which led to concerns that data was not being written to disk properly. The client sought guidance on the best way to shut […]

Problem: The client had a 6-node multi-DC setup for Cassandra (3 nodes in PROD – East US2 and 3 nodes in DR – West US2) and needed to alter a keyspace. The keyspace was initially defined as follows: CREATE KEYSPACE bulk_api_management WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'} AND durable_writes = true; The client wanted […]

Problem: A client faced difficulties downloading images from their local Nexus repository using Podman. Despite several troubleshooting attempts, including adding the registry to insecure registries and adding the certificate locally, the issue persisted. The specific error encountered was related to certificate validation. Process: Initial Troubleshooting: The client added the Nexus registry to the list of […]