Case Studies

Problem: The client encountered an error in the apiservice v1beta1.custom.metrics.k8s.io, with the status showing “False” and a message indicating that the service/prometheus-adapter in a specific namespace is not listening on port 6443. The client provided details, including the helm chart files used for deployment, seeking a resolution as the issue persisted across AWS and Azure […]

Problem: The client seeks guidance on determining the appropriate value for the “index.mapping.total_fields.limit” parameter in Elasticsearch version 7.15.2. Process: Initial Query and Analysis: The client sought advice on determining the appropriate value for the index.mapping.total_fields.limit Elasticsearch parameter based on their data characteristics. Script Execution: An expert provided scripts (both in Bash and Python) to analyze […]

Problem: OpenSearch version 1.3.6 RCM OpenSearch DR(COB) High availability setup is not working in the Production environment and lower environment. For Production, the client has a 4-node cluster, out of which 50% availability cluster setup is configured. The client expects that when one node goes down, the other will take over as master. High Availability […]

Problem: Triggering DAGs from Dag_factory for the initial load was not successful. The Dag_factory indicates success, but Collectors did not trigger. As a workaround, when the client triggers the DAG directly from the SQL collector, the drivers come up and are running. Solution: In a series of meetings, the team addressed Airflow issues encompassing the […]

Problem: The key challenge emerged when the university aimed to implement Kerberos Single Sign-On (SSO) for FreeIPA and configure Keycloak to seamlessly connect with FreeIPA. Two significant updates revealed obstacles: an inability to access a third-party application for Kerberos installation and the absence of a topology or visual representation of the configuration. Additionally, the university […]

Problem: The client reported encountering memory-related issues and tombstone cell messages in the system.log file of their Apache Cassandra deployment. Notable log entries included warnings about maximum memory usage, tombstone cells, and concerns about a hanging repair process. The issue seemed to have improved temporarily after increasing the heap size but resurfaced after two days. […]

Problem: The challenge arises when attempting to upgrade from Spring Boot (SB) version 2.7.x to SB 3.1.x due to compatibility issues with OpenJPA. No compatible version of OpenJPA has been found for Spring Boot 3.1.x. Upgrading to Spring Boot 3.1.x presents hurdles in terms of OpenJPA compatibility. The current version of OpenJPA lacks support for […]

Problem: The problem is that commit logs in the production Cassandra cluster are accumulating excessively without being deleted, leading to a full filesystem and subsequent database crashes. Process: Step 1: Hardware Specifications and Disk Space: Requested hardware specifications for each Cassandra node. Checked disk space on all nodes using df -h command. Step 2: System […]

Problem: The client encountered a critical issue where LW Locking on the PostgreSQL DB level, specifically the MultiXactOffsetControlLock, led to a complete outage of the production system. This resulted in 255 sessions being locked for 4 hours causing a significant impact on the system’s availability. Solution: PostgreSQL Version and Configuration: The PostgreSQL version in use […]