Case Studies

Problem: The client reported issues with all dags triggered from dag-factory failing, with associated problems such as pods not coming up when triggered and errors in collector pods. Furthermore, there was a lack of error messages in the airflow pods logs, making it challenging to identify the root cause. Process: In order to address the […]

Problem: The client sought consultation on the best way establishing the standard Cassandra topology for a production-ready environment. Process: Cassandra Configurations: 2 Data Centers (PROD and DR). Each DC has 3 nodes of Cassandra. 2 DC are part of one cluster, thereby forming a ring architecture of 6 nodes (3 PROD + 3 DR). RF […]

Problem: The client is experiencing failures during the copy/export process, resulting in Cassandra crashes and errors related to memory exhaustion. These failures occur due to incorrectly formatted date fields and memory-intensive processes involved in copy/export operations. Solution: Identification of Date Formatting Issue: The expert identified that the failures were caused by incorrectly formatted date fields […]

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: FreeIPA-Replication-Troubleshooting We have tried to reproduce the setup by performing the following actions. Installing FreeIPA Server on CentOS 7 server. Which had the default version of FreeIPA […]

Problem: There are two problems with Prometheus monitoring setup: the retention setting isn’t functioning correctly, leading to excessive data storage, and the Prometheus database is frequently getting corrupted, despite varying levels of workload and resource allocation across different environments. Process: Case Details: Environment 1: Approximately 23GB of data is generated in Prometheus across a 3-hour […]

Problem: During a migration from Kafka Streams 2.5.0 to 3.3.1, a client encounters a “Producer Fenced Exception” while processing aggregation tasks using a Processor in Kafka Streams. The issue occurs when attempting to update a State Store changelog topic, initiated by operations reading data from upstream and processing it with a punctuator. Process: Questions: Should […]

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 […]