In this blog post, we summarize top ten most popular VMware Tanzu Knowledge Base articles that provide guidance on resolving common Hadoop issues, from Linux ping failures to Hive query errors. These articles offer step-by-step instructions and troubleshooting tips to help you diagnose and fix issues with Hadoop and related technologies.
This VMware Tanzu Knowledge Base article explains how to troubleshoot a Linux ping command failure with the error message “icmp open socket: Operation not permitted.” It provides step-by-step instructions on how to diagnose and fix the issue, which is caused by network configuration or security settings.
This VMware Tanzu Knowledge Base article provides guidance on configuring queues using YARN capacity-scheduler.xml. It explains the basics of YARN queues and how to adjust them based on different use cases. The article also includes sample configurations and troubleshooting tips.
This VMware Tanzu Knowledge Base article addresses an issue where Hive Metastore fails to start and displays the error message “Failed to get schema version.” It provides detailed instructions on how to diagnose and resolve the issue, which is typically caused by incorrect database settings or missing schema objects.
This VMware Tanzu Knowledge Base article discusses how to troubleshoot a DataNode shutting down due to DataNode failed volumes in Pivotal HD. It covers common causes of the issue, such as disk or hardware failure, and provides step-by-step instructions on how to diagnose and fix the problem.
This VMware Tanzu Knowledge Base article provides troubleshooting guidance for a Hive query failure with the error message “Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient.” It explains the possible causes of the issue, including incorrect configuration or missing libraries, and provides detailed instructions on how to resolve it.
This VMware Tanzu Knowledge Base article explains how to change the replication of all blocks in HDFS. It provides step-by-step instructions on how to adjust HDFS settings to increase or decrease the replication factor for all data blocks.
This VMware Tanzu Knowledge Base article discusses how to troubleshoot an alert from YARN indicating that the NodeManager is unhealthy and the local-dirs are bad. It covers the possible causes of the issue, such as disk or permission problems, and provides guidance on how to fix it.
This VMware Tanzu Knowledge Base article addresses a Hive query failure with the exception “java.lang.OutOfMemoryError: Java heap space” when using the TEZ engine. It explains the causes of the issue and provides step-by-step instructions on how to adjust memory settings to resolve the problem.
This VMware Tanzu Knowledge Base article provides guidance on resolving MapReduce job failures on a secured cluster that fails to create application directories. It explains the common causes of the issue, such as incorrect permissions or missing libraries, and provides troubleshooting tips.
This VMware Tanzu Knowledge Base article explains how to retrieve the Hive metadata store password. It provides step-by-step instructions on how to locate and decrypt the password, which is necessary for Hive and Metastore operations.
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