Usability issues This topic lists some common exceptions and errors that you may encounter while using Kudu and helps you to resolve issues related to usability. ClassNotFoundException: com.cloudera.kudu.hive.KuduStorageHandlerYou will encounter this exception when you try to access a Kudu table using Hive. This is not a case of a missing jar, but simply that Impala stores Kudu metadata in Hive in a format that is unreadable to other tools, including Hive itself. and Spark. Currently, there is no workaround for Hive users. Spark users can work around this by creating temporary tables.Runtime error: Could not create thread: Resource temporarily unavailable (error 11)You may encounter this error when Kudu is unable to create more threads, usually on versions older than Kudu 1.7. It happens on tablet servers, and is a sign that the tablet server hosts too many tablet replicas. Tombstoned or STOPPED tablet replicasYou may notice some replicas on a tablet server are in a STOPPED state and remain on the server indefinitely. These replicas are tombstones. A tombstone indicates that the tablet server once held a bona fide replica of its tablet.Corruption: checksum error on CFile blockIn versions prior to Kudu 1.8.0, if the data on disk becomes corrupt, you will encounter warnings containing "Corruption: checksum error on CFile block" in the tablet server logs and client side errors when trying to scan tablets with corrupt CFile blocks. Fixing this corruption is a manual process. Parent topic: Troubleshooting Apache Kudu
