I created a Vora table in Vora 1.3 and tried to append data to that table from ORC files that I got from SAP BW archiving process (NLS on Hadoop). I had 20 files, in total containing approx 50 Mio records.
When I tried to use the "files" setting in the APPEND statement as "/path/*", after approx 1 hour Vora returned this error message:
com.sap.spark.vora.client.VoraClientException: Could not load table F002_5F: [Vora [eba156.extendtec.com.au:42681.1640438]] java.lang.RuntimeException: Wrong magic number in response, expected: 0x56320170, actual: 0x00000000. An unsuccessful attempt to load a table might lead to an inconsistent table state. Please drop the table and re-create it if necessary. with error code 0, status ERROR_STATUS
Next thing I tried was appending data from each file using separate APPEND statements. On the 15th append (of 20) I've got the same error message.
The error indicates that the Vora engine on node eba156.extendtec.com.au is not available. I suspect it either crashed or ran into an out-of-memory situtation.
You can check the log directory for a crash dump. If you find one, please open a customer message for further investigation.
If you do not find a crash dump, it is likely a out-of-memory situation. You should find confirmation in either the engine log file or in /var/log/messages (if the oom killer ended the process). In that case, the available memory is not sufficient to load the data.