Hi, Is there a workaround for this Jira issue:
Error: DATA_READ ERROR: Error parsing JSON - You tried to start when you are using a ValueWriter of type NullableVarCharWriterImpl. File /tmp/test.json Record 2 Fragment 0:0 https://issues.apache.org/jira/browse/DRILL-4520 I tried Union with a source file and does the same issue (hoping drill would properly set the column type form the beginning) The only workaround I could find is to force the query to run on one thread only and hope that the thread will be assigned a file not causing this issue as it's first item to scan. It is very slow solution...(3000+ files on hdfs) The other solution would be to write a Map Reduce Job to validate and fix the faulty column. Any advise is welcome. Thanks Francois
