This was a quite interesting problem -- Oracle terminated itself. After checking the alert log, it turned out the disk holding the temporary tablespace data files was full. ORA-63999: data file suffered media failure ORA-01114: IO error writing block to file 2050 (block # 322176) ORA-01110: data file 2050: '/dbase/temp/PROD/temp2.dbf' ORA-27072: File I/O error Linux-x86_64 … Continue reading ORA-63999: data file suffered media failure — Oracle shut down by itself →