Oracle throws error 'Error message: Linux-x86_64 Error: 28: No space left on device' when we have free space

Issue

• Today we have a problem with create on file on disks /u01. It is a partition for binaries oracle.
• We have a 10GB free space on partition

Archived Log entry 508401 added for thread 2 sequence 84550 ID 0xf0275f dest 1:
Wed Jul 26 00:25:06 2017
Auto-tuning: Shutting down background process GTX2
Non critical error ORA-48180 caught while writing to trace file "/u01/app/oracle/diag/rdbms/retail/RETAIL2/trace/RETAIL2_gtx2_46826.trc"
Error message: Linux-x86_64 Error: 28: No space left on device
Additional information: 1