ORA-00600: internal error code, arguments: [kclantilock_17]

This error can be received from databases in Oracle 12.2 and later. This error causes Instance to restart. This is due to bug 27162390. The following patch can be applied to this bug.

Patch 27162390: LNX64-181-RAC: LMS HIT ORA-600[KCLANTILOCK_17], INST CRASH

The problem is fixed in version 18.1.