ORA-27062: could not find pending async I/Os
Cause: There should have been some async I/Os in the system but a blocking aiowait indicates that there are no more I/Os. It could be either because of an Oracle bug or the vendor OS bug or due to a NFS server not responding
Action: check Oracle trace file, OS message files and contact Oracle Support
https://support.oracle.com/
http://www.oracle.com/