Summary -

In this topic, we described about the 100 LOCKED with detailed example.

If this error condition occurred, the task gets abended with AEX8.

CommandRESP2, Description & Solution
DELETE An attempt has been made to delete a record, but lock exists against the key.

Solution: - The record might get locked for some other reason. Wait for some time and try again.
READ
READNEXT
READPREV
106 - An attempt is being made to read a record either specifying the UPDATE keyword or specifying CONSISTENT or REPEATABLE, but the record is locked by a retained lock.

Solution: - The record might get locked for some other reason. Wait for some time and try again.
REWRITE An attempt has been made to rewrite a record, but lock exists against the unique alternate key that is involved in the request.

Solution: - The record might get locked for some other reason. Wait for some time and try again.
WRITE An attempt has been made to write a record, but lock exists against the same key of the record.

Solution: - The record might get locked for some other reason. Wait for some time and try again.