MySQL Bugs: #63365: What is errno 120 and 137?

Bug #63365	What is errno 120 and 137?
Submitted:	21 Nov 2011 17:41	Modified:	21 Dec 2011 17:48
Reporter:	Jamie Koc	Email Updates:
Status:	No Feedback	Impact on me:	None
Category:	MySQL Server: Errors	Severity:	S2 (Serious)
Version:	5.1.42	OS:	Linux
Assigned to:		CPU Architecture:	Any

Description:
Getting several of these messages in our mysqld.log

111120 14:14:45 [ERROR] myisam_sort_buffer_size is too small
111120 14:14:45 [Warning] Warning: Enabling keys got errno 120 on xyz, retrying
111120 14:14:45 [ERROR] Number of rows changed from 0 to 199

Our buffer size is large.
mysql> show variables like 'myisam_sort_buffer_size';
+-------------------------+------------+
| Variable_name           | Value      |
+-------------------------+------------+
| myisam_sort_buffer_size | 3221225472 |
+-------------------------+------------+

I am also seeing a lots of messages also saying:
[Warning] Warning: Enabling keys got errno 137 on xyz, retrying

How to repeat:
Not sure how to repeat.

Doesn't perror utility help? Look:

macbook-pro:trunk openxs$ bin/perror 120
MySQL error code 120: Didn't find key on read or update
macbook-pro:trunk openxs$ bin/perror 137
MySQL error code 137: No more records (read after end of file)

No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".