Bug 4794 – gass_server_ez consumes all cpu when transfering certain files

Bug 4794 - gass_server_ez consumes all cpu when transfering certain files

Summary:

gass_server_ez consumes all cpu when transfering certain files

Status:	RESOLVED FIXED

Product:	GridFTP
Component:	GASS
Version:	4.0.1
Platform:	All All

Importance:	P3 normal
Target Milestone:	4.0.4
Assigned To:	Joe Bester

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2006-10-19 16:39 by Jaime Frey
Modified:	2006-10-23 11:33 (History)

Attachments
New GASS Transfer Package (235.35 KB, application/x-tar) 2006-10-20 15:15, Joe Bester	Details
Add an attachment (proposed patch, testcase, etc.)

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Description From Jaime Frey 2006-10-19 16:39:30

I've found some text files that cause the gass_server_ez module to eat up all
the available cpu and never complete the transfer. The distinguishing
characteristic apppears to be that the text files have a few 600-character long
lines. When one of those lines spans the 1MB size mark of the file, the server
stops receiving the file, the client hangs, and the server consumes all of the
cpu. The line before the long line is the last thing written to disk. The
server still responds to other transfer requests.

When I break the long lines of these files into lengths shorter than 80
characters, the problem goes away. 12-15MB binary files transfer just fine as
well.

I'm using globus-gass-server and globus-url-copy. Globus 4.0.1 and 4.0.3 show
this problem.
I will post one of the files that causes the problem.

------- Comment #1 From Jaime Frey 2006-10-19 16:41:51 -------

Bugzilla doesn't like 1MB+ files, apparently. Is there some other way I can
send you the file?

------- Comment #2 From Joe Bester 2006-10-20 10:56:43 -------

Can you send a link or a program to generate such a test file. Also, are you
using some particular options with the GASS server program?

joe

------- Comment #3 From Jaime Frey 2006-10-20 13:29:17 -------

Here's a link to a file that causes the problem:
http://www.cs.wisc.edu/~jfrey/bug4794/lgfile

Also, the problem only happens if I go local -> remote, like so:
globus-url-copy file:///tmp/lgfile
https://nostos.cs.wisc.edu:57970/tmp/lgfile.1

I'm starting globus-gass-server with no command-line arguments.

------- Comment #4 From Joe Bester 2006-10-20 15:15:05 -------

Created an attachment (id=1095) [details]
New GASS Transfer Package

Attaching an update to the GASS Transfer implementation which I think fixes
this issue.

joe

------- Comment #5 From Jaime Frey 2006-10-20 16:34:30 -------

That did the trick. The files transfer just fine now.

------- Comment #6 From Joe Bester 2006-10-23 11:33:30 -------

Committed to trunk and 4.0 branch. Advisory info at
http://www.globus.org/toolkit/advisories.html?version=4.0#globus_gass_transfer-2.11

joe