Bug 24713

Summary: NFS or filesystem hangs LINUX
Product: [Retired] Red Hat Linux Reporter: Need Real Name <koehn>
Component: nfs-serverAssignee: Steve Dickson <steved>
Status: CLOSED CURRENTRELEASE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 6.2CC: adeverbigier
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2004-08-11 10:35:14 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Need Real Name 2001-01-23 18:49:38 UTC 
Several computers quickly sending files to a single computer via
NFS. All computers hang. This is unexpected (and incorrect) behavior.

The computers should say they are overwhelmed and abandon
the file transfer with an informative message including the name
of the file not transferred.

Files are 8 MB in size. Two computers are sending to a third. Each
sending computer sends at a rate of one file every five seconds
(on average) for a total rate of 24 files per minute. 100 MB/s ethernet.
The file-send program is a background process. If the send fails, it is 
attempted again in 10 seconds.  10 attempts are made and then the 
send is abandoned. Failure usually occurs between 10 and 200 files.

Work-around is simple,i .e. slow the rate and wait for completion of each
transfer. However, this does not fix the problem. Overwhelmed
file systems or NFS servers should never hang the system. They 
should abandon the problem with a clear message.