Backing off 'x' hours 'y' minutes and 'z' seconds on upload of file '(file)'

From Unofficial BOINC Wiki

Contents 1 General 2 Version Information 3 Example Log(s) 3.1 Couldn't Start Upload 3.1.1 Line-By-Line Explanation 3.2 Temporarily Failed Upload 3.2.1 Line-By-Line Explanation 4 Other Related Messages

[edit] General

Message Type: Information Message

This error means that the BOINC Client Software attempted to send the Result Data File to the Project's Data Server but was unable to contact the Project's Data Server or there was some other error during the transfer of the Result Data File.

Because the error may have been caused by the Result Data File already being overloaded with requests, the BOINC Client Software is going to wait a specified amount of time before it attempts to upload the file again. Using Exponential Back-Off, the BOINC Client Software will wait an increasing amount of time before it makes another attempt.

This prevents the Participant's Computers adding to the "flooding" of the Project's Data Server with requests and thereby increasing the load on the Project's Data Server.

[edit] Version Information

• Version 4.2x (?)
  • Replaced generic message: Backing off "x" hours "y" minutes "z" seconds on transfer of file '(file)'

[edit] Example Log(s)

[edit] Couldn't Start Upload

(1) 5/23/2005 8:18:36 PM|Einstein@Home|Computation for result H1_1336.5__1336.9_0.1_T08_Fin1 finished
(2) 5/23/2005 8:18:37 PM|             |Can't resolve hostname [einstein.phys.uwm.edu] (valid name,
                                       no data record of requested type)
(3) 5/23/2005 8:18:37 PM|Einstein@Home|Couldn't start upload of H1_1336.5__1336.9_0.1_T08_Fin1_2_0
(4) 5/23/2005 8:18:37 PM|Einstein@Home|URL
                                       http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/file_upload_handler: error
                                       -113
(5) 5/23/2005 8:18:37 PM|Einstein@Home|Backing off 1 minutes and 0 seconds on upload
                                       of file H1_1336.5__1336.9_0.1_T08_Fin1_2_0
    -+-+/\/\/\/\/\ Log Break /\/\/\/\/\-+-+-
(6) 5/25/2005 9:21:44 PM|Einstein@Home|Started upload of H1_1336.5__1336.9_0.1_T08_Fin1_2_0
(7) 5/25/2005 9:21:47 PM|Einstein@Home|Finished upload of H1_1336.5__1336.9_0.1_T08_Fin1_2_0
(8) 5/25/2005 9:21:47 PM|Einstein@Home|Throughput 49635 bytes/sec

Line-By-Line Explanation

1. Computation for result '(result)' finished

   We completed the processing of the Work Unit and we now have a Result Data File to upload.

2. Can't resolve hostname ['(host-name)'] (valid name, no data record of requested type)

   The BOINC Client Software attempts to contact the Project's Data Server, and fails to make the connection because the BOINC Client Software cannot find a translation of the URL into an IP Address.

3. Couldn't start upload of '(file-name)'

   Because it could not make the name conversion, the upload failed.

4. URL '(url)': error '(error-code)'

   Identifies the URL that was the source of the problem, and the internal Error Code that was returned.

5. Backing off 'x' hours 'y' minutes and 'z' seconds on upload of file '(file)'

   This message indicates that we will use Exponential Back-Off to calculate a time interval to wait before attempting to make another try to upload the file to the Project's Data Server.

   Some time later ...

6. Started upload of '(file)'

   The BOINC Daemon initiated an upload action with the Einstein@Home Project.

7. Finished upload of '(file)'

   The BOINC Daemon completed the data transfer to the Project's Data Server.

8. Throughput 'x' bytes/sec

   The measured speed of transfer, in this case was 49,635 bytes per second. This is a fairly high rate of data transfer and is possible as I have a Cable Modem and an "always-on" Internet connection.

[edit] Temporarily Failed Upload

08/06/2005 21:32:35|SETI@home|Started upload of 02dc03aa.18456.18193.903410.191_1_0
08/06/2005 21:33:35|SETI@home|Temporarily failed upload of 02dc03aa.18456.18193.903410.191_1_0: 500
08/06/2005 21:33:35|SETI@home|Backing off 1 minutes and 0 seconds on upload of file
                              02dc03aa.18456.18193.903410.191_1_0

Line-By-Line Explanation

• Started upload of '(file)'

The BOINC Daemon initiated an upload action with the SETI@Home Project.

• Temporarily failed upload of '(file)'

The BOINC Daemon waited for the time allowed, but did not receive a reply so this attempt is halted.

• Backing off 'x' hours 'y' minutes and 'z' seconds on upload of file '(file)'

Now we use Exponential Back-Off to calculate a time interval to wait before attempting to make another try to upload the file to the Project's Data Server.

[edit] Other Related Messages

• Backing off 'x' hours 'y' minutes and 'z' seconds on download of file '(file)'
• Backing off 'x' hours 'y' minutes and 'z' seconds on upload of file '(file)'
• Checksum or signature error for '(file)'
• Deferring communication with project for "x" hours, "y" and "z" seconds
• Finished download of '(file)'
• Finished upload of '(result)'
• Giving up on download of '(file)': file was not found on server
• Giving up on download of '(file)': Downloaded file had wrong size: expected "x", got "y" md5_file: can't open '(file)'
• Giving up on upload of '(file)': server rejected file
• Permanently failed download of '(file)'
• Permanently failed upload of '(file)'
• Started download of '(file)'
• Started upload of '(result)'
• Temporarily failed download of '(file)' Obsolete 4.3x
• Temporarily failed download of '(file)': '(error-code)' Obsolete 4.72
• Temporarily failed download of '(file)': '(error-text)'
• Temporarily failed upload of '(file)' Obsolete 4.3x
• Temporarily failed upload of '(file)': '(error-code)' Obsolete 4.72
• Temporarily failed upload of '(file)': '(error-text)'
• Throughput 'x' bytes/sec
• Unrecoverable error for result '(result)' (WU download error: couldn't get input files: '(file-list)': MD5 computation error)