[Bacula-bugs] [Bacula Bug Reports 0002219]: When using tape, the SD waits forever in a mount request when a tape not in changer

[Mantis B. T. <no...@bu...>]

The following issue has been CLOSED 
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http://bugs.bacula.org/view.php?id=2219 
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Reported By:                philhu
Assigned To:                kern
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Project:                    Bacula Bug Reports
Issue ID:                   2219
Category:                   Storage Daemon
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     closed
Resolution:                 no change required
Fixed in Version:           
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Date Submitted:             2016-04-22 14:02 UTC
Last Modified:              2016-12-28 11:51 UTC
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Summary:                    When using tape, the SD waits forever in a mount
request when a tape not in changer
Description: 
After a job completes, If you remove a tape from the changer that was used by
the last job, call it x, and is still is marked append

load other empty appendable tapes, doing update slots, upon running next job,
the system will give error that it looked for tape x in slot 0 and found no tape
in slot 0, and wait forever with a mount request.

You can satisfy it one by one by loading another tape into the drive using 'mtx
load'

The bug is that the system should use the flag 'in changer' to check if the tape
is loaded, if it is not, do NOT try to load slot 0, just look for any other
appendable tape in the pool with warning like:

"Tape x is not in the changer, will load another appendable tape"

Steps to Reproduce: 
load an appendable tape labelled x
run a job that does not fill up tape and let it complete
When completed, take out tape, put in another labeled blank tape, labeled y 
In bconsole: Do an update slots
Do a 'list slots', bloth will be listed, only the latest will show 'in changer'
set to 1

Run a job
It will say it attempted to load tape x from slot 0 with a device error and go
into mount request mode and does NOT attempt to use tape y on its own

Additional Information: 
The bug is that 'in changer' is not used to verify a tape about to be mounted is
indeed in the changer causing the slot 0 error
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 (0007404) kern (administrator) - 2016-10-02 06:15
 http://bugs.bacula.org/view.php?id=2219#c7404 
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It would be helpful if you show the exact sequence of commands (as you did) but
with the output generated by Bacula.

I get the feeling that you removed the tape while Bacula thought it was still
mounted.  To remove a tape that Bacula was using you must first "unmount" the
tape using Bacula (bconsole).  If you skipped that step, Bacula will be
confused.  I am pretty sure this is documented in the manual, if not, it should
be.  All manual operations on the tape changer when Bacula is running must be
coordinated through Bacula so that it does not lose track of what is happening.

If I can see the exact sequence of commands and output, there is a chance that I
can figure out some way to make Bacula recognize that some manual operation has
taken place, but currently it doesn't expect that.

I don't think this is a bug but rather a "limitation" or Bacula "requirement". 
However, I will leave this bug report open in case you have more input. 

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 (0007450) kern (administrator) - 2016-12-28 11:51
 http://bugs.bacula.org/view.php?id=2219#c7450 
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Having no response, I am marking this as not a bug. I suspect that you have
forgotten to do "update slots" after you change what is in the autochanger. 
This is a documented requirement for Bacula to function correctly. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2016-04-22 14:02 philhu         New Issue                                    
2016-10-02 06:15 kern           Note Added: 0007404                          
2016-10-02 06:15 kern           Assigned To               => kern            
2016-10-02 06:15 kern           Status                   new => feedback     
2016-10-02 06:20 kern           Summary                  When using tape, system
obsesses over a tape not in changer => When using tape, the SD waits forever in
a mount request when a tape not in changer
2016-12-28 11:51 kern           Status                   feedback => closed  
2016-12-28 11:51 kern           Resolution               open => no change
required
2016-12-28 11:51 kern           Note Added: 0007450                          
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