Difference between revisions of "Waiting for read-lock on file"

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Sometimes typing this multiple times can help make sure the table is really unlocked.  
 
Sometimes typing this multiple times can help make sure the table is really unlocked.  
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<!-- Commenting this section due to multiple users having errors when running simple tasks like plotting data. Forcing the deletion of .locked files no longer seems to be a good way of releasing a table lock in more recent CASA versions (JAS).
  
 
In extreme cases, you might have to just delete the table.lock file manually in your .ms directory. Here is the '''pythonic''' way to get rid of table-lock files in the present directory and subdirectories. Use the following code with caution!
 
In extreme cases, you might have to just delete the table.lock file manually in your .ms directory. Here is the '''pythonic''' way to get rid of table-lock files in the present directory and subdirectories. Use the following code with caution!
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         if name == 'table.lock': os.remove(os.path.join(root,name))
 
         if name == 'table.lock': os.remove(os.path.join(root,name))
 
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== Which process is locking the file? ==
 
== Which process is locking the file? ==

Latest revision as of 11:52, 19 June 2018

Hints, Tips, and Tricks

You might come across an error that looks like this:

2010-02-18 01:08:42 INFO listobs    Process 21666: waiting for read-lock on file .../Leo/leo1.ms/table.lock

And no tasks will operate within CASA on the .ms file anymore. Quitting out and restarting CASA doesn't seem to help.

Right now, the suggested fix for this is to try a clearstat:

clearstat

Sometimes typing this multiple times can help make sure the table is really unlocked.


Which process is locking the file?

It is possible to find the process holding the lock with the following command:

   showtablelock tablename

If the table is locked, it tells which pid holds the lock. Thereafter ps can tell you exactly what process it is and you can decide if it needs to be ended or killed.


Last checked on CASA Version 3.0.0 (r9860).


--Laura Chomiuk 20:03, 18 February 2010 (UTC)