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# Date Author Comment
d385a174 04/06/2011 03:49 pm Iustin Pop

Increase the lock timeouts before we block-acquire

This has been observed to cause problems on real clusters via the
following mechanism:

- a long job (e.g. a replace-disks) is keeping an exclusive lock on an
instance
- the watcher starts and submits its query instances opcode which...

687c10d9 01/10/2011 02:41 pm Iustin Pop

Generalize the OpCode-should-be-in-mcpu test

Currently, the unittest TestDispatchTable in mcpu unittest does a
hard-coded approach to test whether an opcode should be included or
not in the mcpu.Processor dispatch table. This is not flexible, so we
replace it with two changes:...

0a31dda0 11/23/2010 11:04 pm Michael Hanselmann

Add consistency test for mcpu dispatch table

Signed-off-by: Michael Hanselmann <>
Reviewed-by: Iustin Pop <>

a7770f03 09/23/2010 04:06 pm Michael Hanselmann

mcpu: Adjust lock acquire strategy

The changes to job queue processing require some changes on this class'
interface. LockAttemptTimeoutStrategy might move to another place, but that'll
be done in a later patch.

Signed-off-by: Michael Hanselmann <>...

25231ec5 11/03/2009 12:34 pm Michael Hanselmann

Ignore log messages in unittests

Signed-off-by: Michael Hanselmann <>
Reviewed-by: Iustin Pop <>

a6db1af2 10/15/2009 05:47 pm Michael Hanselmann

mcpu: Use new timeout class for timeout

Signed-off-by: Michael Hanselmann <>
Reviewed-by: Iustin Pop <>

e3200b18 10/12/2009 01:48 pm Michael Hanselmann

mcpu: Change lock attempt timeout calculation

With this patch all timeouts are pre-calculated. The interface of
the _LockTimeoutStrategy class is also changed a bit; NextAttempt
now returns a new instance.

Signed-off-by: Michael Hanselmann <>...

407339d0 10/12/2009 01:47 pm Michael Hanselmann

mcpu: Implement lock timeouts

The timeout is always between ~0.1 and ~10.0 seconds. A small
variation of ±5% is added to prevent different jobs from
fighting each other. After 10 attempts to acquire the locks with
a timeout, a blocking acquire is made.

Lock status reporting will be improved in a separate patch....