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Thread: locking problem in FSDirectory when using DualCompassGps

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Permlink Replies: 27 - Pages: 2 [ 1 2 | Next ] - Last Post: Dec 28, 2011 7:00 PM Last Post By: on0123
NetForce1

Posts: 34
Registered: 5/16/07
locking problem in FSDirectory when using DualCompassGps
Posted: May 30, 2007 7:42 AM
 
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Hi,

I get a 'lock obtain timed out' error while performing a full index through a DualCompassGps. The doIndex() method calls replaceIndex which creates a write lock on the index, the create method does also want a lock on the index, but the lock created by doIndex is not yet cleared, so it failes to obtain a lock. I think this has to do with the fact that I use two different compass instances (but that's what DualCompassGps is created for isn't it?) because the problem does not occur when using SingleCompassGps.

Here is a simple test case:

CompassConfiguration configuration = CompassConfigurationFactory.newConfiguration();
configuration.setConnection("file://lock_fail_test_index");
		
configuration.addURL(getClass().getResource("simple/SimpleObject.cpm.xml"));
		
Compass compass = configuration.buildCompass();
Compass compass2 = compass.clone(new CompassSettings());
DualCompassGps gps = new DualCompassGps(compass, compass2);
		
MockIndexGpsDevice device = new MockIndexGpsDevice();
device.setName("mockDevice");
device.add(1, "mock-1");
device.add(2, "mock-2");
device.add(3, "mock-3");
		
gps.addGpsDevice(device);
gps.start();
gps.index();
gps.stop();

SimpleObject is just a simple object similar to MockIndexGpsDeviceObject, the MockIndexGpsDevice is just copied from the compass test source.
Shay Banon

Posts: 4,028
Registered: 9/6/05
Re: locking problem in FSDirectory when using DualCompassGps
Posted: May 30, 2007 2:08 PM   in response to: NetForce1 in response to: NetForce1
Correct
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The two compass instances need to have different connection settings. The index compass uses the connection for building the index and then it replaces the first Compass index.
NetForce1

Posts: 34
Registered: 5/16/07
Re: locking problem in FSDirectory when using DualCompassGps
Posted: May 31, 2007 4:01 AM   in response to: Shay Banon in response to: Shay Banon
 
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Thank you Shay! Is it also possible to delete the directory the index connection points to after replacing the mirror connection with the index connection?
Shay Banon

Posts: 4,028
Registered: 9/6/05
Re: locking problem in FSDirectory when using DualCompassGps
Posted: May 31, 2007 4:06 AM   in response to: NetForce1 in response to: NetForce1
 
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Yes, it will no longer be used.
NetForce1

Posts: 34
Registered: 5/16/07
Re: locking problem in FSDirectory when using DualCompassGps
Posted: May 31, 2007 7:30 AM   in response to: Shay Banon in response to: Shay Banon
 
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Isn't it possible to let compass automatically delete the directory after replacing?
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Posts: 411
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Re: locking problem in FSDirectory when using DualCompassGps
Posted: Aug 23, 2011 10:00 PM   in response to: NetForce1 in response to: NetForce1
 
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Re: locking problem in FSDirectory when using DualCompassGps
Posted: Oct 5, 2011 8:58 PM   in response to: NetForce1 in response to: NetForce1
 
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Re: locking problem in FSDirectory when using DualCompassGps
Posted: Dec 3, 2011 4:18 AM   in response to: NetForce1 in response to: NetForce1
 
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Re: locking problem in FSDirectory when using DualCompassGps
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