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Thread: Compass TIM

This question is not answered. Helpful answers available: 2. Correct answers available: 1.


Permlink Replies: 14 - Pages: 1 - Last Post: Nov 9, 2011 2:28 AM Last Post By: yangtianbo
coldsrnt

Posts: 5
Registered: 10/20/09
Compass TIM
Posted: Feb 18, 2010 11:57 AM
 
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Guys,
i'm really in stuck and very appreciate your help

the issue i faced is following:

there is a cluster of 3 node: the first one is for read-only index, the second one is for read/write index, and at last the third one is a node where the Terracotta server is up and running. everything configured perfectly, and everything works fine especially if a single server. the one thing I cannot fix it is a cluster related issue that is the next: when I rebuild the index the first node don't see the changes even if the cache is cleared every 5 sec. in the same time if i modify the index via the application (actually compass.save(dto) is performed) the changes are visible in cluster... i use Terracotta 3.1.0 + Compass 2.2.0 + JBoss 4.2.0GA i tried everything, but i can't figure out the root problem. i guess the issue might be related with the fact i use Compass TIM that was created for Terracotta older version than i'm currently using? Any ideas?

P.S.
on the second node (the one that write/read index) the exception is arisen during an index clearing:

2010-02-18 19:03:26,818 DEBUG http://org.compass.core.lucene.engine.manager.DefaultLuceneSearchEngineIndexManager Failed to perform schedule task
org.compass.core.engine.SearchEngineException: Failed to check last modified on global index chache on sub index category; nested exception is java.io.FileNotFoundException: clearcache
java.io.FileNotFoundException: clearcache
at org.compass.needle.terracotta.TerracottaDirectory.fileModified(TerracottaDirectory.java:148)
at org.compass.core.lucene.engine.manager.IndexHoldersCache.checkAndClearIfNotifiedAllToClearCache(IndexHoldersCache.java:218)
at org.compass.core.lucene.engine.manager.DefaultLuceneSearchEngineIndexManager$11.doInTransaction(DefaultLuceneSearchEngineIndexManager.java:428)
at org.compass.core.impl.DefaultCompass$CompassTransactionContext.execute(DefaultCompass.java:430)
at org.compass.core.lucene.engine.manager.DefaultLuceneSearchEngineIndexManager.performScheduledTasks(DefaultLuceneSearchEngineIndexManager.java:426)
at org.compass.core.lucene.engine.manager.DefaultLuceneSearchEngineIndexManager$ScheduledIndexManagerRunnable.run(DefaultLuceneSearchEngineIndexManager.java:527)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:294)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:59)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)

thank you in advance,
\M/

Alois Cochard

Posts: 12
Registered: 7/8/09
Re: Compass TIM
Posted: Feb 19, 2010 6:23 AM   in response to: coldsrnt in response to: coldsrnt
 
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Hello coldsrnt,

I was done building a POC doing distributed write/read on Lucene index using Terracotta.

The difference with you is that I didn't use JBoss, and I use Terracotta 3.0.1.

I'm not experimenting the problem you describe, So I recommend you to first try to use Terracotta 3.0.1, I took a look on your tc-config.xml (on the other thread you started). I noticed your using lot of TIM, are they all usefull ? don't know this can perhaps made somethings go wrong.

Have you tried using only compass-tim ? are tim-searchalbe/pipes/masterworker/cglib really used by your code ?

And finally, have you took a look the doc (http://www.compass-project.org/docs/2.2.0/reference/html/needle-terracotta.html) :

"When a transaction commits by one of the client nodes, it will not be immediately visible for search operations. It will be visible only after the actual node that will process the transaction has done so, and the cache invalidation interval has kicked in to identify that the shared index has changed and the new index needs to be reloaded (happens in the background when using Compass). The cache invalidation interval (how often Compass will check if the index has changed) can be set using the following setting: compass.engine.cacheIntervalInvalidation. "

Have you tried playing with 'compass.engine.cacheIntervalInvalidation' ?

Would love to know if any of this suggestion help you. Because I'm too implementing a terracotta/compass solution, and would be nice to share our experiences.

Thanks,

Alois Cochard
Alois Cochard

Posts: 12
Registered: 7/8/09
Re: Compass TIM
Posted: Feb 19, 2010 6:29 AM   in response to: coldsrnt in response to: coldsrnt
 
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Just a point to add...

Seems that my supposition about TIM conflict is correct (http://forums.terracotta.org/forums/posts/list/2470.page) :
"- On the Searchable Map side, would it be possible to somehow integrate the Searchable Map TIM together with Compass?
No. SearchableMap itself is like min-compass + terracotta clustering. Its designed to replace(or provide another option) compass tc clustering at the same time providing compass like api.
SearchableMap each node has its own index so querying throughput is linear to number of nodes in cluster."

Respond by Terracotta engineer...

So I recommend you at first to try removing the 'tim-searchable' module and do the test ...

Alois Cochard
coldsrnt

Posts: 5
Registered: 10/20/09
Re: Compass TIM
Posted: Feb 19, 2010 10:19 AM   in response to: Alois Cochard in response to: Alois Cochard
 
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The cache invalidation interval is set to 5 sec. But this doesn't help even if I set different interval values.

P.S. tim-searchalbe was removed a long time ago :) the configuration files you've mentioned are not actual anymore.
Alois Cochard

Posts: 12
Registered: 7/8/09
Re: Compass TIM
Posted: Feb 19, 2010 10:46 AM   in response to: coldsrnt in response to: coldsrnt
 
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Hello coldsrnt,

Ok, thanks for precision.

Have you tried with Terracotta 3.0.1 ?

Last idea I'v got ...

Best regards,

Alois Cochard
coldsrnt

Posts: 5
Registered: 10/20/09
Re: Compass TIM
Posted: Feb 22, 2010 4:16 AM   in response to: Alois Cochard in response to: Alois Cochard
 
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Unfortunately we cannot move back to 3.0.1 because we use ehcache 1.7.0 that is distributed on cluster via Terracotta. Probably Solr is the best solution for index distributing on cluster.
Alois Cochard

Posts: 12
Registered: 7/8/09
Re: Compass TIM
Posted: Feb 23, 2010 9:29 AM   in response to: coldsrnt in response to: coldsrnt
 
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Solr can be a good solution for distributed lucene indexing, of course... but you are limited to the Solr structure and you can only index full text document.

We are using compass to be able to customize the way we create and use lucene index, in this situation Solr doesn't suit our needs. IMHO, if you only need to index full text document then Solr will be easier to implement and deploy but you gonna be limited in term of functionality...

Good luck,

Alois Cochard
louisvuittonbox

Posts: 411
Registered: 8/23/11
Re: Compass TIM
Posted: Aug 23, 2011 9:32 PM   in response to: coldsrnt in response to: coldsrnt
 
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yangtianbo

Posts: 10
Registered: 11/7/11
Re: Compass TIM
Posted: Nov 9, 2011 2:22 AM   in response to: Alois Cochard in response to: Alois Cochard
 
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yangtianbo

Posts: 10
Registered: 11/7/11
Re: Compass TIM
Posted: Nov 9, 2011 2:24 AM   in response to: yangtianbo in response to: yangtianbo
 
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yangtianbo

Posts: 10
Registered: 11/7/11
Re: Compass TIM
Posted: Nov 9, 2011 2:25 AM   in response to: yangtianbo in response to: yangtianbo
 
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yangtianbo

Posts: 10
Registered: 11/7/11
Re: Compass TIM
Posted: Nov 9, 2011 2:26 AM   in response to: yangtianbo in response to: yangtianbo
 
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yangtianbo

Posts: 10
Registered: 11/7/11
Re: Compass TIM
Posted: Nov 9, 2011 2:28 AM   in response to: yangtianbo in response to: yangtianbo
 
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