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From "Olivier Terrier" <olivier.terr...@temis.com>
Subject Error handling parameters in CPE with a Vinci processor
Date Tue, 24 Mar 2009 10:14:30 GMT
Hi all

We are a little bit puzzled about the handling of the error handling parameters of a CPE that
has a Vinci remote Cas processor with its "service-access" deployment parameter set to "random"

We set the error parameters to the following values:

  <errorHandling>
  <errorRateThreshold action="continue" value="10/1000" /> 
  <maxConsecutiveRestarts action="continue" value="7" waitTimeBetweenRetries="10000" />

  <timeout max="600000" default="-1" /> 
  </errorHandling>

And it looks like, when our Vinci processor fails for some reason, the CPE intents gracefully
to reconnect up to N times (N=10 which is the value of the maxConsecutiveRestarts parameter)
which is the expected behaviour. But the "waitTimeBetweenRetries" delay is not used at all.
Apparently a delay near 2 secs is used as you can see in the following log events:


20/03/09 10:30:46 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:30:49 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:30:51 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:30:53 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:30:55 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:30:57 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:30:59 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:31:01 - 49: org.apache.uima.collection.impl.cpm.container.deployer.VinciTAP.initialize:
ATTENTION: The system is unable to connect to the service host uima.consumer.DocumentConsumer.5019
through the service port . (Thread Name: [Procesing Pipeline#1 Thread]::)
20/03/09 10:31:01 - 49: org.apache.uima.collection.impl.cpm.container.deployer.vinci.VinciCasProcessorDeployer.initialize:
ATTENTION: Service Connection Exception. Max number of retries reached. (Thread Name: [Procesing
Pipeline#1 Thread]::) Service Name: uima.consumer.DocumentConsumer.5019 Max Retry Count: -1
20/03/09 10:31:01 - 49: org.apache.uima.collection.impl.cpm.container.deployer.vinci.VinciCasProcessorDeployer.initialize:
ATTENTION: The Max Restart Count value 7 exceeds the allowed limit. (Thread Name: [Procesing
Pipeline#1 Thread]::) Service Name: consumer_1224757309781_repo5019_27 


I had a look at the implementation of the class org.apache.uima.collection.impl.cpm.container.deployer.vinci.VinciCasProcessorDeployer

And actually in the method

  private int attachToServices(boolean redeploy, String aServiceUri, int howMany,
          ProcessingContainer aProcessingContainer) throws Exception;

It is clear that the "sleepBetweenRetries" only occurs if the Vinci Cas processor is in "exclusive"
mode.
On the contrary (random mode) the method calls directly the method

  private synchronized boolean activateProcessor(CasProcessorConfiguration aCasProcessorConfig,
          String aService, ProcessingContainer aProcessingContainer, boolean redeploy);

Which uses a hard coded timeout of 1 sec (SLEEP_TIME) between each retries instead of the
waitTimeBetweenRetries.

Someone can tell me if this is the intended behaviour and why it is not consistent in exclusive/random
modes?

Thanks in advance

Olivier Terrier
Core Products Software Development Manager
TEMIS S.A. 
Text Intelligence in your daily business
5, Rue du Tour de l'Eau
38400 Saint Martin d'Hères - France
Direct: +33 (0)4 56 38 24 06
Mobile: +33 (0)6 60 36 93 11
Visit our website! www.temis.com
 


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