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Bug 321671 - 5 Minutes Tutorial doesn't work, section about changing the workflow
Summary: 5 Minutes Tutorial doesn't work, section about changing the workflow
Status: CLOSED FIXED
Alias: None
Product: z_Archived
Classification: Eclipse Foundation
Component: Smila (show other bugs)
Version: unspecified   Edit
Hardware: PC Linux
: P3 normal (vote)
Target Milestone: ---   Edit
Assignee: Project Inbox CLA
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Reported: 2010-08-04 03:07 EDT by nils.thieme CLA
Modified: 2022-07-07 11:31 EDT (History)
2 users (show)

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Description nils.thieme CLA 2010-08-04 03:07:16 EDT 
Build Identifier: I20100608-0911

If I had change the workflow as in the tutorial described it get the following error message if I try to start the web crawler by the JConsole interface:

Error during executeCrawl of DataSourceId 'web': org.eclipse.smila.connectivity.deltaindexing.DeltaIndexingException: data source web is already locked by another session

Reproducible: Always

Steps to Reproduce:
1. Work on the tutorial.
2. Start the web crawler by JConsole
Comment 1 nils.thieme CLA 2010-08-04 03:51:14 EDT 
The bug can be narrowed. In the config file QueueWorkerListenerConfig the first rule must be changed by the tutorial. If the number threads still remains 4 the error message is shown. It seeams that a thread problem exists.

Error entry in config file:

<Rule Name="ADD Rule" WaitMessageTimeout="10" Threads="4">
  <Source BrokerId="broker1" Queue="SMILA.connectivity"/>
  <Condition>Operation='ADD' and NOT(DataSourceID LIKE 'web%')</Condition>
  <Task>
    <Process Workflow="AddPipeline"/>
  </Task>
</Rule>
Comment 2 Sebastian Voigt CLA 2010-08-06 05:21:23 EDT 
Hi Nils,

thank you for the feedback and welcome to eclipse smila.

The error messages: 
org.eclipse.smila.connectivity.deltaindexing.DeltaIndexingException: data
source web is already locked by another session
applies to a bundle that is necessary for the crawling process. 
The amount of listener-threads should have no impact to this locking problem.

A database entry seems to be locked. Can you describe how you get to this status?



For a fresh new start please delete your workspace folder (it will erased all database including the index).

I will also daniel as CC, maybe it has some relevance to bug
https://bugs.eclipse.org/bugs/show_bug.cgi?id=302634.

Thanks in advance for your effort

Sebastian
Comment 3 Sebastian Voigt CLA 2010-08-16 09:28:05 EDT 
I can reproduce this problem.

I will fix that in the next upcoming days
Comment 4 Sebastian Voigt CLA 2010-08-16 09:31:14 EDT 
Ups, i am sorry, i had the wrong bug open.

Do you have new experiences with the problem in this bug?

Sometimes the deltaindexing will be locked (e.gg if you kill the application).
but you can
delete the whole workspace

or use the JConsole to unlock a specific datasource deltaindexing db. 

(In reply to comment #3)
> I can reproduce this problem.
> 
> I will fix that in the next upcoming days
Comment 5 Igor Novakovic CLA 2011-09-21 06:45:31 EDT 
Since we completely updated 5 minutes tutorial I am closing this bug.
Comment 6 Andreas Weber CLA 2013-04-15 11:48:08 EDT 
Closing this