Re: [jgroups-users] JDBC_PING - "clear_table_on_view_change" attribute missing

Use remove_all_data_on_view_change instead

On 28.11.18 10:32, Questions/problems related to using JGroups wrote:
> Hi,
> 
> I’m trying to migrate from jgroups 3.6.11 to 4.0.15.
> 
> However, I have a problem regarding JDBC_PING configuration:
> 
> <*JDBC_PING **connection_driver**="${hybris.database.driver}"
> **connection_password**="${hybris.database.password}"
> **connection_username**="${hybris.database.user}"
> **connection_url**="${hybris.database.url}"
> **initialize_sql**="${hybris.jgroups.schema}"
> **datasource_jndi_name**="${hybris.datasource.jndi.name}"
> **clear_table_on_view_change**="${hybris.jgroups.clear_table_on_view_change}"*/>
> />
> 
> With new, 4.0 xsd schema attribute *clear_table_on_view_change* is not 
> available anymore. Documentation 
> <http://www.jgroups.org/manual4/index.html> ,however still refers to it:
> 
> /Another attribute /|/clear_table_on_view_change/|/ governs how zombies 
> are handled. Zombies are table entries for members which crashed, but 
> weren’t removed for some reason. E.g. if we have a single member 
> /|/A/|/ and kill it (via kill -9), then it won’t get removed from the 
> table./
> 
> /If /|/clear_table_on_view_change/|/ is set to true, then the 
> coordinator //clears// the table after a view change (instead of only 
> removing the crashed members), and everybody re-inserts its own 
> information. This attribute can be set to true if automatic removal of 
> zombies is desired. However, it is costly, therefore if no zombies ever 
> occur (e.g. because processes are never killed with kill -9), or zombies 
> are removed by a system admin, then it should be set to false./
> 
> So it seems to be the same content as for 3.6. Furthermore,
> 
> /Table 19. JDBC_PING/
> 
> table in above mentioned documentation does not contain such an 
> attribute and this is another difference comparing to 3.6.
> 
> So I’m confused a bit now. Was this enabled by default? Replaced by 
> another attribute? Or something else happened?
> 
> Please help.
> 
> Regards
> 
> Michał
> 
> 
> 
> 
> 
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> 

-- 
Bela Ban | http://www.jgroups.org



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