Hi Carl,

> Exception: Unknown Query ID:

The exception indicates that you are launching concurrent queries with
a single client session. I surely know too less about your concrete
implementation, but are the some specific reasons for avoiding the
creation of multiple ClientSession objects?

Best,
Christian


> I have using BaseX in a canonical manner to handle the many translations used 
> in ELR systems. I won't get into specifics but it has been working well. I 
> started looking into the use of a singleton database object in place of the 
> many ClientSession objects created in the constructor of the associated 
> classes. In a single thread the performance varied between a 2x and 5x 
> decrease. That would be expected since the amount of i/o required to load the 
> XML would be replaced by simply executing queries against the database. The 
> application that is utilizing BaseX is multithreaded. Once I deployed the 
> application in JBoss I continue to receive exceptions:
>
> These class methods are "synchronized" and are being invoked via Xalan 
> callouts from XSLT.
>
> I am currently using version 7.9 from the Maven repository.
>
> Is BaseX thread safe in this manner?
>
>
> Carl R Bondeson
> Systems Developer
> Department of Public Health
> Data Processing
> 410 Capitol Ave
> Hartford, CT 06134
> Phone: 860-509-7434
> carl.bonde...@ct.gov

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