Hi Simon,

Thanks for your observations.

PathCache instances should be cleaned up automatically once a thread is closed, but I’ll try to find cases in which this doesn’t work as expected [1].

Did you encounter increased memory consumption when running Tomcat for a longer time (which might indicate a real memory leak), or is it just the message that was confusing? Do all of the errors point to the PathCache class, or also to other BaseX Java classes?

Best Christian

[1] https://github.com/BaseXdb/basex/issues/1617

On Tue, Aug 28, 2018 at 10:14 AM Simon Chatelain schatela@gmail.com wrote:

Hello all,

I am currently using BaseX in embedded mode as a XQuery processor in a tomcat webapplication. I am receiving some XML, create a BaseX in memory database, execute some XQuery, then close the context.

But when I stop tomcat or reload the web application, I have a lot of errors saying:

SEVERE [localhost-startStop-2] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [webap] created a ThreadLocal with key of type [java.lang.ThreadLocal.SuppliedThreadLocal] (value [java.lang.ThreadLocal$SuppliedThreadLocal@60506a99]) and a value of type [org.basex.query.expr.path.PathCache] (value [org.basex.query.expr.path.PathCache@665cfafa]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.

Is there a way to avoid that error, by forcibly clearing these cache or something ?

Thanks

Simon